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Merge branch 'linus' into x86/x2apic

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Conflicts:
	arch/x86/kernel/cpu/cyrix.c
	include/asm-x86/cpufeature.h

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar
2008-09-04 13:02:35 +02:00
parent 11c231a962 d210baf53b
commit 42390cdec5
1474 changed files with 40763 additions and 14249 deletions
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23
include/asm-x86/processor.h
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@@ -729,6 +729,29 @@ extern unsigned long boot_option_idle_override;
extern unsigned long idle_halt;
extern unsigned long idle_nomwait;
/*
* on systems with caches, caches must be flashed as the absolute
* last instruction before going into a suspended halt. Otherwise,
* dirty data can linger in the cache and become stale on resume,
* leading to strange errors.
*
* perform a variety of operations to guarantee that the compiler
* will not reorder instructions. wbinvd itself is serializing
* so the processor will not reorder.
*
* Systems without cache can just go into halt.
*/
static inline void wbinvd_halt(void)
{
mb();
/* check for clflush to determine if wbinvd is legal */
if (cpu_has_clflush)
asm volatile("cli; wbinvd; 1: hlt; jmp 1b" : : : "memory");
else
while (1)
halt();
}
extern void enable_sep_cpu(void);
extern int sysenter_setup(void);