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
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entry.S	[ARM] 5440/1: Fix VFP state corruption due to preemption during VFP exceptions	2009-04-01 22:17:50 +01:00
Makefile	kbuild: enable 'make AFLAGS=...' to add additional options to AS	2007-10-15 21:59:31 +02:00
vfp.h	[ARM] 5387/1: Add ptrace VFP support on ARM	2009-02-12 10:59:43 +00:00
vfpdouble.c	[ARM] vfp: fix fuitod/fsitod instructions	2008-01-10 17:07:08 +00:00
vfphw.S	[ARM] 5440/1: Fix VFP state corruption due to preemption during VFP exceptions	2009-04-01 22:17:50 +01:00
vfpinstr.h	[ARM] 4583/1: ARMv7: Add VFPv3 support	2008-01-26 14:41:28 +00:00
vfpmodule.c	[ARM] 5440/1: Fix VFP state corruption due to preemption during VFP exceptions	2009-04-01 22:17:50 +01:00
vfpsingle.c	[ARM] Remove unnecessary asm/ptrace.h from VFP support code	2007-04-22 10:56:40 +01:00