[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>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 27122575d902..3696f2f7126d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -784,8 +784,9 @@ struct task_struct {
         struct prio_array *array;
 
         unsigned short ioprio;
+#ifdef CONFIG_BLK_DEV_IO_TRACE
         unsigned int btrace_seq;
-
+#endif
         unsigned long sleep_avg;
         unsigned long long timestamp, last_ran;
         unsigned long long sched_time; /* sched_clock time spent running */