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x86-64: Add prototype for old_rsp to a header file

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So far this has only been used in process_64.c, but the x32 code will
need it in additional code.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. J. Lu 2012-02-14 13:49:48 -08:00 committed by H. Peter Anvin
parent 0953f65d5d
commit d046ff8b30
1 changed files with 6 additions and 0 deletions
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6
arch/x86/include/asm/processor.h
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@ -948,6 +948,12 @@ extern unsigned long thread_saved_pc(struct task_struct *tsk);
#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
extern unsigned long KSTK_ESP(struct task_struct *task);
/*
* User space RSP while inside the SYSCALL fast path
*/
DECLARE_PER_CPU(unsigned long, old_rsp);
#endif /* CONFIG_X86_64 */
extern void start_thread(struct pt_regs *regs, unsigned long new_ip,