Btrfs: check return value of alloc_extent_map()

[pandora-kernel.git] / arch / arm / Kconfig

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ab14c0a..9c26ba7 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -271,7 +271,6 @@ config ARCH_AT91
        bool "Atmel AT91"
        select ARCH_REQUIRE_GPIOLIB
        select HAVE_CLK
-       select ARCH_USES_GETTIMEOFFSET
        help
          This enables support for systems based on the Atmel AT91RM9200,
          AT91SAM9 and AT91CAP9 processors.
@@ -1063,6 +1062,20 @@ config ARM_ERRATA_742230
          instruction to behave as a DSB, ensuring the correct behaviour of
          the two writes.
 
+config ARM_ERRATA_742231
+       bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
+       depends on CPU_V7 && SMP
+       help
+         This option enables the workaround for the 742231 Cortex-A9
+         (r2p0..r2p2) erratum. Under certain conditions, specific to the
+         Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
+         accessing some data located in the same cache line, may get corrupted
+         data due to bad handling of the address hazard when the line gets
+         replaced from one of the CPUs at the same time as another CPU is
+         accessing it. This workaround sets specific bits in the diagnostic
+         register of the Cortex-A9 which reduces the linefill issuing
+         capabilities of the processor.
+
 config PL310_ERRATA_588369
        bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
        depends on CACHE_L2X0 && ARCH_OMAP4
@@ -1088,6 +1101,20 @@ config ARM_ERRATA_720789
          invalidated are not, resulting in an incoherency in the system page
          tables. The workaround changes the TLB flushing routines to invalidate
          entries regardless of the ASID.
+
+config ARM_ERRATA_743622
+       bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
+       depends on CPU_V7
+       help
+         This option enables the workaround for the 743622 Cortex-A9
+         (r2p0..r2p2) erratum. Under very rare conditions, a faulty
+         optimisation in the Cortex-A9 Store Buffer may lead to data
+         corruption. This workaround sets a specific bit in the diagnostic
+         register of the Cortex-A9 which disables the Store Buffer
+         optimisation, preventing the defect from occurring. This has no
+         visible impact on the overall performance or power consumption of the
+         processor.
+
 endmenu
 
 source "arch/arm/common/Kconfig"