lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
8586831317
linux-kernel-test/arch/arm
History
Mark Rutland 8586831317 ARM: 8128/1: abort: don't clear the exclusive monitors 
The ARMv6 and ARMv7 early abort handlers clear the exclusive monitors
upon entry to the kernel, but this is redundant:

  - We clear the monitors on every exception return since commit
    200b812d00 ("Clear the exclusive monitor when returning from an
    exception"), so this is not necessary to ensure the monitors are
    cleared before returning from a fault handler.

  - Any dummy STREX will target a temporary scratch area in memory, and
    may succeed or fail without corrupting useful data. Its status value
    will not be used.

  - Any other STREX in the kernel must be preceded by an LDREX, which
    will initialise the monitors consistently and will not depend on the
    earlier state of the monitors.

Therefore we have no reason to care about the initial state of the
exclusive monitors when a data abort is taken, and clearing the monitors
prior to exception return (as we already do) is sufficient.

This patch removes the redundant clearing of the exclusive monitors from
the early abort handlers.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-08-27 15:40:12 +01:00
..
boot ARM: shmobile: koelsch: Remove non-existent i2c6 pinmux 2014-08-24 11:23:28 -07:00
common Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2014-08-11 07:14:01 -07:00
configs ARM: SoC defconfig updates for 3.17 2014-08-08 11:35:11 -07:00
crypto Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2014-08-05 10:05:29 -07:00
firmware
include ARM: 8127/1: module: add support for R_ARM_TARGET1 relocations 2014-08-27 15:40:11 +01:00
kernel ARM: 8127/1: module: add support for R_ARM_TARGET1 relocations 2014-08-27 15:40:11 +01:00
kvm Here are the PPC and ARM changes for KVM, which I separated because 2014-08-07 11:35:30 -07:00
lib ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
mach-at91 This is the bulk of GPIO changes for the v3.17 development 2014-08-08 18:00:35 -07:00
mach-axxia
mach-bcm ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
mach-berlin
mach-clps711x ARM: SoC cleanups for 3.17 2014-08-08 11:00:26 -07:00
mach-cns3xxx
mach-davinci
mach-dove
mach-ebsa110 ARM: 8113/1: remove remaining definitions of PLAT_PHYS_OFFSET from <mach/memory.h> 2014-07-29 23:08:52 +01:00
mach-efm32
mach-ep93xx ARM: 8113/1: remove remaining definitions of PLAT_PHYS_OFFSET from <mach/memory.h> 2014-07-29 23:08:52 +01:00
mach-exynos ARM: EXYNOS: Fix suspend/resume sequences 2014-08-09 08:24:36 -07:00
mach-footbridge ARM: 8113/1: remove remaining definitions of PLAT_PHYS_OFFSET from <mach/memory.h> 2014-07-29 23:08:52 +01:00
mach-gemini
mach-highbank
mach-hisi ARM: hisi: remove smp from machine descriptor 2014-07-30 22:32:21 -07:00
mach-imx ARM: imx: correct gpu2d_axi and gpu3d_axi clock setting 2014-08-18 15:05:22 +08:00
mach-integrator ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
mach-iop13xx ARM: 8113/1: remove remaining definitions of PLAT_PHYS_OFFSET from <mach/memory.h> 2014-07-29 23:08:52 +01:00
mach-iop32x
mach-iop33x
mach-ixp4xx
mach-keystone
mach-ks8695 ARM: 8113/1: remove remaining definitions of PLAT_PHYS_OFFSET from <mach/memory.h> 2014-07-29 23:08:52 +01:00
mach-lpc32xx
mach-mediatek
mach-mmp
mach-moxart
mach-msm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2014-08-06 21:03:53 -07:00
mach-mv78xx0
mach-mvebu ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
mach-mxs
mach-netx
mach-nomadik
mach-nspire
mach-omap1 ARM: SoC cleanups for 3.17 2014-08-08 11:00:26 -07:00
mach-omap2 Few fixes for the v3.17 merge window: 2014-08-09 08:23:27 -07:00
mach-orion5x
mach-picoxcell
mach-prima2
mach-pxa Merge branch 'akpm' (second patchbomb from Andrew Morton) 2014-08-08 15:57:47 -07:00
mach-qcom
mach-realview ARM: SoC cleanups for 3.17 2014-08-08 11:00:26 -07:00
mach-rockchip ARM: SoC device-tree changes for 3.17 2014-08-08 11:16:58 -07:00
mach-rpc ARM: 8113/1: remove remaining definitions of PLAT_PHYS_OFFSET from <mach/memory.h> 2014-07-29 23:08:52 +01:00
mach-s3c24xx Merge branch 'akpm' (second patchbomb from Andrew Morton) 2014-08-08 15:57:47 -07:00
mach-s3c64xx
mach-s5pv210 ARM: SoC cleanups for 3.17 2014-08-08 11:00:26 -07:00
mach-sa1100 ARM: 8113/1: remove remaining definitions of PLAT_PHYS_OFFSET from <mach/memory.h> 2014-07-29 23:08:52 +01:00
mach-shmobile sh: intc: Confine SH_INTC to platforms that need it 2014-08-22 12:28:16 +09:00
mach-socfpga
mach-spear ARM: SoC driver changes for 3.17 2014-08-08 11:34:32 -07:00
mach-sti
mach-sunxi ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
mach-tegra This is the bulk of GPIO changes for the v3.17 development 2014-08-08 18:00:35 -07:00
mach-u300
mach-ux500
mach-versatile ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
mach-vexpress ARM: SoC cleanups for 3.17 2014-08-08 11:00:26 -07:00
mach-vt8500
mach-w90x900 arch/arm/mach-w90x900/cpu.c: replace obsolete strict_strto 2014-08-08 15:57:28 -07:00
mach-zynq
mm ARM: 8128/1: abort: don't clear the exclusive monitors 2014-08-27 15:40:12 +01:00
net net: filter: split 'struct sk_filter' into socket and bpf parts 2014-08-02 15:03:58 -07:00
nwfpe
oprofile Merge branch 'devel-stable' into for-next 2014-08-05 10:27:25 +01:00
plat-iop
plat-omap ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00
plat-orion
plat-pxa
plat-samsung Merge branch 'cleanup/gpio-header-removal' into next/soc 2014-07-26 18:00:40 +02:00
plat-versatile
tools
vfp
xen arm/xen: remove duplicate arch_gnttab_init() function 2014-08-11 11:59:14 +01:00
Kconfig Merge branch 'akpm' (second patchbomb from Andrew Morton) 2014-08-08 15:57:47 -07:00
Kconfig-nommu
Kconfig.debug ARM: SoC device-tree changes for 3.17 2014-08-08 11:16:58 -07:00
Makefile ARM: SoC platform changes for 3.17 2014-08-08 11:14:29 -07:00