linux-kernel - [PATCH] ftrace: unsigned idx cannot be less than 0

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Message-ID: <495E2987.3070501@gmail.com>
Date:	Fri, 02 Jan 2009 15:49:43 +0100
From:	Roel Kluin <roel.kluin@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH] ftrace: unsigned idx cannot be less than 0

// vi kernel/trace/ftrace.c +787
struct ftrace_iterator {
...
        unsigned                idx;
...
};

idx is unsigned and cannot be less than 0.

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 2f32969..a344add 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -842,7 +842,7 @@ static void *t_start(struct seq_file *m, loff_t *pos)
 	void *p = NULL;
 
 	if (*pos > 0) {
-		if (iter->idx < 0)
+		if (iter->idx == 0)
 			return p;
 		(*pos)--;
 		iter->idx--;
--
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