* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (31 commits)
driver core: Display error codes when class suspend fails
Driver core: Add section count to memory_block struct
Driver core: Add mutex for adding/removing memory blocks
Driver core: Move find_memory_block routine
hpilo: Despecificate driver from iLO generation
driver core: Convert link_mem_sections to use find_memory_block_hinted.
driver core: Introduce find_memory_block_hinted which utilizes kset_find_obj_hinted.
kobject: Introduce kset_find_obj_hinted.
driver core: fix build for CONFIG_BLOCK not enabled
driver-core: base: change to new flag variable
sysfs: only access bin file vm_ops with the active lock
sysfs: Fail bin file mmap if vma close is implemented.
FW_LOADER: fix kconfig dependency warning on HOTPLUG
uio: Statically allocate uio_class and use class .dev_attrs.
uio: Support 2^MINOR_BITS minors
uio: Cleanup irq handling.
uio: Don't clear driver data
uio: Fix lack of locking in init_uio_class
SYSFS: Allow boot time switching between deprecated and modern sysfs layout
driver core: remove CONFIG_SYSFS_DEPRECATED_V2 but keep it for block devices
...
AVR32 AVR32 architecture is enabled.
AX25 Appropriate AX.25 support is enabled.
BLACKFIN Blackfin architecture is enabled.
- DRM Direct Rendering Management support is enabled.
EDD BIOS Enhanced Disk Drive Services (EDD) is enabled
EFI EFI Partitioning (GPT) is enabled
EIDE EIDE/ATAPI support is enabled.
+ DRM Direct Rendering Management support is enabled.
+ DYNAMIC_DEBUG Build in debug messages and enable them at runtime
FB The frame buffer device is enabled.
GCOV GCOV profiling is enabled.
HW Appropriate hardware is enabled.
[ARM] imx_timer1,OSTS,netx_timer,mpu_timer2,
pxa_timer,timer3,32k_counter,timer0_1
[AVR32] avr32
- [X86-32] pit,hpet,tsc,vmi-timer;
+ [X86-32] pit,hpet,tsc;
scx200_hrt on Geode; cyclone on IBM x440
[MIPS] MIPS
[PARISC] cr16
Format: <port#>,<type>
See also Documentation/input/joystick-parport.txt
+ ddebug_query= [KNL,DYNAMIC_DEBUG] Enable debug messages at early boot
+ time. See Documentation/dynamic-debug-howto.txt for
+ details.
+
debug [KNL] Enable kernel debugging (events log level).
debug_locks_verbose=
Reserves a hole at the top of the kernel virtual
address space.
+ reservelow= [X86]
+ Format: nn[K]
+ Set the amount of memory to reserve for BIOS at
+ the bottom of the address space.
+
reset_devices [KNL] Force drivers to reset the underlying device
during initialization.
in <PAGE_SIZE> units (needed only for swap files).
See Documentation/power/swsusp-and-swap-files.txt
+ hibernate= [HIBERNATION]
+ noresume Don't check if there's a hibernation image
+ present during boot.
+ nocompress Don't compress/decompress hibernation images.
+
retain_initrd [RAM] Keep initrd memory after extraction
rhash_entries= [KNL,NET]
switches= [HW,M68k]
+ sysfs.deprecated=0|1 [KNL]
+ Enable/disable old style sysfs layout for old udev
+ on older distributions. When this option is enabled
+ very new udev will not work anymore. When this option
+ is disabled (or CONFIG_SYSFS_DEPRECATED not compiled)
+ in older udev will not work anymore.
+ Default depends on CONFIG_SYSFS_DEPRECATED_V2 set in
+ the kernel configuration.
+
sysrq_always_enabled
[KNL]
Ignore sysrq setting - this boot parameter will
disables clocksource verification at runtime.
Used to enable high-resolution timer mode on older
hardware, and in virtualized environment.
+ [x86] noirqtime: Do not use TSC to do irq accounting.
+ Used to run time disable IRQ_TIME_ACCOUNTING on any
+ platforms where RDTSC is slow and this accounting
+ can add overhead.
turbografx.map[2|3]= [HW,JOY]
TurboGraFX parallel port interface
F: arch/arm/mach-shmobile/
F: drivers/sh/
+ARM/TELECHIPS ARM ARCHITECTURE
+M: "Hans J. Koch" <hjk@linutronix.de>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+F: arch/arm/plat-tcc/
+F: arch/arm/mach-tcc8k/
+
ARM/TECHNOLOGIC SYSTEMS TS7250 MACHINE SUPPORT
M: Lennert Buytenhek <kernel@wantstofly.org>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
+ARM/TETON BGA MACHINE SUPPORT
+M: Mark F. Brown <mark.brown314@gmail.com>
+L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S: Maintained
+
ARM/THECUS N2100 MACHINE SUPPORT
M: Lennert Buytenhek <kernel@wantstofly.org>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Supported
F: Documentation/filesystems/ceph.txt
F: fs/ceph
+F: net/ceph
+F: include/linux/ceph
CERTIFIED WIRELESS USB (WUSB) SUBSYSTEM:
M: David Vrabel <david.vrabel@csr.com>
F: lib/lru_cache.c
F: Documentation/blockdev/drbd/
- DRIVER CORE, KOBJECTS, AND SYSFS
+ DRIVER CORE, KOBJECTS, DEBUGFS AND SYSFS
M: Greg Kroah-Hartman <gregkh@suse.de>
T: quilt kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/
S: Supported
F: Documentation/kobject.txt
F: drivers/base/
F: fs/sysfs/
+ F: fs/debugfs/
F: include/linux/kobj*
+ F: include/linux/debugfs.h
F: lib/kobj*
DRM DRIVERS
F: include/net/irda/
F: net/irda/
+IRQ SUBSYSTEM
+M: Thomas Gleixner <tglx@linutronix.de>
+S: Maintained
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git irq/core
+F: kernel/irq/
+
ISAPNP
M: Jaroslav Kysela <perex@perex.cz>
S: Maintained
F: include/linux/qnx4_fs.h
F: include/linux/qnxtypes.h
+RADOS BLOCK DEVICE (RBD)
+F: include/linux/qnxtypes.h
+M: Yehuda Sadeh <yehuda@hq.newdream.net>
+M: Sage Weil <sage@newdream.net>
+M: ceph-devel@vger.kernel.org
+S: Supported
+F: drivers/block/rbd.c
+F: drivers/block/rbd_types.h
+
RADEON FRAMEBUFFER DISPLAY DRIVER
M: Benjamin Herrenschmidt <benh@kernel.crashing.org>
L: linux-fbdev@vger.kernel.org
#include "blk.h"
static DEFINE_MUTEX(block_class_lock);
- #ifndef CONFIG_SYSFS_DEPRECATED
struct kobject *block_depr;
- #endif
/* for extended dynamic devt allocation, currently only one major is used */
#define MAX_EXT_DEVT (1 << MINORBITS)
disk->major = MAJOR(devt);
disk->first_minor = MINOR(devt);
+ /* Register BDI before referencing it from bdev */
+ bdi = &disk->queue->backing_dev_info;
+ bdi_register_dev(bdi, disk_devt(disk));
+
blk_register_region(disk_devt(disk), disk->minors, NULL,
exact_match, exact_lock, disk);
register_disk(disk);
blk_register_queue(disk);
- bdi = &disk->queue->backing_dev_info;
- bdi_register_dev(bdi, disk_devt(disk));
retval = sysfs_create_link(&disk_to_dev(disk)->kobj, &bdi->dev->kobj,
"bdi");
WARN_ON(retval);
struct hd_struct *part;
char name_buf[BDEVNAME_SIZE];
char devt_buf[BDEVT_SIZE];
+ u8 uuid[PARTITION_META_INFO_UUIDLTH * 2 + 1];
/*
* Don't show empty devices or things that have been
while ((part = disk_part_iter_next(&piter))) {
bool is_part0 = part == &disk->part0;
- printk("%s%s %10llu %s", is_part0 ? "" : " ",
+ uuid[0] = 0;
+ if (part->info)
+ part_unpack_uuid(part->info->uuid, uuid);
+
+ printk("%s%s %10llu %s %s", is_part0 ? "" : " ",
bdevt_str(part_devt(part), devt_buf),
(unsigned long long)part->nr_sects >> 1,
- disk_name(disk, part->partno, name_buf));
+ disk_name(disk, part->partno, name_buf), uuid);
if (is_part0) {
if (disk->driverfs_dev != NULL &&
disk->driverfs_dev->driver != NULL)
register_blkdev(BLOCK_EXT_MAJOR, "blkext");
- #ifndef CONFIG_SYSFS_DEPRECATED
/* create top-level block dir */
- block_depr = kobject_create_and_add("block", NULL);
- #endif
+ if (!sysfs_deprecated)
+ block_depr = kobject_create_and_add("block", NULL);
return 0;
}
{
struct disk_part_tbl *ptbl =
container_of(head, struct disk_part_tbl, rcu_head);
+ struct gendisk *disk = ptbl->disk;
+ struct request_queue *q = disk->queue;
+ unsigned long flags;
kfree(ptbl);
+
+ spin_lock_irqsave(q->queue_lock, flags);
+ elv_quiesce_end(q);
+ spin_unlock_irqrestore(q->queue_lock, flags);
}
/**
struct disk_part_tbl *new_ptbl)
{
struct disk_part_tbl *old_ptbl = disk->part_tbl;
+ struct request_queue *q = disk->queue;
rcu_assign_pointer(disk->part_tbl, new_ptbl);
if (old_ptbl) {
rcu_assign_pointer(old_ptbl->last_lookup, NULL);
+
+ spin_lock_irq(q->queue_lock);
+ elv_quiesce_start(q);
+ spin_unlock_irq(q->queue_lock);
+
call_rcu(&old_ptbl->rcu_head, disk_free_ptbl_rcu_cb);
}
}
return -ENOMEM;
new_ptbl->len = target;
+ new_ptbl->disk = disk;
for (i = 0; i < len; i++)
rcu_assign_pointer(new_ptbl->part[i], old_ptbl->part[i]);
kfree(disk->random);
disk_replace_part_tbl(disk, NULL);
free_part_stats(&disk->part0);
+ free_part_info(&disk->part0);
kfree(disk);
}
struct class block_class = {
/*
- * Driver for HP iLO/iLO2 management processor.
+ * Driver for the HP iLO management processor.
*
* Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
* David Altobelli <david.altobelli@hp.com>
.poll = ilo_poll,
.open = ilo_open,
.release = ilo_close,
+ .llseek = noop_llseek,
};
static irqreturn_t ilo_isr(int irq, void *data)
shost->this_id = sht->this_id;
shost->can_queue = sht->can_queue;
shost->sg_tablesize = sht->sg_tablesize;
+ shost->sg_prot_tablesize = sht->sg_prot_tablesize;
shost->cmd_per_lun = sht->cmd_per_lun;
shost->unchecked_isa_dma = sht->unchecked_isa_dma;
shost->use_clustering = sht->use_clustering;
device_initialize(&shost->shost_gendev);
dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);
- #ifndef CONFIG_SYSFS_DEPRECATED
shost->shost_gendev.bus = &scsi_bus_type;
- #endif
shost->shost_gendev.type = &scsi_host_type;
device_initialize(&shost->shost_dev);
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/kobject.h>
+ #include <linux/cdev.h>
#include <linux/uio_driver.h>
- #define UIO_MAX_DEVICES 255
+ #define UIO_MAX_DEVICES (1U << MINORBITS)
struct uio_device {
struct module *owner;
};
static int uio_major;
+ static struct cdev *uio_cdev;
static DEFINE_IDR(uio_idr);
static const struct file_operations uio_fops;
- /* UIO class infrastructure */
- static struct uio_class {
- struct kref kref;
- struct class *class;
- } *uio_class;
-
/* Protect idr accesses */
static DEFINE_MUTEX(minor_lock);
struct device_attribute *attr, char *buf)
{
struct uio_device *idev = dev_get_drvdata(dev);
- if (idev)
- return sprintf(buf, "%s\n", idev->info->name);
- else
- return -ENODEV;
+ return sprintf(buf, "%s\n", idev->info->name);
}
- static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
static ssize_t show_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct uio_device *idev = dev_get_drvdata(dev);
- if (idev)
- return sprintf(buf, "%s\n", idev->info->version);
- else
- return -ENODEV;
+ return sprintf(buf, "%s\n", idev->info->version);
}
- static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
static ssize_t show_event(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct uio_device *idev = dev_get_drvdata(dev);
- if (idev)
- return sprintf(buf, "%u\n",
- (unsigned int)atomic_read(&idev->event));
- else
- return -ENODEV;
+ return sprintf(buf, "%u\n", (unsigned int)atomic_read(&idev->event));
}
- static DEVICE_ATTR(event, S_IRUGO, show_event, NULL);
- static struct attribute *uio_attrs[] = {
- &dev_attr_name.attr,
- &dev_attr_version.attr,
- &dev_attr_event.attr,
- NULL,
+ static struct device_attribute uio_class_attributes[] = {
+ __ATTR(name, S_IRUGO, show_name, NULL),
+ __ATTR(version, S_IRUGO, show_version, NULL),
+ __ATTR(event, S_IRUGO, show_event, NULL),
+ {}
};
- static struct attribute_group uio_attr_grp = {
- .attrs = uio_attrs,
+ /* UIO class infrastructure */
+ static struct class uio_class = {
+ .name = "uio",
+ .dev_attrs = uio_class_attributes,
};
/*
struct uio_port *port;
struct uio_portio *portio;
- ret = sysfs_create_group(&idev->dev->kobj, &uio_attr_grp);
- if (ret)
- goto err_group;
-
for (mi = 0; mi < MAX_UIO_MAPS; mi++) {
mem = &idev->info->mem[mi];
if (mem->size == 0)
kobject_put(&map->kobj);
}
kobject_put(idev->map_dir);
- sysfs_remove_group(&idev->dev->kobj, &uio_attr_grp);
- err_group:
dev_err(idev->dev, "error creating sysfs files (%d)\n", ret);
return ret;
}
kobject_put(&port->portio->kobj);
}
kobject_put(idev->portio_dir);
-
- sysfs_remove_group(&idev->dev->kobj, &uio_attr_grp);
}
static int uio_get_minor(struct uio_device *idev)
struct uio_listener *listener = filep->private_data;
struct uio_device *idev = listener->dev;
- if (idev->info->irq == UIO_IRQ_NONE)
+ if (!idev->info->irq)
return -EIO;
poll_wait(filep, &idev->wait, wait);
ssize_t retval;
s32 event_count;
- if (idev->info->irq == UIO_IRQ_NONE)
+ if (!idev->info->irq)
return -EIO;
if (count != sizeof(s32))
ssize_t retval;
s32 irq_on;
- if (idev->info->irq == UIO_IRQ_NONE)
+ if (!idev->info->irq)
return -EIO;
if (count != sizeof(s32))
.mmap = uio_mmap,
.poll = uio_poll,
.fasync = uio_fasync,
+ .llseek = noop_llseek,
};
static int uio_major_init(void)
{
- uio_major = register_chrdev(0, "uio", &uio_fops);
- if (uio_major < 0)
- return uio_major;
- return 0;
+ static const char name[] = "uio";
+ struct cdev *cdev = NULL;
+ dev_t uio_dev = 0;
+ int result;
+
+ result = alloc_chrdev_region(&uio_dev, 0, UIO_MAX_DEVICES, name);
+ if (result)
+ goto out;
+
+ result = -ENOMEM;
+ cdev = cdev_alloc();
+ if (!cdev)
+ goto out_unregister;
+
+ cdev->owner = THIS_MODULE;
+ cdev->ops = &uio_fops;
+ kobject_set_name(&cdev->kobj, "%s", name);
+
+ result = cdev_add(cdev, uio_dev, UIO_MAX_DEVICES);
+ if (result)
+ goto out_put;
+
+ uio_major = MAJOR(uio_dev);
+ uio_cdev = cdev;
+ result = 0;
+ out:
+ return result;
+ out_put:
+ kobject_put(&cdev->kobj);
+ out_unregister:
+ unregister_chrdev_region(uio_dev, UIO_MAX_DEVICES);
+ goto out;
}
static void uio_major_cleanup(void)
{
- unregister_chrdev(uio_major, "uio");
+ unregister_chrdev_region(MKDEV(uio_major, 0), UIO_MAX_DEVICES);
+ cdev_del(uio_cdev);
}
static int init_uio_class(void)
{
- int ret = 0;
-
- if (uio_class != NULL) {
- kref_get(&uio_class->kref);
- goto exit;
- }
+ int ret;
/* This is the first time in here, set everything up properly */
ret = uio_major_init();
if (ret)
goto exit;
- uio_class = kzalloc(sizeof(*uio_class), GFP_KERNEL);
- if (!uio_class) {
- ret = -ENOMEM;
- goto err_kzalloc;
- }
-
- kref_init(&uio_class->kref);
- uio_class->class = class_create(THIS_MODULE, "uio");
- if (IS_ERR(uio_class->class)) {
- ret = IS_ERR(uio_class->class);
- printk(KERN_ERR "class_create failed for uio\n");
- goto err_class_create;
+ ret = class_register(&uio_class);
+ if (ret) {
+ printk(KERN_ERR "class_register failed for uio\n");
+ goto err_class_register;
}
return 0;
- err_class_create:
- kfree(uio_class);
- uio_class = NULL;
- err_kzalloc:
+ err_class_register:
uio_major_cleanup();
exit:
return ret;
}
- static void release_uio_class(struct kref *kref)
+ static void release_uio_class(void)
{
- /* Ok, we cheat as we know we only have one uio_class */
- class_destroy(uio_class->class);
- kfree(uio_class);
+ class_unregister(&uio_class);
uio_major_cleanup();
- uio_class = NULL;
- }
-
- static void uio_class_destroy(void)
- {
- if (uio_class)
- kref_put(&uio_class->kref, release_uio_class);
}
/**
info->uio_dev = NULL;
- ret = init_uio_class();
- if (ret)
- return ret;
-
idev = kzalloc(sizeof(*idev), GFP_KERNEL);
if (!idev) {
ret = -ENOMEM;
if (ret)
goto err_get_minor;
- idev->dev = device_create(uio_class->class, parent,
+ idev->dev = device_create(&uio_class, parent,
MKDEV(uio_major, idev->minor), idev,
"uio%d", idev->minor);
if (IS_ERR(idev->dev)) {
info->uio_dev = idev;
- if (idev->info->irq >= 0) {
- ret = request_irq(idev->info->irq, uio_interrupt,
- idev->info->irq_flags, idev->info->name, idev);
+ if (info->irq && (info->irq != UIO_IRQ_CUSTOM)) {
+ ret = request_irq(info->irq, uio_interrupt,
+ info->irq_flags, info->name, idev);
if (ret)
goto err_request_irq;
}
err_request_irq:
uio_dev_del_attributes(idev);
err_uio_dev_add_attributes:
- device_destroy(uio_class->class, MKDEV(uio_major, idev->minor));
+ device_destroy(&uio_class, MKDEV(uio_major, idev->minor));
err_device_create:
uio_free_minor(idev);
err_get_minor:
kfree(idev);
err_kzalloc:
- uio_class_destroy();
return ret;
}
EXPORT_SYMBOL_GPL(__uio_register_device);
uio_free_minor(idev);
- if (info->irq >= 0)
+ if (info->irq && (info->irq != UIO_IRQ_CUSTOM))
free_irq(info->irq, idev);
uio_dev_del_attributes(idev);
- dev_set_drvdata(idev->dev, NULL);
- device_destroy(uio_class->class, MKDEV(uio_major, idev->minor));
+ device_destroy(&uio_class, MKDEV(uio_major, idev->minor));
kfree(idev);
- uio_class_destroy();
return;
}
static int __init uio_init(void)
{
- return 0;
+ return init_uio_class();
}
static void __exit uio_exit(void)
{
+ release_uio_class();
}
module_init(uio_init)
{
struct hd_struct *p = dev_to_part(dev);
free_part_stats(p);
+ free_part_info(p);
kfree(p);
}
static void delete_partition_rcu_cb(struct rcu_head *head)
{
struct hd_struct *part = container_of(head, struct hd_struct, rcu_head);
+ struct gendisk *disk = part_to_disk(part);
+ struct request_queue *q = disk->queue;
+ unsigned long flags;
part->start_sect = 0;
part->nr_sects = 0;
part_stat_set_all(part, 0);
put_device(part_to_dev(part));
+
+ spin_lock_irqsave(q->queue_lock, flags);
+ elv_quiesce_end(q);
+ spin_unlock_irqrestore(q->queue_lock, flags);
}
void delete_partition(struct gendisk *disk, int partno)
{
struct disk_part_tbl *ptbl = disk->part_tbl;
struct hd_struct *part;
+ struct request_queue *q = disk->queue;
if (partno >= ptbl->len)
return;
kobject_put(part->holder_dir);
device_del(part_to_dev(part));
+ spin_lock_irq(q->queue_lock);
+ elv_quiesce_start(q);
+ spin_unlock_irq(q->queue_lock);
+
call_rcu(&part->rcu_head, delete_partition_rcu_cb);
}
whole_disk_show, NULL);
struct hd_struct *add_partition(struct gendisk *disk, int partno,
- sector_t start, sector_t len, int flags)
+ sector_t start, sector_t len, int flags,
+ struct partition_meta_info *info)
{
struct hd_struct *p;
dev_t devt = MKDEV(0, 0);
p->partno = partno;
p->policy = get_disk_ro(disk);
+ if (info) {
+ struct partition_meta_info *pinfo = alloc_part_info(disk);
+ if (!pinfo)
+ goto out_free_stats;
+ memcpy(pinfo, info, sizeof(*info));
+ p->info = pinfo;
+ }
+
dname = dev_name(ddev);
if (isdigit(dname[strlen(dname) - 1]))
dev_set_name(pdev, "%sp%d", dname, partno);
err = blk_alloc_devt(p, &devt);
if (err)
- goto out_free_stats;
+ goto out_free_info;
pdev->devt = devt;
/* delay uevent until 'holders' subdir is created */
return p;
+out_free_info:
+ free_part_info(p);
out_free_stats:
free_part_stats(p);
out_free:
if (device_add(ddev))
return;
- #ifndef CONFIG_SYSFS_DEPRECATED
- err = sysfs_create_link(block_depr, &ddev->kobj,
- kobject_name(&ddev->kobj));
- if (err) {
- device_del(ddev);
- return;
+ if (!sysfs_deprecated) {
+ err = sysfs_create_link(block_depr, &ddev->kobj,
+ kobject_name(&ddev->kobj));
+ if (err) {
+ device_del(ddev);
+ return;
+ }
}
- #endif
disk->part0.holder_dir = kobject_create_and_add("holders", &ddev->kobj);
disk->slave_dir = kobject_create_and_add("slaves", &ddev->kobj);
/* add partitions */
for (p = 1; p < state->limit; p++) {
sector_t size, from;
+ struct partition_meta_info *info = NULL;
size = state->parts[p].size;
if (!size)
size = get_capacity(disk) - from;
}
}
+
+ if (state->parts[p].has_info)
+ info = &state->parts[p].info;
part = add_partition(disk, p, from, size,
- state->parts[p].flags);
+ state->parts[p].flags,
+ &state->parts[p].info);
if (IS_ERR(part)) {
printk(KERN_ERR " %s: p%d could not be added: %ld\n",
disk->disk_name, p, -PTR_ERR(part));
kobject_put(disk->part0.holder_dir);
kobject_put(disk->slave_dir);
disk->driverfs_dev = NULL;
- #ifndef CONFIG_SYSFS_DEPRECATED
- sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk)));
- #endif
+ if (!sysfs_deprecated)
+ sysfs_remove_link(block_depr, dev_name(disk_to_dev(disk)));
device_del(disk_to_dev(disk));
}
depends on !UML
default y
+config HAVE_IRQ_WORK
+ bool
+
+config IRQ_WORK
+ bool
+ depends on HAVE_IRQ_WORK
+
menu "General setup"
config EXPERIMENTAL
config LOCK_KERNEL
bool
- depends on SMP || PREEMPT
+ depends on (SMP || PREEMPT) && BKL
default y
config INIT_ENV_ARG_LIMIT
depends on AUDITSYSCALL
select FSNOTIFY
+source "kernel/irq/Kconfig"
+
menu "RCU Subsystem"
choice
config TREE_RCU
bool "Tree-based hierarchical RCU"
+ depends on !PREEMPT && SMP
help
This option selects the RCU implementation that is
designed for very large SMP system with hundreds or
smaller systems.
config TREE_PREEMPT_RCU
- bool "Preemptable tree-based hierarchical RCU"
+ bool "Preemptible tree-based hierarchical RCU"
depends on PREEMPT
help
This option selects the RCU implementation that is
is not required. This option greatly reduces the
memory footprint of RCU.
+config TINY_PREEMPT_RCU
+ bool "Preemptible UP-only small-memory-footprint RCU"
+ depends on !SMP && PREEMPT
+ help
+ This option selects the RCU implementation that is designed
+ for real-time UP systems. This option greatly reduces the
+ memory footprint of RCU.
+
endchoice
+config PREEMPT_RCU
+ def_bool ( TREE_PREEMPT_RCU || TINY_PREEMPT_RCU )
+ help
+ This option enables preemptible-RCU code that is common between
+ the TREE_PREEMPT_RCU and TINY_PREEMPT_RCU implementations.
+
config RCU_TRACE
bool "Enable tracing for RCU"
depends on TREE_RCU || TREE_PREEMPT_RCU
help
This option controls the fanout of hierarchical implementations
of RCU, allowing RCU to work efficiently on machines with
- large numbers of CPUs. This value must be at least the cube
- root of NR_CPUS, which allows NR_CPUS up to 32,768 for 32-bit
- systems and up to 262,144 for 64-bit systems.
+ large numbers of CPUs. This value must be at least the fourth
+ root of NR_CPUS, which allows NR_CPUS to be insanely large.
+ The default value of RCU_FANOUT should be used for production
+ systems, but if you are stress-testing the RCU implementation
+ itself, small RCU_FANOUT values allow you to test large-system
+ code paths on small(er) systems.
Select a specific number if testing RCU itself.
Take the default if unsure.
Currently, CFQ IO scheduler uses it to recognize task groups and
control disk bandwidth allocation (proportional time slice allocation)
- to such task groups.
+ to such task groups. It is also used by bio throttling logic in
+ block layer to implement upper limit in IO rates on a device.
This option only enables generic Block IO controller infrastructure.
- One needs to also enable actual IO controlling logic in CFQ for it
- to take effect. (CONFIG_CFQ_GROUP_IOSCHED=y).
+ One needs to also enable actual IO controlling logic/policy. For
+ enabling proportional weight division of disk bandwidth in CFQ seti
+ CONFIG_CFQ_GROUP_IOSCHED=y and for enabling throttling policy set
+ CONFIG_BLK_THROTTLE=y.
See Documentation/cgroups/blkio-controller.txt for more information.
bool
config SYSFS_DEPRECATED
- bool
-
- config SYSFS_DEPRECATED_V2
bool "enable deprecated sysfs features to support old userspace tools"
depends on SYSFS
default n
- select SYSFS_DEPRECATED
- help
- This option switches the layout of sysfs to the deprecated
- version. Do not use it on recent distributions.
-
- The current sysfs layout features a unified device tree at
- /sys/devices/, which is able to express a hierarchy between
- class devices. If the deprecated option is set to Y, the
- unified device tree is split into a bus device tree at
- /sys/devices/ and several individual class device trees at
- /sys/class/. The class and bus devices will be connected by
- "<subsystem>:<name>" and the "device" links. The "block"
- class devices, will not show up in /sys/class/block/. Some
- subsystems will suppress the creation of some devices which
- depend on the unified device tree.
-
- This option is not a pure compatibility option that can
- be safely enabled on newer distributions. It will change the
- layout of sysfs to the non-extensible deprecated version,
- and disable some features, which can not be exported without
- confusing older userspace tools. Since 2007/2008 all major
- distributions do not enable this option, and ship no tools which
- depend on the deprecated layout or this option.
-
- If you are using a new kernel on an older distribution, or use
- older userspace tools, you might need to say Y here. Do not say Y,
- if the original kernel, that came with your distribution, has
- this option set to N.
+ help
+ This option adds code that switches the layout of the "block" class
+ devices, to not show up in /sys/class/block/, but only in
+ /sys/block/.
+
+ This switch is only active when the sysfs.deprecated=1 boot option is
+ passed or the SYSFS_DEPRECATED_V2 option is set.
+
+ This option allows new kernels to run on old distributions and tools,
+ which might get confused by /sys/class/block/. Since 2007/2008 all
+ major distributions and tools handle this just fine.
+
+ Recent distributions and userspace tools after 2009/2010 depend on
+ the existence of /sys/class/block/, and will not work with this
+ option enabled.
+
+ Only if you are using a new kernel on an old distribution, you might
+ need to say Y here.
+
+ config SYSFS_DEPRECATED_V2
+ bool "enabled deprecated sysfs features by default"
+ default n
+ depends on SYSFS
+ depends on SYSFS_DEPRECATED
+ help
+ Enable deprecated sysfs by default.
+
+ See the CONFIG_SYSFS_DEPRECATED option for more details about this
+ option.
+
+ Only if you are using a new kernel on an old distribution, you might
+ need to say Y here. Even then, odds are you would not need it
+ enabled, you can always pass the boot option if absolutely necessary.
config RELAY
bool "Kernel->user space relay support (formerly relayfs)"
default y if (PROFILING || PERF_COUNTERS)
depends on HAVE_PERF_EVENTS
select ANON_INODES
+ select IRQ_WORK
help
Enable kernel support for various performance events provided
by software and hardware.
#include <linux/dynamic_debug.h>
#include <linux/debugfs.h>
#include <linux/slab.h>
+#include <linux/jump_label.h>
extern struct _ddebug __start___verbose[];
extern struct _ddebug __stop___verbose[];
-/* dynamic_debug_enabled, and dynamic_debug_enabled2 are bitmasks in which
- * bit n is set to 1 if any modname hashes into the bucket n, 0 otherwise. They
- * use independent hash functions, to reduce the chance of false positives.
- */
-long long dynamic_debug_enabled;
-EXPORT_SYMBOL_GPL(dynamic_debug_enabled);
-long long dynamic_debug_enabled2;
-EXPORT_SYMBOL_GPL(dynamic_debug_enabled2);
-
struct ddebug_table {
struct list_head link;
char *mod_name;
return buf;
}
-/*
- * must be called with ddebug_lock held
- */
-
-static int disabled_hash(char hash, bool first_table)
-{
- struct ddebug_table *dt;
- char table_hash_value;
-
- list_for_each_entry(dt, &ddebug_tables, link) {
- if (first_table)
- table_hash_value = dt->ddebugs->primary_hash;
- else
- table_hash_value = dt->ddebugs->secondary_hash;
- if (dt->num_enabled && (hash == table_hash_value))
- return 0;
- }
- return 1;
-}
-
/*
* Search the tables for _ddebug's which match the given
* `query' and apply the `flags' and `mask' to them. Tells
dt->num_enabled++;
dp->flags = newflags;
if (newflags) {
- dynamic_debug_enabled |=
- (1LL << dp->primary_hash);
- dynamic_debug_enabled2 |=
- (1LL << dp->secondary_hash);
+ jump_label_enable(&dp->enabled);
} else {
- if (disabled_hash(dp->primary_hash, true))
- dynamic_debug_enabled &=
- ~(1LL << dp->primary_hash);
- if (disabled_hash(dp->secondary_hash, false))
- dynamic_debug_enabled2 &=
- ~(1LL << dp->secondary_hash);
+ jump_label_disable(&dp->enabled);
}
if (verbose)
printk(KERN_INFO
return 0;
}
+ static int ddebug_exec_query(char *query_string)
+ {
+ unsigned int flags = 0, mask = 0;
+ struct ddebug_query query;
+ #define MAXWORDS 9
+ int nwords;
+ char *words[MAXWORDS];
+
+ nwords = ddebug_tokenize(query_string, words, MAXWORDS);
+ if (nwords <= 0)
+ return -EINVAL;
+ if (ddebug_parse_query(words, nwords-1, &query))
+ return -EINVAL;
+ if (ddebug_parse_flags(words[nwords-1], &flags, &mask))
+ return -EINVAL;
+
+ /* actually go and implement the change */
+ ddebug_change(&query, flags, mask);
+ return 0;
+ }
+
+ static __initdata char ddebug_setup_string[1024];
+ static __init int ddebug_setup_query(char *str)
+ {
+ if (strlen(str) >= 1024) {
+ pr_warning("ddebug boot param string too large\n");
+ return 0;
+ }
+ strcpy(ddebug_setup_string, str);
+ return 1;
+ }
+
+ __setup("ddebug_query=", ddebug_setup_query);
+
/*
* File_ops->write method for <debugfs>/dynamic_debug/conrol. Gathers the
* command text from userspace, parses and executes it.
static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
size_t len, loff_t *offp)
{
- unsigned int flags = 0, mask = 0;
- struct ddebug_query query;
- #define MAXWORDS 9
- int nwords;
- char *words[MAXWORDS];
char tmpbuf[256];
+ int ret;
if (len == 0)
return 0;
printk(KERN_INFO "%s: read %d bytes from userspace\n",
__func__, (int)len);
- nwords = ddebug_tokenize(tmpbuf, words, MAXWORDS);
- if (nwords <= 0)
- return -EINVAL;
- if (ddebug_parse_query(words, nwords-1, &query))
- return -EINVAL;
- if (ddebug_parse_flags(words[nwords-1], &flags, &mask))
- return -EINVAL;
-
- /* actually go and implement the change */
- ddebug_change(&query, flags, mask);
+ ret = ddebug_exec_query(tmpbuf);
+ if (ret)
+ return ret;
*offp += len;
return len;
mutex_unlock(&ddebug_lock);
}
- static int __init dynamic_debug_init(void)
+ static __initdata int ddebug_init_success;
+
+ static int __init dynamic_debug_init_debugfs(void)
{
struct dentry *dir, *file;
- struct _ddebug *iter, *iter_start;
- const char *modname = NULL;
- int ret = 0;
- int n = 0;
+
+ if (!ddebug_init_success)
+ return -ENODEV;
dir = debugfs_create_dir("dynamic_debug", NULL);
if (!dir)
debugfs_remove(dir);
return -ENOMEM;
}
+ return 0;
+ }
+
+ static int __init dynamic_debug_init(void)
+ {
+ struct _ddebug *iter, *iter_start;
+ const char *modname = NULL;
+ int ret = 0;
+ int n = 0;
+
if (__start___verbose != __stop___verbose) {
iter = __start___verbose;
modname = iter->modname;
}
ret = ddebug_add_module(iter_start, n, modname);
}
+
+ /* ddebug_query boot param got passed -> set it up */
+ if (ddebug_setup_string[0] != '\0') {
+ ret = ddebug_exec_query(ddebug_setup_string);
+ if (ret)
+ pr_warning("Invalid ddebug boot param %s",
+ ddebug_setup_string);
+ else
+ pr_info("ddebug initialized with string %s",
+ ddebug_setup_string);
+ }
+
out_free:
- if (ret) {
+ if (ret)
ddebug_remove_all_tables();
- debugfs_remove(dir);
- debugfs_remove(file);
- }
+ else
+ ddebug_init_success = 1;
return 0;
}
- module_init(dynamic_debug_init);
+ /* Allow early initialization for boot messages via boot param */
+ arch_initcall(dynamic_debug_init);
+ /* Debugfs setup must be done later */
+ module_init(dynamic_debug_init_debugfs);
git.openpandora.org / pandora-kernel.git / commitdiff