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

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* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Clear TS in irq_ts_save() when in an atomic section
  x86: Detect use of extended APIC ID for AMD CPUs
  x86: memtest: remove 64-bit division
  x86, UV: Fix macros for multiple coherency domains
  x86: Fix non-lazy GS handling in sys_vm86()
  x86: Add quirk for reboot stalls on a Dell Optiplex 360
  x86: Fix UV BAU activation descriptor init
This commit is contained in:
Linus Torvalds
2009-06-10 16:15:14 -07:00
parent bec706838e 0b8c3d5ab0
commit 9b29e8228a
11 changed files with 66 additions and 29 deletions
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12
arch/x86/include/asm/i387.h
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@@ -304,18 +304,18 @@ static inline void kernel_fpu_end(void)
/*
* Some instructions like VIA's padlock instructions generate a spurious
* DNA fault but don't modify SSE registers. And these instructions
* get used from interrupt context aswell. To prevent these kernel instructions
* in interrupt context interact wrongly with other user/kernel fpu usage, we
* get used from interrupt context as well. To prevent these kernel instructions
* in interrupt context interacting wrongly with other user/kernel fpu usage, we
* should use them only in the context of irq_ts_save/restore()
*/
static inline int irq_ts_save(void)
{
/*
* If we are in process context, we are ok to take a spurious DNA fault.
* Otherwise, doing clts() in process context require pre-emption to
* be disabled or some heavy lifting like kernel_fpu_begin()
* If in process context and not atomic, we can take a spurious DNA fault.
* Otherwise, doing clts() in process context requires disabling preemption
* or some heavy lifting like kernel_fpu_begin()
*/
if (!in_interrupt())
if (!in_atomic())
return 0;
if (read_cr0() & X86_CR0_TS) {