md: add a mddev_add_trace_msg helper

[linux-2.6-microblaze.git] / drivers / md / md.h

diff --git a/drivers/md/md.h b/drivers/md/md.h
index 928086b..e2e1ddd 100644 (file)
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -918,4 +918,10 @@ static inline void mddev_trace_remap(struct mddev *mddev, struct bio *bio,
                trace_block_bio_remap(bio, disk_devt(mddev->gendisk), sector);
 }
 
+#define mddev_add_trace_msg(mddev, fmt, args...)                       \
+do {                                                                   \
+       if ((mddev)->gendisk)                                           \
+               blk_add_trace_msg((mddev)->queue, fmt, ##args);         \
+} while (0)
+
 #endif /* _MD_MD_H */