From 7b6c6c77732ca1d2498eda7eabb64f9648896e96 Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Mon, 11 May 2009 17:03:00 -0400 Subject: x86, 32-bit: fix kernel_trap_sp() Use ®s->sp instead of regs for getting the top of stack in kernel mode. (on x86-64, regs->sp always points the top of stack) [ Impact: Oprofile decodes only stack for backtracing on i386 ] Signed-off-by: Masami Hiramatsu [ v2: rename the API to kernel_stack_pointer(), move variable inside ] Acked-by: Linus Torvalds Cc: systemtap@sources.redhat.com Cc: Harvey Harrison Cc: Jan Blunck Cc: Christoph Hellwig LKML-Reference: <20090511210300.17332.67549.stgit@localhost.localdomain> Signed-off-by: Ingo Molnar --- arch/x86/oprofile/backtrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/x86/oprofile') diff --git a/arch/x86/oprofile/backtrace.c b/arch/x86/oprofile/backtrace.c index 04df67f8a7b..044897be021 100644 --- a/arch/x86/oprofile/backtrace.c +++ b/arch/x86/oprofile/backtrace.c @@ -76,9 +76,9 @@ void x86_backtrace(struct pt_regs * const regs, unsigned int depth) { struct frame_head *head = (struct frame_head *)frame_pointer(regs); - unsigned long stack = kernel_trap_sp(regs); if (!user_mode_vm(regs)) { + unsigned long stack = kernel_stack_pointer(regs); if (depth) dump_trace(NULL, regs, (unsigned long *)stack, 0, &backtrace_ops, &depth); -- cgit v1.2.3