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Merge branches 'x86-cleanups-for-linus', 'x86-vmware-for-linus', 'x86-mtrr-for-linus', 'x86-apic-for-linus', 'x86-fpu-for-linus' and 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Clean up arch/x86/kernel/cpu/mtrr/cleanup.c: use ";" not "," to terminate statements

* 'x86-vmware-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, vmware: Preset lpj values when on VMware.

* 'x86-mtrr-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, mtrr: Use stop machine context to rendezvous all the cpu's

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86/apic/es7000_32: Remove unused variable

* 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Avoid unnecessary __clear_user() and xrstor in signal handling

* 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, vdso: Unmap vdso pages
This commit is contained in:
Linus Torvalds
2010-08-06 16:22:59 -07:00
parent ce06ea8339 b2691085d1 9f242dc10e 68f202e4e8 5bbd4a336c 8e221b6db4 be783a4721
commit 75cb5fdce2
9 changed files with 83 additions and 28 deletions
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10
arch/x86/include/asm/xsave.h
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@@ -65,6 +65,16 @@ static inline int fpu_xrstor_checking(struct fpu *fpu)
static inline int xsave_user(struct xsave_struct __user *buf)
{
int err;
/*
* Clear the xsave header first, so that reserved fields are
* initialized to zero.
*/
err = __clear_user(&buf->xsave_hdr,
sizeof(struct xsave_hdr_struct));
if (unlikely(err))
return -EFAULT;
__asm__ __volatile__("1: .byte " REX_PREFIX "0x0f,0xae,0x27\n"
"2:\n"
".section .fixup,\"ax\"\n"