Commit f7b548fa authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'x86-fixes-for-linus' of... 

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()
parents 95f9354b 889a7a6a

arch/x86/include/asm/percpu.h

+12 −12
Original line number Diff line number Diff line
@@ -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;							\

arch/x86/include/asm/system_64.h

deleted100644 → 0
+0 −22
Original line number Diff line number Diff line 
#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 */

arch/x86/kernel/dumpstack_64.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

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