linux-kernel - [PATCH] stacktrace: print_stack

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Date:	Fri, 13 Jun 2008 11:00:14 +0200
From:	Vegard Nossum <vegard.nossum@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Arjan van de Ven <arjan@...radead.org>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: [PATCH] stacktrace: print_stack_trace() cleanup

From: Vegard Nossum <vegard.nossum@...il.com>
Date: Fri, 13 Jun 2008 10:05:26 +0200
Subject: [PATCH] stacktrace: print_stack_trace() cleanup

This admittedly doesn't have too many benefits, these are the two I can
think of: shorter code and better atomicity with regards to printk().

(It's been tested with the backtrace self-test code on i386 and x86_64.)

Cc: Arjan van de Ven <arjan@...radead.org>
Cc: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Vegard Nossum <vegard.nossum@...il.com>
---
 kernel/stacktrace.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c
index b71816e..2ee264b 100644
--- a/kernel/stacktrace.c
+++ b/kernel/stacktrace.c
@@ -11,14 +11,11 @@
 
 void print_stack_trace(struct stack_trace *trace, int spaces)
 {
-	int i, j;
+	int i;
 
 	for (i = 0; i < trace->nr_entries; i++) {
-		unsigned long ip = trace->entries[i];
-
-		for (j = 0; j < spaces + 1; j++)
-			printk(" ");
-		print_ip_sym(ip);
+		printk("%*c", 1 + spaces, ' ');
+		print_ip_sym(trace->entries[i]);
 	}
 }
 
-- 
1.5.4.1

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