pandora-kernel.git
9 years agoMerge branch 'next' into for-linus
Dmitry Torokhov [Fri, 20 Feb 2015 19:54:53 +0000 (11:54 -0800)]
Merge branch 'next' into for-linus

Second round of updates for 3.20.

9 years agoMerge branches 'core', 'cxgb4', 'iser', 'mlx4', 'mlx5', 'ocrdma', 'odp', 'qib' and...
Roland Dreier [Fri, 20 Feb 2015 17:04:40 +0000 (09:04 -0800)]
Merge branches 'core', 'cxgb4', 'iser', 'mlx4', 'mlx5', 'ocrdma', 'odp', 'qib' and 'srp' into for-next

9 years agoIB/qib: Add blank line after declaration
Mike Marciniszyn [Fri, 16 Jan 2015 16:23:31 +0000 (11:23 -0500)]
IB/qib: Add blank line after declaration

Upstream checkpatch now requires this.

Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
9 years agoIB/qib: Fix checkpatch warnings
Mike Marciniszyn [Fri, 16 Jan 2015 15:52:18 +0000 (10:52 -0500)]
IB/qib: Fix checkpatch warnings

Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
9 years agoi2c: ocores: rework clk code to handle NULL cookie
Wolfram Sang [Thu, 19 Feb 2015 16:22:34 +0000 (17:22 +0100)]
i2c: ocores: rework clk code to handle NULL cookie

For, !HAVE_CLK the clk API returns a NULL cookie. Rework the
initialization code to handle that. If clk_get_rate() delivers 0, we use
the fallback mechanisms. The patch is pretty easy when ignoring white
space issues (git diff -b).

Suggested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Tested-by: Max Filippov <jcmvbkbc@gmail.com>
9 years agoMIPS: OCTEON: irq: add CIB and other fixes
David Daney [Thu, 15 Jan 2015 13:11:19 +0000 (16:11 +0300)]
MIPS: OCTEON: irq: add CIB and other fixes

- Use of_irq_init() to initialize interrupt controllers
- Get rid of some unlikely()
- Add CIB to support SATA and other interrupts
- Add support for CIU SUM2 interrupt sources

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Leonid Rosenboim <lrosenboim@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Signed-off-by: Peter Swain <peter.swain@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8947/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Don't do acknowledge operations for level triggered irqs.
David Daney [Thu, 15 Jan 2015 13:11:18 +0000 (16:11 +0300)]
MIPS: OCTEON: Don't do acknowledge operations for level triggered irqs.

The acknowledge bits don't exist for level triggered irqs, so setting
them causes the simulator to terminate.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Leonid Rosenboim <lrosenboim@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8946/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: More OCTEONIII support
Chandrakala Chavva [Thu, 15 Jan 2015 13:11:17 +0000 (16:11 +0300)]
MIPS: OCTEON: More OCTEONIII support

Read clock rate from the correct CSR. Don't clear COP0_DCACHE for OCTEONIII.

Signed-off-by: Chandrakala Chavva <cchavva@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8945/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Remove setting of processor specific CVMCTL icache bits.
Chad Reese [Thu, 15 Jan 2015 13:11:16 +0000 (16:11 +0300)]
MIPS: OCTEON: Remove setting of processor specific CVMCTL icache bits.

CN38XX pass 1 required icache prefetching to be turned off. This chip never
reached production and is long dead. Other processor specific icache settings
are done by the bootloader. Remove these bits from the kernel.

Signed-off-by: Chad Reese <kreese@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/8944/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Core-15169 Workaround and general CVMSEG cleanup.
David Daney [Thu, 15 Jan 2015 13:11:15 +0000 (16:11 +0300)]
MIPS: OCTEON: Core-15169 Workaround and general CVMSEG cleanup.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8943/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Update octeon-model.h code for new SoCs.
David Daney [Thu, 15 Jan 2015 13:11:14 +0000 (16:11 +0300)]
MIPS: OCTEON: Update octeon-model.h code for new SoCs.

Add coverage for OCTEON III models.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8942/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Implement DCache errata workaround for all CN6XXX
David Daney [Thu, 15 Jan 2015 13:11:13 +0000 (16:11 +0300)]
MIPS: OCTEON: Implement DCache errata workaround for all CN6XXX

Make messages refer to all CN6XXX.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8941/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Add little-endian support to asm/octeon/octeon.h
David Daney [Thu, 15 Jan 2015 13:11:12 +0000 (16:11 +0300)]
MIPS: OCTEON: Add little-endian support to asm/octeon/octeon.h

Also update union octeon_cvmemctl with new OCTEON II fields.

[aleksey.makarov@auriga.com: use __BITFIELD_FIELD]

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8940/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Implement the core-16057 workaround
David Daney [Thu, 15 Jan 2015 13:11:10 +0000 (16:11 +0300)]
MIPS: OCTEON: Implement the core-16057 workaround

Disable ICache prefetch for certian Octeon II processors.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8938/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Delete unused COP2 saving code
Aleksey Makarov [Thu, 15 Jan 2015 13:11:09 +0000 (16:11 +0300)]
MIPS: OCTEON: Delete unused COP2 saving code

Commit 2c952e06e4f5 ("MIPS: Move cop2 save/restore to switch_to()")
removes assembler code to store COP2 registers.  Commit
a36d8225bceb ("MIPS: OCTEON: Enable use of FPU") mistakenly
restores it

Fixes: a36d8225bceb ("MIPS: OCTEON: Enable use of FPU")
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/8937/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Use correct instruction to read 64-bit COP0 register
Chandrakala Chavva [Thu, 15 Jan 2015 13:11:08 +0000 (16:11 +0300)]
MIPS: OCTEON: Use correct instruction to read 64-bit COP0 register

Use dmfc0/dmtc0 instructions for reading CvmMemCtl COP0 register,
its a 64-bit wide.

Signed-off-by: Chandrakala Chavva <cchavva@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/8936/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Save and restore CP2 SHA3 state
David Daney [Thu, 15 Jan 2015 13:11:07 +0000 (16:11 +0300)]
MIPS: OCTEON: Save and restore CP2 SHA3 state

Allocate new save space, and then save/restore the registers if
OCTEON III.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8935/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Fix FP context save.
David Daney [Thu, 15 Jan 2015 13:11:06 +0000 (16:11 +0300)]
MIPS: OCTEON: Fix FP context save.

It wasn't being saved on task switch.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8934/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: OCTEON: Save/Restore wider multiply registers in OCTEON III CPUs
David Daney [Thu, 15 Jan 2015 13:11:05 +0000 (16:11 +0300)]
MIPS: OCTEON: Save/Restore wider multiply registers in OCTEON III CPUs

The wide multiplier is twice as wide, so we need to save twice as much
state.  Detect the multiplier type (CPU type) at start up and install
model specific handlers.

[aleksey.makarov@auriga.com:
conflict resolution,
support for old compilers]

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Leonid Rosenboim <lrosenboim@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8933/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agothermal: exynos: fix: Check if data->tmu_read callback is present before read
Lukasz Majewski [Fri, 6 Feb 2015 13:07:10 +0000 (14:07 +0100)]
thermal: exynos: fix: Check if data->tmu_read callback is present before read

The exynos_tmu_data() function should on entrance test not only for valid
data pointer, but also for data->tmu_read one.
It is important, since afterwards it is dereferenced to get temperature code.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Tested-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
9 years agoMIPS: boot: Provide more uImage options
Markos Chandras [Mon, 16 Feb 2015 15:13:11 +0000 (15:13 +0000)]
MIPS: boot: Provide more uImage options

Allow more compression algorithms as well as uncompressed uImage.bin
to be generated. An uncompressed image might be useful to rule out
problems in the decompression code in the bootloader or even speed
up the boot process at the expense of a bigger uImage file.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9271/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Remove unneeded #ifdef __KERNEL__ from asm/processor.h
David Daney [Thu, 18 Dec 2014 10:59:53 +0000 (13:59 +0300)]
MIPS: Remove unneeded #ifdef __KERNEL__ from asm/processor.h

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8737/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: ip22-gio: Remove legacy suspend/resume support
Lars-Peter Clausen [Sun, 11 Jan 2015 16:06:56 +0000 (17:06 +0100)]
MIPS: ip22-gio: Remove legacy suspend/resume support

There are currently no gio device drivers that implement suspend/resume
and this patch removes the bus specific legacy suspend and resume callbacks.
This will allow us to eventually remove struct bus_type legacy suspend and
resume support altogether.

gio device drivers wanting to implement suspend and resume can use dev PM
ops which will work out of the box without further modifications necessary.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8920/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agomips: pci: Add ifdef around pci_proc_domain
Zubair Lutfullah Kakakhel [Fri, 12 Dec 2014 12:45:39 +0000 (12:45 +0000)]
mips: pci: Add ifdef around pci_proc_domain

Without these, there are multiple definitions of pci_proc_domain()
and pci_domain_nr() if linux/pci.h and asm/pci.h are included.

Add #ifdefs around them

Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Reviewed-by: Markos Chandras <Markos.Chandras@imgtec.com>
Cc: Markos.Chandras@imgtec.com
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8670/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Alchemy: Fix cpu clock calculation
Manuel Lauss [Wed, 18 Feb 2015 10:01:56 +0000 (11:01 +0100)]
MIPS: Alchemy: Fix cpu clock calculation

The current code uses bits 0-6 of the sys_cpupll register to calculate
core clock speed.  However this is only valid on Au1300, on all earlier
models the hardware only uses bits 0-5 to generate core clock.

This fixes clock calculation on the MTX1 (Au1500), where bit 6 of cpupll
is set as well, which ultimately lead the code to calculate a bogus cpu
core clock and also uart base clock down the line.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Reported-by: John Crispin <blogic@openwrt.org>
Tested-by: Bruno Randolf <br1@einfach.org>
Cc: stable@vger.kernel.org [v3.17+]
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/9279/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Alchemy: remove declaration for set_cpuspec
Manuel Lauss [Thu, 29 Jan 2015 15:06:44 +0000 (16:06 +0100)]
MIPS: Alchemy: remove declaration for set_cpuspec

set_cpuspec() has been dropped with commit 074cf656700ddd1d2bd7f815f78e785418beb898
("MIPS: Alchemy: remove cpu_table.") in late 2008.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/9150/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Alchemy: preset loops_per_jiffy based on CPU clock
Manuel Lauss [Thu, 29 Jan 2015 15:06:43 +0000 (16:06 +0100)]
MIPS: Alchemy: preset loops_per_jiffy based on CPU clock

This was lost during the rewrite of clock framework support.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/9149/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Alchemy: fix Au1000/Au1500 LRCLK calculation
Manuel Lauss [Thu, 29 Jan 2015 15:06:42 +0000 (16:06 +0100)]
MIPS: Alchemy: fix Au1000/Au1500 LRCLK calculation

The Au1000 and Au1500 calculate the LRCLK a bit differently than
newer models: a single bit in MEM_STCFG0 selects if pclk is divided
by 4 or 5.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/9148/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Add set/clear CP0 macros for PageGrain register
Steven J. Hill [Thu, 19 Feb 2015 16:18:52 +0000 (10:18 -0600)]
MIPS: Add set/clear CP0 macros for PageGrain register

Build set and clear macros for the PageGrain register.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9289/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoARM: 8305/1: DMA: Fix kzalloc flags in __iommu_alloc_buffer()
Alexandre Courbot [Thu, 19 Feb 2015 06:29:58 +0000 (07:29 +0100)]
ARM: 8305/1: DMA: Fix kzalloc flags in __iommu_alloc_buffer()

There doesn't seem to be any valid reason to allocate the pages array
with the same flags as the buffer itself. Doing so can eventually lead
to the following safeguard in mm/slab.c's cache_grow() to be hit:

        if (unlikely(flags & GFP_SLAB_BUG_MASK)) {
                pr_emerg("gfp: %un", flags & GFP_SLAB_BUG_MASK);
                BUG();
        }

This happens when buffers are allocated with __GFP_DMA32 or
__GFP_HIGHMEM.

Fix this by allocating the pages array with GFP_KERNEL to follow what is
done elsewhere in this file. Using GFP_KERNEL in __iommu_alloc_buffer()
is safe because atomic allocations are handled by __iommu_alloc_atomic().

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
9 years agoMerge branch 'overlayfs-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mszere...
Al Viro [Fri, 20 Feb 2015 09:58:52 +0000 (04:58 -0500)]
Merge branch 'overlayfs-next' of git://git./linux/kernel/git/mszeredi/vfs into for-next

9 years agoInfiniband: Fix potential NULL d_inode dereference
David Howells [Tue, 27 Jan 2015 15:01:18 +0000 (15:01 +0000)]
Infiniband: Fix potential NULL d_inode dereference

Code that does this:

if (!(d_unhashed(tmp) && tmp->d_inode)) {
...
simple_unlink(parent->d_inode, tmp);
}

is broken because:

!(d_unhashed(tmp) && tmp->d_inode)

is equivalent to:

!d_unhashed(tmp) || !tmp->d_inode

so it is possible to get into simple_unlink() with tmp->d_inode == NULL.

simple_unlink(), however, assumes tmp->d_inode cannot be NULL.

I think that what was meant is this:

!d_unhashed(tmp) && tmp->d_inode

and that the logical-not operator or the final close-bracket was misplaced.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Bryan O'Sullivan <bos@pathscale.com>
cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoposix_acl: fix reference leaks in posix_acl_create
Omar Sandoval [Mon, 9 Feb 2015 05:45:25 +0000 (21:45 -0800)]
posix_acl: fix reference leaks in posix_acl_create

get_acl gets a reference which we must release in the error cases.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoautofs4: Wrong format for printing dentry
Rasmus Villemoes [Fri, 6 Feb 2015 15:28:17 +0000 (16:28 +0100)]
autofs4: Wrong format for printing dentry

%pD for struct file*, %pd for struct dentry*.

Fixes: a455589f181e ("assorted conversions to %p[dD]")
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agocoredump: Fix typo in comment
Bastien Nocera [Thu, 5 Feb 2015 13:35:05 +0000 (14:35 +0100)]
coredump: Fix typo in comment

Signed-off-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agofs/aio.c: Remove duplicate function name in pr_debug messages
Kinglong Mee [Wed, 4 Feb 2015 13:15:59 +0000 (21:15 +0800)]
fs/aio.c: Remove duplicate function name in pr_debug messages

Have defined pr_fmt as below in fs/aio.c, so remove duplicate
function name in pr_debug message.

#define pr_fmt(fmt) "%s: " fmt, __func__

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoconfigfs: Fix potential NULL d_inode dereference
David Howells [Tue, 27 Jan 2015 15:18:39 +0000 (15:18 +0000)]
configfs: Fix potential NULL d_inode dereference

Code that does this:

if (!(d_unhashed(dentry) && dentry->d_inode)) {
...
simple_unlink(parent->d_inode, dentry);
}

is broken because:

    !(d_unhashed(dentry) && dentry->d_inode)

is equivalent to:

    !d_unhashed(dentry) || !dentry->d_inode

so it is possible to get into simple_unlink() with dentry->d_inode == NULL.

simple_unlink(), however, assumes dentry->d_inode cannot be NULL.

I think that what was meant is this:

    !d_unhashed(dentry) && dentry->d_inode

and that the logical-not operator or the final close-bracket was misplaced.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agohypfs: switch to read_iter/write_iter
Al Viro [Wed, 4 Feb 2015 21:17:45 +0000 (16:17 -0500)]
hypfs: switch to read_iter/write_iter

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agox86/mm/ASLR: Avoid PAGE_SIZE redefinition for UML subarch
Jiri Kosina [Fri, 20 Feb 2015 09:18:59 +0000 (10:18 +0100)]
x86/mm/ASLR: Avoid PAGE_SIZE redefinition for UML subarch

Commit f47233c2d34 ("x86/mm/ASLR: Propagate base load address
calculation") causes PAGE_SIZE redefinition warnings for UML
subarch  builds. This is caused by added includes that were
leftovers from previous  patch versions are are not actually
needed (especially page_types.h  inlcude in module.c). Drop
those stray includes.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: Borislav Petkov <bp@suse.de>
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Kees Cook <keescook@chromium.org>
Link: http://lkml.kernel.org/r/alpine.LNX.2.00.1502201017240.28769@pobox.suse.cz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agodon't bother with most of the bad_file_ops methods
Al Viro [Wed, 4 Feb 2015 21:02:09 +0000 (16:02 -0500)]
don't bother with most of the bad_file_ops methods

Only ->open() should be there (always failing, of course).  We never
replace ->f_op of an already opened struct file, so there's no way
for any of those methods to be called.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
9 years agoclk: Only recalculate the rate if needed
Tomeu Vizoso [Fri, 6 Feb 2015 14:13:01 +0000 (15:13 +0100)]
clk: Only recalculate the rate if needed

We don't really need to recalculate the effective rate of a clock when a
per-user clock is removed, if the constraints of the later aren't
limiting the requested rate.

This was causing problems with clocks that never had a rate set before,
as rate_req would be zero. Though this could be considered a bug in the
implementation of those clocks, this should be checked somewhere else.

Fixes: 1c8e600440c7 ("clk: Add rate constraints to clocks")
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
9 years agoipmi: Fix a memory ordering issue
Corey Minyard [Thu, 19 Feb 2015 14:25:49 +0000 (08:25 -0600)]
ipmi: Fix a memory ordering issue

From a locking point of view it is safe to check waiting_msg without
a lock, but there is a memory ordering issue that causes it to
possibly not be set right when viewed from another processor.  We are
already claiming a lock right after that, move the check to inside
the lock to enforce the memory ordering.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
9 years agoipmi: Remove uses of return value of seq_printf
Joe Perches [Tue, 17 Feb 2015 19:10:56 +0000 (11:10 -0800)]
ipmi: Remove uses of return value of seq_printf

The seq_printf like functions will soon be changed to return void.

Convert these uses to check seq_has_overflowed instead.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
9 years agoipmi: Use is_visible callback for conditional sysfs entries
Takashi Iwai [Wed, 4 Feb 2015 14:36:14 +0000 (15:36 +0100)]
ipmi: Use is_visible callback for conditional sysfs entries

Instead of manual calls of device_create_file() and
device_remove_file(), implement the condition in is_visible callback
for the attribute group and put these entries to the group, too.
This simplifies the code and avoids the possible races.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
9 years agoipmi: Free ipmi_recv_msg messages from the linked list on close
Nicholas Krause [Sat, 31 Jan 2015 05:17:54 +0000 (00:17 -0500)]
ipmi: Free ipmi_recv_msg messages from the linked list on close

This adds a loop through the elements in the linked list, recv_msgs using
list_for_entry_safe in order to free messages in this list.  In addition
we are using the safe version of this marco in order to prevent use after
bugs related to deleting the element we are on currently by holding a
pointer to the next element after the current one we are on and freeing
with the function, ipmi_free_recv_msg internally in this loop.

Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
9 years agoipmi: avoid gcc warning
Arnd Bergmann [Wed, 28 Jan 2015 15:00:11 +0000 (16:00 +0100)]
ipmi: avoid gcc warning

A new harmless warning has come up on ARM builds with gcc-4.9:

drivers/char/ipmi/ipmi_msghandler.c: In function 'smi_send.isra.11':
include/linux/spinlock.h:372:95: warning: 'flags' may be used uninitialized in this function [-Wmaybe-uninitialized]
  raw_spin_unlock_irqrestore(&lock->rlock, flags);
                                                                                               ^
drivers/char/ipmi/ipmi_msghandler.c:1490:16: note: 'flags' was declared here
  unsigned long flags;
                ^

This could be worked around by initializing the 'flags' variable, but it
seems better to rework the code to avoid this.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 7ea0ed2b5be81 ("ipmi: Make the message handler easier to use for SMI interfaces")
Signed-off-by: Corey Minyard <cminyard@mvista.com>
9 years agoipmi: Update timespec usage to timespec64
John Stultz [Wed, 7 Jan 2015 22:24:29 +0000 (14:24 -0800)]
ipmi: Update timespec usage to timespec64

As part of the internal y2038 cleanup, this patch removes
timespec usage in the ipmi driver, replacing it timespec64

Cc: openipmi-developer@lists.sourceforge.net
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Corey Minyard <minyard@mvista.com>
9 years agoipmi: Cleanup DEBUG_TIMING ifdef usage
John Stultz [Wed, 7 Jan 2015 22:24:28 +0000 (14:24 -0800)]
ipmi: Cleanup DEBUG_TIMING ifdef usage

The driver uses #ifdef DEBUG_TIMING in order to conditionally print out
timestamped debug messages. Unfortunately it adds the ifdefs all over the
usage sites.

This patch cleans it up by adding a debug_timestamp() function which
is compiled out if DEBUG_TIMING isn't present. This cleans up all
the ugly ifdefs in the function logic.

Cc: openipmi-developer@lists.sourceforge.net
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Corey Minyard <minyard@mvista.com>
9 years agodrivers:char:ipmi: Remove unneeded FIXME comment in the file,ipmi_si_intf.c
Nicholas Krause [Tue, 30 Dec 2014 02:54:27 +0000 (21:54 -0500)]
drivers:char:ipmi: Remove unneeded FIXME comment in the file,ipmi_si_intf.c

Removes a no longer needed FIXME comment in the function,acpi_gpe_irq_setup
for the file,ipmi_si_intf.c. This comment is no longer needed as clearly we
are passing the correct level of  ACPI_GPE_LEVEL_TRIGGERED to the installer
function,acpi_install_gpe_handler due to no breakage after years of using
this ACPI level in the function,acpi_install_gpe_handler.

Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
9 years agochar: ipmi: Remove obsolete cleanup for clientdata
Wolfram Sang [Mon, 22 Dec 2014 22:18:28 +0000 (23:18 +0100)]
char: ipmi: Remove obsolete cleanup for clientdata

A few new i2c-drivers came into the kernel which clear the clientdata-pointer
on exit or error. This is obsolete meanwhile, the core will do it.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
9 years agoipmi: Remove a FIXME for slab conversion
Corey Minyard [Wed, 17 Dec 2014 13:11:54 +0000 (07:11 -0600)]
ipmi: Remove a FIXME for slab conversion

There can't be more than a few IPMI messages allocated at any one time,
so converting the messages to slabs would be a waste.  So just remove
the FIXME.

Suggested-by: Nicholas Krause <xerofoify@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>
9 years agoMerge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
Linus Torvalds [Fri, 20 Feb 2015 01:51:22 +0000 (17:51 -0800)]
Merge branch 'fixes' of git://git./linux/kernel/git/evalenti/linux-soc-thermal

Pull more thermal managament updates from Zhang Rui:
 "Specifics:

   - Exynos thermal driver refactoring.  Several cleanups, code
     optimization, unused symbols removal, and unused feature removal in
     Exynos thermal driver.  Thanks Lukasz for this effort.

   - Exynos thermal driver support to OF thermal.  After the code
     refactoring, the driver earned the support to OF thermal.  Chip
     thermal data were moved from driver code to DTS, reducing the code
     footprint.  Thanks Lukasz for this.

   - After receiving the OF thermal support, the exynos thermal driver
     now must allow modular build.  Thanks Arnd for detecting, reporting
     and fixing this.

   - Exynos thermal driver support to Exynos 7 SoC.  Thanks Abhilash for
     this.

   - Accurate temperature reporting on Rockchip thermal driver, thanks
     to Caesar.

   - Fix on how OF thermal enables its zones, thanks Lukasz for fixing.

   - Fixes in OF thermal examples under Documentation/.  Thanks Srinivas
     for fixing"

* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
  thermal: exynos: Add TMU support for Exynos7 SoC
  dts: Documentation: Add documentation for Exynos7 SoC thermal bindings
  cpufreq: exynos: allow modular build
  thermal: Fix examples in DT documentation
  thermal: exynos: Correct sanity check at exynos_report_trigger() function
  thermal: Kconfig: Remove config for not used EXYNOS_THERMAL_CORE
  thermal: exynos: Remove exynos_tmu_data.c file
  thermal: rockchip: make temperature reporting much more accurate
  thermal: exynos: Remove exynos_thermal_common.[c|h] files
  thermal: samsung: core: Exynos TMU rework to use device tree for configuration
  dts: Documentation: Update exynos-thermal.txt example for Exynos5440
  dts: Documentation: Extending documentation entry for exynos-thermal
  cpufreq: exynos: Use device tree to determine if cpufreq cooling should be registered
  thermal: exynos: Modify exynos thermal code to use device tree for cpu cooling configuration
  thermal: exynos: Provide thermal_exynos.h file to be included in device tree files
  thermal: exynos: cosmetic: Correct comment format
  thermal: of: Enable thermal_zoneX when sensor is correctly added

9 years agoNVMe: Fix potential corruption on sync commands
Keith Busch [Thu, 19 Feb 2015 21:29:48 +0000 (14:29 -0700)]
NVMe: Fix potential corruption on sync commands

This makes all sync commands uninterruptible and schedules without timeout
so the controller either has to post a completion or the timeout recovery
fails the command. This fixes potential memory or data corruption from
a command timing out too early or woken by a signal. Previously any DMA
buffers mapped for that command would have been released even though we
don't know what the controller is planning to do with those addresses.

Signed-off-by: Keith Busch <keith.busch@intel.com>
9 years agoNVMe: Remove unused variables
Keith Busch [Thu, 19 Feb 2015 21:01:59 +0000 (14:01 -0700)]
NVMe: Remove unused variables

We don't track queues in a llist, subscribe to hot-cpu notifications,
or internally retry commands. Delete the unused artifacts.

Signed-off-by: Keith Busch <keith.busch@intel.com>
9 years agoNVMe: Fix scsi mode select llbaa setting
Keith Busch [Fri, 9 Jan 2015 23:52:08 +0000 (16:52 -0700)]
NVMe: Fix scsi mode select llbaa setting

It should be a logical bitwise AND, not conditional.

Signed-off-by: Keith Busch <keith.busch@intel.com>
9 years agoNVMe: Fix potential corruption during shutdown
Keith Busch [Thu, 19 Feb 2015 17:34:48 +0000 (10:34 -0700)]
NVMe: Fix potential corruption during shutdown

The driver has to end unreturned commands at some point even if the
controller has not provided a completion. The driver tried to be safe by
deleting IO queues prior to ending all unreturned commands. That should
cause the controller to internally abort inflight commands, but IO queue
deletion request does not have to be successful, so all bets are off. We
still have to make progress, so to be extra safe, this patch doesn't
clear a queue to release the dma mapping for a command until after the
pci device has been disabled.

This patch removes the special handling during device initialization
so controller recovery can be done all the time. This is possible since
initialization is not inlined with pci probe anymore.

Reported-by: Nilish Choudhury <nilesh.choudhury@oracle.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
9 years agoNVMe: Asynchronous controller probe
Keith Busch [Thu, 12 Feb 2015 22:33:00 +0000 (15:33 -0700)]
NVMe: Asynchronous controller probe

This performs the longest parts of nvme device probe in scheduled work.
This speeds up probe significantly when multiple devices are in use.

Signed-off-by: Keith Busch <keith.busch@intel.com>
9 years agoNVMe: Register management handle under nvme class
Keith Busch [Tue, 3 Feb 2015 18:21:42 +0000 (11:21 -0700)]
NVMe: Register management handle under nvme class

This creates a new class type for nvme devices to register their
management character devices with. This is so we do not rely on miscdev
to provide enough minors for as many nvme devices some people plan to
use. The previous limit was approximately 60 NVMe controllers, depending
on the platform and kernel. Now the limit is 1M, which ought to be enough
for anybody.

Since we have a new device class, it makes sense to attach the block
devices under this as well, so part of this patch moves the management
handle initialization prior to the namespaces discovery.

Signed-off-by: Keith Busch <keith.busch@intel.com>
9 years agoNVMe: Update SCSI Inquiry VPD 83h translation
Keith Busch [Thu, 19 Feb 2015 20:42:14 +0000 (13:42 -0700)]
NVMe: Update SCSI Inquiry VPD 83h translation

The original translation created collisions on Inquiry VPD 83 for many
existing devices. Newer specifications provide other ways to translate
based on the device's version can be used to create unique identifiers.

Version 1.1 provides an EUI64 field that uniquely identifies each
namespace, and 1.2 added the longer NGUID field for the same reason.
Both follow the IEEE EUI format and readily translate to the SCSI device
identification EUI designator type 2h. For devices implementing either,
the translation will use this type, defaulting to the EUI64 8-byte type if
implemented then NGUID's 16 byte version if not. If neither are provided,
the 1.0 translation is used, and is updated to use the SCSI String format
to guarantee a unique identifier.

Knowing when to use the new fields depends on the nvme controller's
revision. The NVME_VS macro was not decoding this correctly, so that is
fixed in this patch and moved to a more appropriate place.

Since the Identify Namespace structure required an update for the NGUID
field, this patch adds the remaining new 1.2 fields to the structure.

Signed-off-by: Keith Busch <keith.busch@intel.com>
9 years agoNVMe: Metadata format support
Keith Busch [Thu, 19 Feb 2015 20:39:03 +0000 (13:39 -0700)]
NVMe: Metadata format support

Adds support for NVMe metadata formats and exposes block devices for
all namespaces regardless of their format. Namespace formats that are
unusable will have disk capacity set to 0, but a handle to the block
device is created to simplify device management. A namespace is not
usable when the format requires host interleave block and metadata in
single buffer, has no provisioned storage, or has better data but failed
to register with blk integrity.

The namespace has to be scanned in two phases to support separate
metadata formats. The first establishes the sector size and capacity
prior to invoking add_disk. If metadata is required, the capacity will
be temporarilly set to 0 until it can be revalidated and registered with
the integrity extenstions after add_disk completes.

The driver relies on the integrity extensions to provide the metadata
buffer. NVMe requires this be a single physically contiguous region,
so only one integrity segment is allowed per command. If the metadata
is used for T10 PI, the driver provides mappings to save and restore
the reftag physical block translation. The driver provides no-op
functions for generate and verify if metadata is not used for protection
information. This way the setup is always provided by the block layer.

If a request does not supply a required metadata buffer, the command
is failed with bad address. This could only happen if a user manually
disables verify/generate on such a disk. The only exception to where
this is okay is if the controller is capable of stripping/generating
the metadata, which is possible on some types of formats.

The metadata scatter gather list now occupies the spot in the nvme_iod
that used to be used to link retryable IOD's, but we don't do that
anymore, so the field was unused.

Signed-off-by: Keith Busch <keith.busch@intel.com>
9 years agox86: pte_protnone() and pmd_protnone() must check entry is not present
David Vrabel [Thu, 19 Feb 2015 13:06:53 +0000 (13:06 +0000)]
x86: pte_protnone() and pmd_protnone() must check entry is not present

Since _PAGE_PROTNONE aliases _PAGE_GLOBAL it is only valid if
_PAGE_PRESENT is clear.  Make pte_protnone() and pmd_protnone() check
for this.

This fixes a 64-bit Xen PV guest regression introduced by 8a0516ed8b90
("mm: convert p[te|md]_numa users to p[te|md]_protnone_numa").  Any
userspace process would endlessly fault.

In a 64-bit PV guest, userspace page table entries have _PAGE_GLOBAL set
by the hypervisor.  This meant that any fault on a present userspace
entry (e.g., a write to a read-only mapping) would be misinterpreted as
a NUMA hinting fault and the fault would not be correctly handled,
resulting in the access endlessly faulting.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
9 years agocpuidle: powernv: Avoid endianness conversions while parsing DT
Preeti U Murthy [Thu, 19 Feb 2015 05:24:53 +0000 (23:24 -0600)]
cpuidle: powernv: Avoid endianness conversions while parsing DT

We currently read the information about idle states from the DT
so as to populate the cpuidle table. Use those APIs to read from
the DT that can avoid endianness conversions of the property values
in the cpuidle driver.

Signed-off-by: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux...
Linus Torvalds [Thu, 19 Feb 2015 22:36:00 +0000 (14:36 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs

Pull btrfs updates from Chris Mason:
 "This pull is mostly cleanups and fixes:

   - The raid5/6 cleanups from Zhao Lei fixup some long standing warts
     in the code and add improvements on top of the scrubbing support
     from 3.19.

   - Josef has round one of our ENOSPC fixes coming from large btrfs
     clusters here at FB.

   - Dave Sterba continues a long series of cleanups (thanks Dave), and
     Filipe continues hammering on corner cases in fsync and others

  This all was held up a little trying to track down a use-after-free in
  btrfs raid5/6.  It's not clear yet if this is just made easier to
  trigger with this pull or if its a new bug from the raid5/6 cleanups.
  Dave Sterba is the only one to trigger it so far, but he has a
  consistent way to reproduce, so we'll get it nailed shortly"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (68 commits)
  Btrfs: don't remove extents and xattrs when logging new names
  Btrfs: fix fsync data loss after adding hard link to inode
  Btrfs: fix BUG_ON in btrfs_orphan_add() when delete unused block group
  Btrfs: account for large extents with enospc
  Btrfs: don't set and clear delalloc for O_DIRECT writes
  Btrfs: only adjust outstanding_extents when we do a short write
  btrfs: Fix out-of-space bug
  Btrfs: scrub, fix sleep in atomic context
  Btrfs: fix scheduler warning when syncing log
  Btrfs: Remove unnecessary placeholder in btrfs_err_code
  btrfs: cleanup init for list in free-space-cache
  btrfs: delete chunk allocation attemp when setting block group ro
  btrfs: clear bio reference after submit_one_bio()
  Btrfs: fix scrub race leading to use-after-free
  Btrfs: add missing cleanup on sysfs init failure
  Btrfs: fix race between transaction commit and empty block group removal
  btrfs: add more checks to btrfs_read_sys_array
  btrfs: cleanup, rename a few variables in btrfs_read_sys_array
  btrfs: add checks for sys_chunk_array sizes
  btrfs: more superblock checks, lower bounds on devices and sectorsize/nodesize
  ...

9 years agoMerge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
Linus Torvalds [Thu, 19 Feb 2015 22:14:42 +0000 (14:14 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/sage/ceph-client

Pull Ceph changes from Sage Weil:
 "On the RBD side, there is a conversion to blk-mq from Christoph,
  several long-standing bug fixes from Ilya, and some cleanup from
  Rickard Strandqvist.

  On the CephFS side there is a long list of fixes from Zheng, including
  improved session handling, a few IO path fixes, some dcache management
  correctness fixes, and several blocking while !TASK_RUNNING fixes.

  The core code gets a few cleanups and Chaitanya has added support for
  TCP_NODELAY (which has been used on the server side for ages but we
  somehow missed on the kernel client).

  There is also an update to MAINTAINERS to fix up some email addresses
  and reflect that Ilya and Zheng are doing most of the maintenance for
  RBD and CephFS these days.  Do not be surprised to see a pull request
  come from one of them in the future if I am unavailable for some
  reason"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (27 commits)
  MAINTAINERS: update Ceph and RBD maintainers
  libceph: kfree() in put_osd() shouldn't depend on authorizer
  libceph: fix double __remove_osd() problem
  rbd: convert to blk-mq
  ceph: return error for traceless reply race
  ceph: fix dentry leaks
  ceph: re-send requests when MDS enters reconnecting stage
  ceph: show nocephx_require_signatures and notcp_nodelay options
  libceph: tcp_nodelay support
  rbd: do not treat standalone as flatten
  ceph: fix atomic_open snapdir
  ceph: properly mark empty directory as complete
  client: include kernel version in client metadata
  ceph: provide seperate {inode,file}_operations for snapdir
  ceph: fix request time stamp encoding
  ceph: fix reading inline data when i_size > PAGE_SIZE
  ceph: avoid block operation when !TASK_RUNNING (ceph_mdsc_close_sessions)
  ceph: avoid block operation when !TASK_RUNNING (ceph_get_caps)
  ceph: avoid block operation when !TASK_RUNNING (ceph_mdsc_sync)
  rbd: fix error paths in rbd_dev_refresh()
  ...

9 years agoMIPS: Usage and cosmetic cleanups of page table bits.
Steven J. Hill [Thu, 19 Feb 2015 16:18:50 +0000 (10:18 -0600)]
MIPS: Usage and cosmetic cleanups of page table bits.

* Clean up white spaces and tabs.
   * Get rid of remaining hardcoded values for calculating
     shifts and masks.
   * Get rid of redundant macro values.
   * Do not use page table bits directly in #ifdef's.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9287/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMerge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux
Linus Torvalds [Thu, 19 Feb 2015 19:28:36 +0000 (11:28 -0800)]
Merge branch 'next' of git://git./linux/kernel/git/rzhang/linux

Pull thermal managament updates from Zhang Rui:
 "Specifics:

   - Abstract the code and introduce helper functions for all int340x
     thermal drivers.  From: Srinivas Pandruvada.

   - Reorganize the ACPI LPAT table support code so that it can be
     shared for both ACPI PMIC driver and int340x thermal driver.

   - Add support for Braswell in intel_soc_dts thermal driver.

   - a couple of small fixes/cleanups for step_wise governor and int340x
     thermal driver"

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  Thermal/int340x_thermal: remove unused uuids.
  thermal: step_wise: spelling fixes
  thermal: int340x: fix sparse warning
  Thermal/int340x: LPAT conversion for temperature
  ACPI / PMIC: Use common LPAT table handling functions
  ACPI / LPAT: Common table processing functions
  thermal: Intel SoC DTS: Add Braswell support
  Thermal/int340x/int3402: Provide notification support
  Thermal/int340x/processor_thermal: Add thermal zone support
  Thermal/int340x/int3403: Use int340x thermal API
  Thermal/int340x/int3402: Use int340x thermal API
  Thermal/int340x: Add common thermal zone handler

9 years agoMerge tag 'edac_fixes_for_3.20' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 19 Feb 2015 19:18:14 +0000 (11:18 -0800)]
Merge tag 'edac_fixes_for_3.20' of git://git./linux/kernel/git/bp/bp

Pull two EDAC fixes from Borislav Petkov:

 - A fix to sb_edac for proper detection on SNB machines

 - A fix to amd64_edac to not explode on Numascale machines with more
   than 16 memory controllers, from Daniel J Blueman.

* tag 'edac_fixes_for_3.20' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  EDAC, amd64_edac: Prevent OOPS with >16 memory controllers
  sb_edac: Fix detection on SNB machines

9 years agoMerge tag 'platform-drivers-x86-v3.20-1' of git://git.infradead.org/users/dvhart...
Linus Torvalds [Thu, 19 Feb 2015 18:56:51 +0000 (10:56 -0800)]
Merge tag 'platform-drivers-x86-v3.20-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86

Pull platform driver update from Darren Hart:
 "This includes a significant update to the toshiba_acpi driver,
  bringing it to feature parity with the Windows driver, followed by
  some needed cleanups.

  The other changes are mostly minor updates, quirks, sparse fixes, or
  cleanups.

  Details:

   - toshiba_acpi:
       Add support for missing features from the Windows driver, bump the
       sysfs version, and clean up the driver.

   - thinkpad_acpi:
       BIOS string versions, unhandled hkey events.

   - msamsung-laptop:
       Add native backlight quirk, enable better lid handling.

   - intel_scu_ipc:
       Read resources from PCI configuration

   - other:
       Fix sparse warnings, general cleanups"

* tag 'platform-drivers-x86-v3.20-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: (34 commits)
  toshiba_acpi: Cleanup GPL header
  toshiba_acpi: Cleanup comment blocks and capitalization
  toshiba_acpi: Make use of DEVICE_ATTR_{RO, RW} macros
  toshiba_acpi: Drop the toshiba_ prefix from sysfs function names
  toshiba_acpi: Move sysfs function and struct declarations further down
  Documentation/ABI: Add file describing the sysfs entries for toshiba_acpi
  toshiba_acpi: Clean file according to coding style
  toshiba_acpi: Bump version number to 0.21
  toshiba_acpi: Add support to enable/disable USB 3
  toshiba_acpi: Add support for Panel Power ON
  toshiba_acpi: Add support for Keyboard functions mode
  toshiba_acpi: Add fan entry to sysfs
  toshiba_acpi: Add version entry to sysfs
  thinkpad_acpi: support new BIOS version string pattern
  thinkpad_acpi: unhandled hkey event
  toshiba_acpi: Make toshiba_eco_mode_available more robust
  classmate-laptop: Fix sparse warning (0 as NULL)
  Sony-laptop: Fix sparse warning (make undeclared var static)
  thinkpad_acpi.c: Fix sparse warning (make undeclared var static)
  samsung-laptop.c: Prefer kstrtoint over single variable sscanf
  ...

9 years agokgdb, docs: Fix <para> pdfdocs build errors
Rajaneesh Acharya [Wed, 31 Dec 2014 17:43:19 +0000 (17:43 +0000)]
kgdb, docs: Fix <para> pdfdocs build errors

kgdb.pdf failed to build from 'make pdfdocs' giving errors such as:

jade:... Documentation/DocBook/kgdb.xml:200:8:E:
document type does not allow element "para" here; missing one of
"footnote", "caution", "important", "note", "tip", "warning",
"blockquote", "informalexample" start-tag

Fixing minor <para> and <sect> issues allows kgdb.pdf to be generated
under Fedora20.

Originally submitted by rajaneesh.acharya@yahoo.com in 2011, discussed here:
http://permalink.gmane.org/gmane.linux.documentation/3954
as patch:
 The following are the enhancements that removed the errors
 while issuing "make pdfdocs"

[graham.whaley@intel.com: Improved commit message and ported to 3.18.1]
Signed-off-by: Graham Whaley <graham.whaley@intel.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
9 years agodebug: prevent entering debug mode on panic/exception.
Colin Cross [Wed, 28 Jan 2015 11:32:14 +0000 (17:02 +0530)]
debug: prevent entering debug mode on panic/exception.

On non-developer devices, kgdb prevents the device from rebooting
after a panic.

Incase of panics and exceptions, to allow the device to reboot, prevent
entering debug mode to avoid getting stuck waiting for the user to
interact with debugger.

To avoid entering the debugger on panic/exception without any extra
configuration, panic_timeout is being used which can be set via
/proc/sys/kernel/panic at run time and CONFIG_PANIC_TIMEOUT sets the
default value.

Setting panic_timeout indicates that the user requested machine to
perform unattended reboot after panic. We dont want to get stuck waiting
for the user input incase of panic.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: kgdb-bugreport@lists.sourceforge.net
Cc: linux-kernel@vger.kernel.org
Cc: Android Kernel Team <kernel-team@android.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Signed-off-by: Colin Cross <ccross@android.com>
[Kiran: Added context to commit message.
panic_timeout is used instead of break_on_panic and
break_on_exception to honor CONFIG_PANIC_TIMEOUT
Modified the commit as per community feedback]
Signed-off-by: Kiran Raparthy <kiran.kumar@linaro.org>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
9 years agokdb: Const qualifier for kdb_getstr's prompt argument
Daniel Thompson [Thu, 11 Sep 2014 09:41:12 +0000 (10:41 +0100)]
kdb: Const qualifier for kdb_getstr's prompt argument

All current callers of kdb_getstr() can pass constant pointers via the
prompt argument. This patch adds a const qualification to make explicit
the fact that this is safe.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
9 years agokdb: Provide forward search at more prompt
Daniel Thompson [Thu, 11 Sep 2014 09:37:10 +0000 (10:37 +0100)]
kdb: Provide forward search at more prompt

Currently kdb allows the output of comamnds to be filtered using the
| grep feature. This is useful but does not permit the output emitted
shortly after a string match to be examined without wading through the
entire unfiltered output of the command. Such a feature is particularly
useful to navigate function traces because these traces often have a
useful trigger string *before* the point of interest.

This patch reuses the existing filtering logic to introduce a simple
forward search to kdb that can be triggered from the more prompt.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
9 years agokdb: Fix a prompt management bug when using | grep
Daniel Thompson [Thu, 11 Sep 2014 08:58:29 +0000 (09:58 +0100)]
kdb: Fix a prompt management bug when using | grep

Currently when the "| grep" feature is used to filter the output of a
command then the prompt is not displayed for the subsequent command.
Likewise any characters typed by the user are also not echoed to the
display. This rather disconcerting problem eventually corrects itself
when the user presses Enter and the kdb_grepping_flag is cleared as
kdb_parse() tries to make sense of whatever they typed.

This patch resolves the problem by moving the clearing of this flag
from the middle of command processing to the beginning.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
9 years agokdb: Remove stack dump when entering kgdb due to NMI
Daniel Thompson [Thu, 6 Nov 2014 15:32:13 +0000 (15:32 +0000)]
kdb: Remove stack dump when entering kgdb due to NMI

Issuing a stack dump feels ergonomically wrong when entering due to NMI.

Entering due to NMI is normally a reaction to a user request, either the
NMI button on a server or a "magic knock" on a UART. Therefore the
backtrace behaviour on entry due to NMI should be like SysRq-g (no stack
dump) rather than like oops.

Note also that the stack dump does not offer any information that
cannot be trivial retrieved using the 'bt' command.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
9 years agokdb: Avoid printing KERN_ levels to consoles
Daniel Thompson [Fri, 7 Nov 2014 18:37:57 +0000 (18:37 +0000)]
kdb: Avoid printing KERN_ levels to consoles

Currently when kdb traps printk messages then the raw log level prefix
(consisting of '\001' followed by a numeral) does not get stripped off
before the message is issued to the various I/O handlers supported by
kdb. This causes annoying visual noise as well as causing problems
grepping for ^. It is also a change of behaviour compared to normal usage
of printk() usage. For example <SysRq>-h ends up with different output to
that of kdb's "sr h".

This patch addresses the problem by stripping log levels from messages
before they are issued to the I/O handlers. printk() which can also
act as an i/o handler in some cases is special cased; if the caller
provided a log level then the prefix will be preserved when sent to
printk().

The addition of non-printable characters to the output of kdb commands is a
regression, albeit and extremely elderly one, introduced by commit
04d2c8c83d0e ("printk: convert the format for KERN_<LEVEL> to a 2 byte
pattern"). Note also that this patch does *not* restore the original
behaviour from v3.5. Instead it makes printk() from within a kdb command
display the message without any prefix (i.e. like printk() normally does).

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Joe Perches <joe@perches.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
9 years agokdb: Fix off by one error in kdb_cpu()
Jason Wessel [Thu, 8 Jan 2015 21:46:55 +0000 (15:46 -0600)]
kdb: Fix off by one error in kdb_cpu()

There was a follow on replacement patch against the prior
"kgdb: Timeout if secondary CPUs ignore the roundup".

See: https://lkml.org/lkml/2015/1/7/442

This patch is the delta vs the patch that was committed upstream:
  * Fix an off-by-one error in kdb_cpu().
  * Replace NR_CPUS with CONFIG_NR_CPUS to tell checkpatch that we
    really want a static limit.
  * Removed the "KGDB: " prefix from the pr_crit() in debug_core.c
    (kgdb-next contains a patch which introduced pr_fmt() to this file
    to the tag will now be applied automatically).

Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
9 years agokdb: fix incorrect counts in KDB summary command output
Jay Lan [Mon, 29 Sep 2014 22:36:57 +0000 (15:36 -0700)]
kdb: fix incorrect counts in KDB summary command output

The output of KDB 'summary' command should report MemTotal, MemFree
and Buffers output in kB. Current codes report in unit of pages.

A define of K(x) as
is defined in the code, but not used.

This patch would apply the define to convert the values to kB.
Please include me on Cc on replies. I do not subscribe to linux-kernel.

Signed-off-by: Jay Lan <jlan@sgi.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
9 years agoMerge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Thu, 19 Feb 2015 18:36:45 +0000 (10:36 -0800)]
Merge branch 'kconfig' of git://git./linux/kernel/git/mmarek/kbuild

Pull kconfig updates from Michal Marek:
 "Yann E Morin was supposed to take over kconfig maintainership, but
  this hasn't happened.  So I'm sending a few kconfig patches that I
  collected:

   - Fix for missing va_end in kconfig
   - merge_config.sh displays used if given too few arguments
   - s/boolean/bool/ in Kconfig files for consistency, with the plan to
     only support bool in the future"

* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kconfig: use va_end to match corresponding va_start
  merge_config.sh: Display usage if given too few arguments
  kconfig: use bool instead of boolean for type definition attributes

9 years agoMerge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Thu, 19 Feb 2015 18:31:37 +0000 (10:31 -0800)]
Merge branch 'misc' of git://git./linux/kernel/git/mmarek/kbuild

Pull misc kbuild changes from Michal Marek:
 "Just a few non-critical kbuild changes:

   - builddeb adds the actual distribution name in the changelog
   - documentation fixes"

* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kbuild: trivial - fix the help doc of CONFIG_CC_OPTIMIZE_FOR_SIZE
  kbuild: Update documentation of clean-files and clean-dirs
  builddeb: Try to determine distribution
  builddeb: Update year and git repository URL in debian/copyright

9 years agoMAINTAINERS: update Ceph and RBD maintainers
Sage Weil [Thu, 19 Feb 2015 18:10:40 +0000 (10:10 -0800)]
MAINTAINERS: update Ceph and RBD maintainers

- add Ilya, drop Yehuda as an RBD maintainer
- add Zheng as a Ceph maintainer
- update Yehuda and Sage's emails

Signed-off-by: Sage Weil <sage@redhat.com>
9 years agoMerge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
Linus Torvalds [Thu, 19 Feb 2015 18:07:08 +0000 (10:07 -0800)]
Merge branch 'kbuild' of git://git./linux/kernel/git/mmarek/kbuild

Pull kbuild updates from Michal Marek:

 - several cleanups in kbuild

 - serialize multiple *config targets so that 'make defconfig kvmconfig'
   works

 - The cc-ifversion macro got support for an else-branch

* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
  kbuild,gcov: simplify kernel/gcov/Makefile more
  kbuild: allow cc-ifversion to have the argument for false condition
  kbuild,gcov: simplify kernel/gcov/Makefile
  kbuild,gcov: remove unnecessary workaround
  kbuild: do not add $(call ...) to invoke cc-version or cc-fullversion
  kbuild: fix cc-ifversion macro
  kbuild: drop $(version_h) from MRPROPER_FILES
  kbuild: use mixed-targets when two or more config targets are given
  kbuild: remove redundant line from bounds.h/asm-offsets.h
  kbuild: merge bounds.h and asm-offsets.h rules
  kbuild: Drop support for clean-rule

9 years agos390/spinlock: disabled compare-and-delay by default
Martin Schwidefsky [Thu, 19 Feb 2015 16:53:16 +0000 (17:53 +0100)]
s390/spinlock: disabled compare-and-delay by default

Until we have hard performance data about the effects of CAD in the
spinlock loop disable the instruction by default.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
9 years agoi2c: designware-baytrail: another fixup for proper Kconfig dependencies
Wolfram Sang [Thu, 19 Feb 2015 16:02:59 +0000 (17:02 +0100)]
i2c: designware-baytrail: another fixup for proper Kconfig dependencies

IOSF_MBI is tristate. Baytrail driver isn't.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
9 years agoi2c: fix reference to functionality constants definition
Baruch Siach [Thu, 19 Feb 2015 10:51:30 +0000 (12:51 +0200)]
i2c: fix reference to functionality constants definition

Since commit 607ca46e97 ('UAPI: (Scripted) Disintegrate include/linux') the
list of functionality constants moved to include/uapi/linux/i2c.h. Update the
reference accordingly.

Fixes: 607ca46e97 ('UAPI: (Scripted) Disintegrate include/linux')
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
9 years agoMerge branch 'mipsr6-for-3.20' of git://git.linux-mips.org/pub/scm/mchandras/linux...
Ralf Baechle [Thu, 19 Feb 2015 15:00:34 +0000 (16:00 +0100)]
Merge branch 'mipsr6-for-3.20' of git://git.linux-mips.org/mchandras/linux into mips-for-linux-next

9 years agoMIPS: Export MSA functions used by lose_fpu(1) for KVM
James Hogan [Tue, 10 Feb 2015 10:03:00 +0000 (10:03 +0000)]
MIPS: Export MSA functions used by lose_fpu(1) for KVM

Export the _save_msa asm function used by the lose_fpu(1) macro to GPL
modules so that KVM can make use of it when it is built as a module.

This fixes the following build error when CONFIG_KVM=m and
CONFIG_CPU_HAS_MSA=y due to commit f798217dfd03 ("KVM: MIPS: Don't leak
FPU/DSP to guest"):

ERROR: "_save_msa" [arch/mips/kvm/kvm.ko] undefined!

Fixes: f798217dfd03 (KVM: MIPS: Don't leak FPU/DSP to guest)
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.15+
Patchwork: https://patchwork.linux-mips.org/patch/9261/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Export FP functions used by lose_fpu(1) for KVM
James Hogan [Tue, 10 Feb 2015 10:02:59 +0000 (10:02 +0000)]
MIPS: Export FP functions used by lose_fpu(1) for KVM

Export the _save_fp asm function used by the lose_fpu(1) macro to GPL
modules so that KVM can make use of it when it is built as a module.

This fixes the following build error when CONFIG_KVM=m due to commit
f798217dfd03 ("KVM: MIPS: Don't leak FPU/DSP to guest"):

ERROR: "_save_fp" [arch/mips/kvm/kvm.ko] undefined!

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Fixes: f798217dfd03 (KVM: MIPS: Don't leak FPU/DSP to guest)
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.10+
Patchwork: https://patchwork.linux-mips.org/patch/9260/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: BCM3384: Fix outdated use of mips_cpu_intc_init()
Kevin Cernekee [Thu, 25 Dec 2014 17:48:56 +0000 (09:48 -0800)]
MIPS: BCM3384: Fix outdated use of mips_cpu_intc_init()

This function was renamed to mips_cpu_irq_of_init(), so fix it to avoid
a compile error.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: f.fainelli@gmail.com
Cc: jaedon.shin@gmail.com
Cc: abrestic@chromium.org
Cc: tglx@linutronix.de
Cc: jason@lakedaemon.net
Cc: jogo@openwrt.org
Cc: arnd@arndb.de
Cc: computersforpeace@gmail.com
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8834/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Provide correct siginfo_t.si_stime
Petr Malat [Fri, 12 Dec 2014 14:28:01 +0000 (15:28 +0100)]
MIPS: Provide correct siginfo_t.si_stime

Provide correct siginfo_t.si_stime on MIPS64

Bug description:
MIPS version of copy_siginfo() is not aware of alignment on platforms with
64-bit long integers, which leads to an incorrect si_stime passed to signal
handlers, because the last element (si_stime) of _sifields._sigchld is not
copied. If _MIPS_SZLONG is 64, then the _sifields starts at the offset of
4 * sizeof(int).

Patch description:
Use the generic copy_siginfo, which doesn't have this problem.

Signed-off-by: Petr Malat <oss@malat.biz>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8671/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Makefile: Move the ASEs checks after setting the core's CFLAGS
Markos Chandras [Mon, 2 Feb 2015 15:41:01 +0000 (15:41 +0000)]
MIPS: Makefile: Move the ASEs checks after setting the core's CFLAGS

We need to check the ASEs support against the core's CFLAGS instead
of depending to the default -march option from the toolchain.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9180/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMIPS: Makefile: Pass -march option on Loongson3A cores
Ralf Baechle [Thu, 19 Feb 2015 12:47:20 +0000 (13:47 +0100)]
MIPS: Makefile: Pass -march option on Loongson3A cores

The loongson 3A cores do not select a suitable -march option so the build
system uses the default one from the toolchain. This may or may not be
suitable for a loongson 3A build. In order to avoid that, we explicitly set
a suitable -march option for that core.  Furthermore, some very old
compilers don't support -march= at all and there is the possibility of
toolchain combinations such as GCC 4.9 and binutils 2.24 for which
-march=loongson3a will result in MIPS64 R2 code being generated but then
rejected by GAS.  So treat the Longsoon 3A as an R2 CPU.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
9 years agoMerge tag 'microcode_fixes_for-3.21' of git://git.kernel.org/pub/scm/linux/kernel...
Ingo Molnar [Thu, 19 Feb 2015 12:32:42 +0000 (13:32 +0100)]
Merge tag 'microcode_fixes_for-3.21' of git://git./linux/kernel/git/bp/bp into x86/urgent

Pull microcode fixes from Borislav Petkov:

  - Two fixes hardening microcode data handling. (Quentin Casasnovas)

Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agox86/microcode/intel: Handle truncated microcode images more robustly
Quentin Casasnovas [Tue, 3 Feb 2015 12:00:24 +0000 (13:00 +0100)]
x86/microcode/intel: Handle truncated microcode images more robustly

We do not check the input data bounds containing the microcode before
copying a struct microcode_intel_header from it. A specially crafted
microcode could cause the kernel to read invalid memory and lead to a
denial-of-service.

Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1422964824-22056-3-git-send-email-quentin.casasnovas@oracle.com
[ Made error message differ from the next one and flipped comparison. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
9 years agox86/microcode/intel: Guard against stack overflow in the loader
Quentin Casasnovas [Tue, 3 Feb 2015 12:00:22 +0000 (13:00 +0100)]
x86/microcode/intel: Guard against stack overflow in the loader

mc_saved_tmp is a static array allocated on the stack, we need to make
sure mc_saved_count stays within its bounds, otherwise we're overflowing
the stack in _save_mc(). A specially crafted microcode header could lead
to a kernel crash or potentially kernel execution.

Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1422964824-22056-1-git-send-email-quentin.casasnovas@oracle.com
Signed-off-by: Borislav Petkov <bp@suse.de>
9 years agoMerge branch 'tip-x86-kaslr' of git://git.kernel.org/pub/scm/linux/kernel/git/bp...
Ingo Molnar [Thu, 19 Feb 2015 11:06:04 +0000 (12:06 +0100)]
Merge branch 'tip-x86-kaslr' of git://git./linux/kernel/git/bp/bp into x86/urgent

Pull ASLR and kASLR fixes from Borislav Petkov:

  - Add a global flag announcing KASLR state so that relevant code can do
    informed decisions based on its setting. (Jiri Kosina)

  - Fix a stack randomization entropy decrease bug. (Hector Marco-Gisbert)

Signed-off-by: Ingo Molnar <mingo@kernel.org>
9 years agolibceph: kfree() in put_osd() shouldn't depend on authorizer
Ilya Dryomov [Mon, 16 Feb 2015 08:49:42 +0000 (11:49 +0300)]
libceph: kfree() in put_osd() shouldn't depend on authorizer

a255651d4cad ("ceph: ensure auth ops are defined before use") made
kfree() in put_osd() conditional on the authorizer.  A mechanical
mistake most likely - fix it.

Cc: Alex Elder <elder@linaro.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agolibceph: fix double __remove_osd() problem
Ilya Dryomov [Tue, 17 Feb 2015 16:37:15 +0000 (19:37 +0300)]
libceph: fix double __remove_osd() problem

It turns out it's possible to get __remove_osd() called twice on the
same OSD.  That doesn't sit well with rb_erase() - depending on the
shape of the tree we can get a NULL dereference, a soft lockup or
a random crash at some point in the future as we end up touching freed
memory.  One scenario that I was able to reproduce is as follows:

            <osd3 is idle, on the osd lru list>
<con reset - osd3>
con_fault_finish()
  osd_reset()
                              <osdmap - osd3 down>
                              ceph_osdc_handle_map()
                                <takes map_sem>
                                kick_requests()
                                  <takes request_mutex>
                                  reset_changed_osds()
                                    __reset_osd()
                                      __remove_osd()
                                  <releases request_mutex>
                                <releases map_sem>
    <takes map_sem>
    <takes request_mutex>
    __kick_osd_requests()
      __reset_osd()
        __remove_osd() <-- !!!

A case can be made that osd refcounting is imperfect and reworking it
would be a proper resolution, but for now Sage and I decided to fix
this by adding a safe guard around __remove_osd().

Fixes: http://tracker.ceph.com/issues/8087

Cc: Sage Weil <sage@redhat.com>
Cc: stable@vger.kernel.org # 3.9+: 7c6e6fc53e73: libceph: assert both regular and lingering lists in __remove_osd()
Cc: stable@vger.kernel.org # 3.9+: cc9f1f518cec: libceph: change from BUG to WARN for __remove_osd() asserts
Cc: stable@vger.kernel.org # 3.9+
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Reviewed-by: Alex Elder <elder@linaro.org>
9 years agorbd: convert to blk-mq
Christoph Hellwig [Tue, 13 Jan 2015 16:20:04 +0000 (17:20 +0100)]
rbd: convert to blk-mq

This converts the rbd driver to use the blk-mq infrastructure.  Except
for switching to a per-request work item this is almost mechanical.

This was tested by Alexandre DERUMIER in November, and found to give
him 120000 iops, although the only comparism available was an old
3.10 kernel which gave 80000iops.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <elder@linaro.org>
[idryomov@gmail.com: context, blk_mq_init_queue() EH]
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
9 years agox86, mm/ASLR: Fix stack randomization on 64-bit systems
Hector Marco-Gisbert [Sat, 14 Feb 2015 17:33:50 +0000 (09:33 -0800)]
x86, mm/ASLR: Fix stack randomization on 64-bit systems

The issue is that the stack for processes is not properly randomized on
64 bit architectures due to an integer overflow.

The affected function is randomize_stack_top() in file
"fs/binfmt_elf.c":

  static unsigned long randomize_stack_top(unsigned long stack_top)
  {
           unsigned int random_variable = 0;

           if ((current->flags & PF_RANDOMIZE) &&
                   !(current->personality & ADDR_NO_RANDOMIZE)) {
                   random_variable = get_random_int() & STACK_RND_MASK;
                   random_variable <<= PAGE_SHIFT;
           }
           return PAGE_ALIGN(stack_top) + random_variable;
           return PAGE_ALIGN(stack_top) - random_variable;
  }

Note that, it declares the "random_variable" variable as "unsigned int".
Since the result of the shifting operation between STACK_RND_MASK (which
is 0x3fffff on x86_64, 22 bits) and PAGE_SHIFT (which is 12 on x86_64):

  random_variable <<= PAGE_SHIFT;

then the two leftmost bits are dropped when storing the result in the
"random_variable". This variable shall be at least 34 bits long to hold
the (22+12) result.

These two dropped bits have an impact on the entropy of process stack.
Concretely, the total stack entropy is reduced by four: from 2^28 to
2^30 (One fourth of expected entropy).

This patch restores back the entropy by correcting the types involved
in the operations in the functions randomize_stack_top() and
stack_maxrandom_size().

The successful fix can be tested with:

  $ for i in `seq 1 10`; do cat /proc/self/maps | grep stack; done
  7ffeda566000-7ffeda587000 rw-p 00000000 00:00 0                          [stack]
  7fff5a332000-7fff5a353000 rw-p 00000000 00:00 0                          [stack]
  7ffcdb7a1000-7ffcdb7c2000 rw-p 00000000 00:00 0                          [stack]
  7ffd5e2c4000-7ffd5e2e5000 rw-p 00000000 00:00 0                          [stack]
  ...

Once corrected, the leading bytes should be between 7ffc and 7fff,
rather than always being 7fff.

Signed-off-by: Hector Marco-Gisbert <hecmargi@upv.es>
Signed-off-by: Ismael Ripoll <iripoll@upv.es>
[ Rebased, fixed 80 char bugs, cleaned up commit message, added test example and CVE ]
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: <stable@vger.kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Fixes: CVE-2015-1593
Link: http://lkml.kernel.org/r/20150214173350.GA18393@www.outflux.net
Signed-off-by: Borislav Petkov <bp@suse.de>
9 years agoMerge branch 'tip-x86-mm' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp...
Ingo Molnar [Thu, 19 Feb 2015 10:59:18 +0000 (11:59 +0100)]
Merge branch 'tip-x86-mm' of git://git./linux/kernel/git/bp/bp into x86/urgent

Pull boot printout fix from Borislav Petkov.

Signed-off-by: Ingo Molnar <mingo@kernel.org>