From 22062a96300dabfef93368a28c34bdf35c9b8308 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 5 Nov 2012 13:00:27 -0500 Subject: new helper: signal_pt_regs() Always equal to task_pt_regs(current); defined only when we are in signal delivery. It may be different from current_pt_regs() - e.g. architectures like m68k may have pt_regs location on exception different from that on a syscall and signals (just as ptrace handling) may happen on exceptions as well as on syscalls. When they are equal, it's often better to have signal_pt_regs defined (in asm/ptrace.h) as current_pt_regs - that tends to be optimized better than default would be. However, optimisation is the only reason why we might want an arch-specific definition; if current_pt_regs() and task_pt_regs(current) have different values, the latter one is right. Signed-off-by: Al Viro --- arch/alpha/include/asm/ptrace.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/alpha/include') diff --git a/arch/alpha/include/asm/ptrace.h b/arch/alpha/include/asm/ptrace.h index b87755a19554..b4c5b2fbb647 100644 --- a/arch/alpha/include/asm/ptrace.h +++ b/arch/alpha/include/asm/ptrace.h @@ -78,6 +78,7 @@ struct switch_stack { #define current_pt_regs() \ ((struct pt_regs *) ((char *)current_thread_info() + 2*PAGE_SIZE) - 1) +#define signal_pt_regs current_pt_regs #define force_successful_syscall_return() (current_pt_regs()->r0 = 0) -- cgit v1.2.3