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| author | H. J. Lu <hjl.tools@gmail.com> | 2012-02-14 13:49:48 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2012-02-20 12:48:48 -0800 |
| commit | d046ff8b30319d9aa38d877a0ba4206771e54346 (patch) | |
| tree | 9d53f5a886b895eca0df95f38d3afffd45ab340a /arch/x86/include/asm/processor.h | |
| parent | 0953f65d5db728df0fdc3d510a71fd811a3be758 (diff) | |
x86-64: Add prototype for old_rsp to a header file
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>
Diffstat (limited to 'arch/x86/include/asm/processor.h')
| -rw-r--r-- | arch/x86/include/asm/processor.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 9f748b5fb70..e34f95129f1 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -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, |