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George G. Davis f2255be812 [ARM] 5440/1: Fix VFP state corruption due to preemption during VFP exceptions 
We've observed that ARM VFP state can be corrupted during VFP exception
handling when PREEMPT is enabled.  The exact conditions are difficult
to reproduce but appear to occur during VFP exception handling when a
task causes a VFP exception which is handled via VFP_bounce and is then
preempted by yet another task which in turn causes yet another VFP
exception.  Since the VFP_bounce code is not preempt safe, VFP state then
becomes corrupt.  In order to prevent preemption from occuring while
handling a VFP exception, this patch disables preemption while handling
VFP exceptions.

Signed-off-by: George G. Davis <gdavis@mvista.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-04-01 22:17:50 +01:00
..
boot Merge branch 'for-rmk' of git://gitorious.org/linux-gemini/mainline into devel 2009-03-26 23:10:11 +00:00
common clkdev: add possibility to get a clock based on the device name 2009-03-27 14:51:13 +01:00
configs Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 into devel 2009-03-25 18:31:35 +00:00
include/asm Merge branch 'master' into devel 2009-03-28 20:30:18 +00:00
kernel Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-28 14:03:14 -07:00
lib Merge branch 'clps7500' into devel 2008-11-27 12:39:43 +00:00
mach-aaec2000 [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-at91 [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-clps711x [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-davinci [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-ebsa110 [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-ep93xx Merge branch 'master' of git://git.marvell.com/orion into devel 2009-03-19 23:10:40 +00:00
mach-footbridge [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-gemini [ARM] arch_reset() now takes a second parameter 2009-03-30 10:40:12 +01:00
mach-h720x [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-imx i.MX1: remove fb support from mach-imx 2009-03-27 14:51:13 +01:00
mach-integrator [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-iop13xx Merge branch 'master' into devel 2009-03-28 20:30:18 +00:00
mach-iop32x [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-iop33x [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-ixp4xx [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-ixp23xx [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-ixp2000 [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-kirkwood Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
mach-ks8695 Merge branch 'highmem' into devel 2009-03-24 22:47:45 +00:00
mach-l7200 [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-lh7a40x [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-loki [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-mmp [ARM] arch_reset() now takes a second parameter 2009-03-30 10:40:12 +01:00
mach-msm [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-mv78xx0 Merge branch 'master' of git://git.marvell.com/orion into devel 2009-03-19 23:10:40 +00:00
mach-mx1 Merge branch 'master' of git://git.marvell.com/orion into devel 2009-03-19 23:10:40 +00:00
mach-mx2 i.MX21/27: remove ifdef CONFIG_FB_IMX 2009-03-27 14:51:14 +01:00
mach-mx3 qong: basic support for Dave/DENX QongEVB-LITE board 2009-03-13 10:35:05 +01:00
mach-netx [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-ns9xxx Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
mach-omap1 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 into devel 2009-03-25 18:31:35 +00:00
mach-omap2 [ARM] 5436/1: ARM: OMAP: Fix compile for rx51 2009-04-01 22:14:51 +01:00
mach-orion5x Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
mach-pnx4008 [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-pxa Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
mach-realview [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-rpc [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-s3c24a0/include/mach [ARM] S3C: Make IRQ_EINT sleep control common 2009-03-08 12:35:36 +00:00
mach-s3c2400 [ARM] remove a common set of __virt_to_bus definitions 2008-11-28 15:36:49 +00:00
mach-s3c2410 Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
mach-s3c2412 Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
mach-s3c2440 Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
mach-s3c2442 [ARM] Arrange for platforms to select appropriate CPU support 2008-11-27 12:38:00 +00:00
mach-s3c2443 S3C24XX: Move and update IIS headers 2009-03-05 12:00:59 +00:00
mach-s3c6400 Merge branch 'next-s3c64xx-regs' of git://aeryn.fluff.org.uk/bjdooks/linux into devel 2009-03-26 22:46:22 +00:00
mach-s3c6410 [ARM] SMDK6410: Declare iodesc table static 2009-02-26 23:21:49 +00:00
mach-sa1100 [ARM] collie: fix two minor formatting nits 2009-03-25 10:15:00 +00:00
mach-shark [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-versatile [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mach-w90x900 [ARM] pass reboot command line to arch_reset() 2009-03-19 16:20:24 +00:00
mm [ARM] 5439/1: Do not clear bit 10 of DFSR during abort handling on ARMv6 2009-04-01 22:15:57 +01:00
nwfpe [ARM] Convert asm/uaccess.h to linux/uaccess.h 2008-09-06 11:35:55 +01:00
oprofile Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm 2009-03-28 14:03:14 -07:00
plat-iop [ARM] iop: iop3xx needs registers mapped uncached+unbuffered 2008-11-09 11:18:36 +00:00
plat-mxc mxc: add arch_reset() function 2009-03-27 14:51:14 +01:00
plat-omap [ARM] 5434/1: ARM: OMAP: Fix mailbox compile for 24xx 2009-03-28 19:35:02 +00:00
plat-orion Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
plat-pxa [ARM] pxa: build arch/arm/plat-pxa/mfp.c only when PXA3xx or ARCH_MMP defined 2009-03-26 21:30:11 +08:00
plat-s3c Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
plat-s3c24xx Merge branch 'origin' into devel 2009-03-28 20:29:51 +00:00
plat-s3c64xx [ARM] S3C64XX: add AHB_CON and SPCON register address definitions 2009-03-10 16:33:42 +00:00
tools [ARM] update mach-types 2009-03-23 16:12:37 -04:00
vfp [ARM] 5440/1: Fix VFP state corruption due to preemption during VFP exceptions 2009-04-01 22:17:50 +01:00
Kconfig Merge branch 'for-rmk' of git://gitorious.org/linux-gemini/mainline into devel 2009-03-26 23:10:11 +00:00
Kconfig-nommu [ARM] 4532/1: allow configuration of processor ID 2007-10-12 23:43:02 +01:00
Kconfig.debug [ARM] 5412/1: XSCALE: add ice dcc support 2009-02-27 20:57:46 +00:00
Makefile Merge branch 'for-rmk' of git://gitorious.org/linux-gemini/mainline into devel 2009-03-26 23:10:11 +00:00