Oleg Nesterov 089f9fba56 i387: ptrace breaks the lazy-fpu-restore logic ... Starting from 7e16838d "i387: support lazy restore of FPU state" we assume that fpu_owner_task doesn't need restore_fpu_checking() on the context switch, its FPU state should match what we already have in the FPU on this CPU. However, debugger can change the tracee's FPU state, in this case we should reset fpu.last_cpu to ensure fpu_lazy_restore() can't return true. Change init_fpu() to do this, it is called by user_regset->set() methods. Reported-by: Jan Kratochvil <jan.kratochvil@redhat.com> Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Link: http://lkml.kernel.org/r/20120416204815.GB24884@redhat.com Cc: <stable@vger.kernel.org> v3.3 Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>		2012-04-16 16:23:59 -07:00
..
boot	x86, efi: Add dedicated EFI stub entry point	2012-04-16 11:41:44 -07:00
configs	x86/kconfig: Remove CONFIG_TR=y from the defconfigs	2012-03-24 08:18:03 +01:00
crypto	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2012-03-22 20:19:30 -07:00
ia32	Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-29 18:21:35 -07:00
include/asm	x86/platform: Remove incorrect error message in x86_default_fixup_cpu_id()	2012-04-16 20:43:43 +02:00
kernel	i387: ptrace breaks the lazy-fpu-restore logic	2012-04-16 16:23:59 -07:00
kvm	KVM: VMX: vmx_set_cr0 expects kvm->srcu locked	2012-04-05 19:04:09 +03:00
lguest
lib	x86: merge 32/64-bit versions of 'strncpy_from_user()' and speed it up	2012-04-11 09:41:28 -07:00
math-emu
mm	Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-29 18:21:35 -07:00
net	bpf jit: Let the x86 jit handle negative offsets	2012-04-03 18:01:41 -04:00
oprofile
pci	Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci	2012-03-23 14:02:12 -07:00
platform	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-29 14:28:26 -07:00
power	x86, kvm: Call restore_sched_clock_state() only after %gs is initialized	2012-04-02 13:53:00 +02:00
syscalls	Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-29 18:12:23 -07:00
tools
um	um: Use asm-generic/switch_to.h	2012-04-10 00:13:45 +02:00
vdso	Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-29 18:12:23 -07:00
video
xen	Two fixes for regressions:	2012-04-06 17:54:53 -07:00
.gitignore
Kbuild
Kconfig	Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-03-29 18:12:23 -07:00
Kconfig.cpu
Kconfig.debug
Makefile	x86: Use -mno-avx when available	2012-03-30 10:06:39 -07:00
Makefile_32.cpu
Makefile.um	um: fix linker script generation	2012-04-09 13:59:00 -04:00