[tip:x86/cleanups] x86, dumpstack: Use frame pointer during stack trace

[tip-bot for Namhyung Kim]

Commit-ID:  2f8058ae197236f9d5641850ce27f67d8f3e0b39
Gitweb:     http://git.kernel.org/tip/2f8058ae197236f9d5641850ce27f67d8f3e0b39
Author:     Namhyung Kim <namhyung@xxxxxxxxx>
AuthorDate: Tue, 8 Mar 2011 20:44:22 +0900
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Thu, 10 Mar 2011 23:20:30 +0100

x86, dumpstack: Use frame pointer during stack trace

If CONFIG_FRAME_POINTER is set then use the frame pointer for the
stack backtrace rather than scanning whole stack blindly.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
LKML-Reference: <1299584662-24421-4-git-send-email-namhyung@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 arch/x86/kernel/dumpstack.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 38b74a5e..56db27d 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -170,7 +170,11 @@ static const struct stacktrace_ops print_trace_ops = {
 	.warning_symbol		= print_trace_warning_symbol,
 	.stack			= print_trace_stack,
 	.address		= print_trace_address,
+#ifdef CONFIG_FRAME_POINTER
+	.walk_stack		= walk_context_stack_bp,
+#else
 	.walk_stack		= walk_context_stack,
+#endif
 };
 
 void
--
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