[PATCH 1/3] md: improve variable names in md_flush_request()

[Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>]

From: Pankaj Gupta <pankaj.gupta@xxxxxxxxxxxxxxx>

 This patch improves readability by using better variable names
 in flush request coalescing logic.

Signed-off-by: Pankaj Gupta <pankaj.gupta@xxxxxxxxxxxxxxx>
---
 drivers/md/md.c | 8 ++++----
 drivers/md/md.h | 6 +++---
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 98bac4f304ae..167c80f98533 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -639,7 +639,7 @@ static void md_submit_flush_data(struct work_struct *ws)
 	 * could wait for this and below md_handle_request could wait for those
 	 * bios because of suspend check
 	 */
-	mddev->last_flush = mddev->start_flush;
+	mddev->prev_flush_start = mddev->start_flush;
 	mddev->flush_bio = NULL;
 	wake_up(&mddev->sb_wait);
 
@@ -660,13 +660,13 @@ static void md_submit_flush_data(struct work_struct *ws)
  */
 bool md_flush_request(struct mddev *mddev, struct bio *bio)
 {
-	ktime_t start = ktime_get_boottime();
+	ktime_t req_start = ktime_get_boottime();
 	spin_lock_irq(&mddev->lock);
 	wait_event_lock_irq(mddev->sb_wait,
 			    !mddev->flush_bio ||
-			    ktime_after(mddev->last_flush, start),
+			    ktime_after(mddev->prev_flush_start, req_start),
 			    mddev->lock);
-	if (!ktime_after(mddev->last_flush, start)) {
+	if (!ktime_after(mddev->prev_flush_start, req_start)) {
 		WARN_ON(mddev->flush_bio);
 		mddev->flush_bio = bio;
 		bio = NULL;
diff --git a/drivers/md/md.h b/drivers/md/md.h
index ccfb69868c2e..2292c847f9dd 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -495,9 +495,9 @@ struct mddev {
 	 */
 	struct bio *flush_bio;
 	atomic_t flush_pending;
-	ktime_t start_flush, last_flush; /* last_flush is when the last completed
-					  * flush was started.
-					  */
+	ktime_t start_flush, prev_flush_start; /* prev_flush_start is when the previous completed
+						* flush was started.
+						*/
 	struct work_struct flush_work;
 	struct work_struct event_work;	/* used by dm to report failure event */
 	mempool_t *serial_info_pool;
-- 
2.20.1