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Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip

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* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip:
  x86: prevent PGE flush from interruption/preemption
  x86: use explicit copy in vdso_gettimeofday()
  namespacecheck: automated fixes
  x86/xen: fix arbitrary_virt_to_machine()
  x86: don't read maxlvt before checking if APIC is mapped
  x86: disable TSC for sched_clock() when calibration failed
  x86: distangle user disabled TSC from unstable
  x86: fix setup of cyc2ns in tsc_64.c
This commit is contained in:
Linus Torvalds
2008-05-24 10:20:00 -07:00
parent d3c5f8b93f b1979a5fda
commit eb90d81d03
8 changed files with 38 additions and 21 deletions
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13
include/asm-x86/tlbflush.h
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@@ -22,12 +22,23 @@ static inline void __native_flush_tlb(void)
static inline void __native_flush_tlb_global(void)
{
unsigned long cr4 = read_cr4();
unsigned long flags;
unsigned long cr4;
/*
* Read-modify-write to CR4 - protect it from preemption and
* from interrupts. (Use the raw variant because this code can
* be called from deep inside debugging code.)
*/
raw_local_irq_save(flags);
cr4 = read_cr4();
/* clear PGE */
write_cr4(cr4 & ~X86_CR4_PGE);
/* write old PGE again and flush TLBs */
write_cr4(cr4);
raw_local_irq_restore(flags);
}
static inline void __native_flush_tlb_single(unsigned long addr)