From 6c5c934153513dc72e2d6464f39e8ef1f27c0a3e Mon Sep 17 00:00:00 2001
From: Alexey Dobriyan <adobriyan@gmail.com>
Date: Fri, 29 Sep 2006 01:59:40 -0700
Subject: [PATCH] ifdef blktrace debugging fields

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 block/blktrace.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'block/blktrace.c')

diff --git a/block/blktrace.c b/block/blktrace.c
index 2b4ef2b89b8..8ff33441d8a 100644
--- a/block/blktrace.c
+++ b/block/blktrace.c
@@ -450,8 +450,10 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
  **/
 void blk_trace_shutdown(request_queue_t *q)
 {
-	blk_trace_startstop(q, 0);
-	blk_trace_remove(q);
+	if (q->blk_trace) {
+		blk_trace_startstop(q, 0);
+		blk_trace_remove(q);
+	}
 }
 
 /*
-- 
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