From 5a89f1adbc5ce44988aab0c370ae2f1478061307 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] sh: latencytop support.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
arch/sh/Kconfig | 4 ++++
arch/sh/kernel/stacktrace.c | 23 ++++++++++++++++++++++-
2 files changed, 26 insertions(+), 1 deletion(-)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index acaba1bdd8a64..18a1cc8a6aa3d 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 54d1f61aa0077..1a2a5eb76e41c 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);
--
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