linux-kernel - [PATCH]trace: fix wrong help information about snapshot

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Date:	Thu, 12 Sep 2013 23:04:01 +0800
From:	Wang YanQing <udknight@...il.com>
To:	rostedt@...dmis.org
Cc:	fweisbec@...il.com, mingo@...hat.com, linux-kernel@...r.kernel.org
Subject: [PATCH]trace: fix wrong help information about snapshot


Cat snapshot give me:
" tracer: nop

 * Snapshot is freed *

 Snapshot commands:
 echo 0 > snapshot : Clears and frees snapshot buffer
 echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.
                      Takes a snapshot of the main buffer.
 echo 2 > snapshot : Clears snapshot buffer (but does not allocate)
                      (Doesn't have to be '2' works with any number that
                       is not a '0' or '1')"

But after read the code, I found the right information about "echo 2 > snapshot"
should looks like below:

" echo 2 > snapshot : Clears snapshot buffer (but does not free)
                      (Doesn't have to be '2' works with any number that
                       is not a '0' or '1')"

Signed-off-by: Wang YanQing <udknight@...il.com>
---
 kernel/trace/trace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 7974ba2..d0da660 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2760,7 +2760,7 @@ static void show_snapshot_main_help(struct seq_file *m)
 	seq_printf(m, "# echo 0 > snapshot : Clears and frees snapshot buffer\n");
 	seq_printf(m, "# echo 1 > snapshot : Allocates snapshot buffer, if not already allocated.\n");
 	seq_printf(m, "#                      Takes a snapshot of the main buffer.\n");
-	seq_printf(m, "# echo 2 > snapshot : Clears snapshot buffer (but does not allocate)\n");
+	seq_printf(m, "# echo 2 > snapshot : Clears snapshot buffer (but does not free)\n");
 	seq_printf(m, "#                      (Doesn't have to be '2' works with any number that\n");
 	seq_printf(m, "#                       is not a '0' or '1')\n");
 }
-- 
1.7.12.4.dirty
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