From: H. J. Lu Date: Tue, 14 Feb 2012 21:49:48 +0000 (-0800) Subject: x86-64: Add prototype for old_rsp to a header file X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=d046ff8b30319d9aa38d877a0ba4206771e54346;p=deliverable%2Flinux.git 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 --- diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 9f748b5fb701..e34f95129f16 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,