From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 12 Sep 2008 16:44:03 +0000 (+0900)
Subject: sh: latencytop support.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5a89f1adbc5ce44988aab0c370ae2f1478061307;p=linux-beck.git

sh: latencytop support.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index acaba1bdd8a6..18a1cc8a6aa3 100644
--- a/arch/sh/Kconfig
+++ b/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/arch/sh/kernel/stacktrace.c b/arch/sh/kernel/stacktrace.c
index 54d1f61aa007..1a2a5eb76e41 100644
--- a/arch/sh/kernel/stacktrace.c
+++ b/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);