From dd8f0703788b9b892e7bf1cc5ed91077ec21d7a2 Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Sat, 13 Sep 2008 01:44:03 +0900
Subject: [PATCH] --- yaml --- r: 116130 b: refs/heads/master c:
 5a89f1adbc5ce44988aab0c370ae2f1478061307 h: refs/heads/master v: v3

---
 [refs]                            |  2 +-
 trunk/arch/sh/Kconfig             |  4 ++++
 trunk/arch/sh/kernel/stacktrace.c | 23 ++++++++++++++++++++++-
 3 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/[refs] b/[refs]
index 44873b6dfcb3..3fa2c952af3a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0e660d2d433393f983cd58fe8c54f831fa7c7713
+refs/heads/master: 5a89f1adbc5ce44988aab0c370ae2f1478061307
diff --git a/trunk/arch/sh/Kconfig b/trunk/arch/sh/Kconfig
index acaba1bdd8a6..18a1cc8a6aa3 100644
--- a/trunk/arch/sh/Kconfig
+++ b/trunk/arch/sh/Kconfig
@@ -100,6 +100,10 @@ config STACKTRACE_SUPPORT
 config LOCKDEP_SUPPORT
 	def_bool y
 
+config HAVE_LATENCYTOP_SUPPORT
+	def_bool y
+	depends on !SMP
+
 config ARCH_HAS_ILOG2_U32
 	def_bool n
 
diff --git a/trunk/arch/sh/kernel/stacktrace.c b/trunk/arch/sh/kernel/stacktrace.c
index 54d1f61aa007..1a2a5eb76e41 100644
--- a/trunk/arch/sh/kernel/stacktrace.c
+++ b/trunk/arch/sh/kernel/stacktrace.c
@@ -3,7 +3,7 @@
  *
  * Stack trace management functions
  *
- *  Copyright (C) 2006  Paul Mundt
+ *  Copyright (C) 2006 - 2008  Paul Mundt
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -36,3 +36,24 @@ void save_stack_trace(struct stack_trace *trace)
 	}
 }
 EXPORT_SYMBOL_GPL(save_stack_trace);
+
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
+{
+	unsigned long *sp = (unsigned long *)tsk->thread.sp;
+
+	while (!kstack_end(sp)) {
+		unsigned long addr = *sp++;
+
+		if (__kernel_text_address(addr)) {
+			if (in_sched_functions(addr))
+				break;
+			if (trace->skip > 0)
+				trace->skip--;
+			else
+				trace->entries[trace->nr_entries++] = addr;
+			if (trace->nr_entries >= trace->max_entries)
+				break;
+		}
+	}
+}
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);