OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

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

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  percpu, x86: Fix percpu_xchg_op()
  x86: Remove left over system_64.h
  x86-64: Don't use pointer to out-of-scope variable in dump_trace()
This commit is contained in:
Linus Torvalds 2011-01-28 06:43:41 +10:00
parent 95f9354b4c 889a7a6a5d
commit f7b548fa3d
3 changed files with 13 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
arch/x86/include/asm/percpu.h
View File

@ -273,34 +273,34 @@ do { \
typeof(var) pxo_new__ = (nval); \
switch (sizeof(var)) { \
case 1: \
asm("\n1:mov "__percpu_arg(1)",%%al" \
"\n\tcmpxchgb %2, "__percpu_arg(1) \
asm("\n\tmov "__percpu_arg(1)",%%al" \
"\n1:\tcmpxchgb %2, "__percpu_arg(1) \
"\n\tjnz 1b" \
: "=a" (pxo_ret__), "+m" (var) \
: "=&a" (pxo_ret__), "+m" (var) \
: "q" (pxo_new__) \
: "memory"); \
break; \
case 2: \
asm("\n1:mov "__percpu_arg(1)",%%ax" \
"\n\tcmpxchgw %2, "__percpu_arg(1) \
asm("\n\tmov "__percpu_arg(1)",%%ax" \
"\n1:\tcmpxchgw %2, "__percpu_arg(1) \
"\n\tjnz 1b" \
: "=a" (pxo_ret__), "+m" (var) \
: "=&a" (pxo_ret__), "+m" (var) \
: "r" (pxo_new__) \
: "memory"); \
break; \
case 4: \
asm("\n1:mov "__percpu_arg(1)",%%eax" \
"\n\tcmpxchgl %2, "__percpu_arg(1) \
asm("\n\tmov "__percpu_arg(1)",%%eax" \
"\n1:\tcmpxchgl %2, "__percpu_arg(1) \
"\n\tjnz 1b" \
: "=a" (pxo_ret__), "+m" (var) \
: "=&a" (pxo_ret__), "+m" (var) \
: "r" (pxo_new__) \
: "memory"); \
break; \
case 8: \
asm("\n1:mov "__percpu_arg(1)",%%rax" \
"\n\tcmpxchgq %2, "__percpu_arg(1) \
asm("\n\tmov "__percpu_arg(1)",%%rax" \
"\n1:\tcmpxchgq %2, "__percpu_arg(1) \
"\n\tjnz 1b" \
: "=a" (pxo_ret__), "+m" (var) \
: "=&a" (pxo_ret__), "+m" (var) \
: "r" (pxo_new__) \
: "memory"); \
break; \

22
arch/x86/include/asm/system_64.h
View File

@ -1,22 +0,0 @@
#ifndef _ASM_X86_SYSTEM_64_H
#define _ASM_X86_SYSTEM_64_H
#include <asm/segment.h>
#include <asm/cmpxchg.h>
static inline unsigned long read_cr8(void)
{
unsigned long cr8;
asm volatile("movq %%cr8,%0" : "=r" (cr8));
return cr8;
}
static inline void write_cr8(unsigned long val)
{
asm volatile("movq %0,%%cr8" :: "r" (val) : "memory");
}
#include <linux/irqflags.h>
#endif /* _ASM_X86_SYSTEM_64_H */

2
arch/x86/kernel/dumpstack_64.c
View File

@ -149,13 +149,13 @@ void dump_trace(struct task_struct *task,
unsigned used = 0;
struct thread_info *tinfo;
int graph = 0;
unsigned long dummy;
unsigned long bp;
if (!task)
task = current;
if (!stack) {
unsigned long dummy;
stack = &dummy;
if (task && task != current)
stack = (unsigned long *)task->thread.sp;