[PATCHv3 1/4] jbd2: Drop useless return value of submit_bh

["Ritesh Harjani (IBM)" <ritesh.list@gmail.com>]

submit_bh always returns 0. This patch cleans up 2 of it's caller
in jbd2 to drop submit_bh's useless return value.
Once all submit_bh callers are cleaned up, we can make it's return
type as void.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
---
 fs/jbd2/commit.c  | 10 ++++------
 fs/jbd2/journal.c |  9 ++++-----
 2 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index b2b2bc9b88d9..6b51d2dc56e2 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -122,8 +122,8 @@ static int journal_submit_commit_record(journal_t *journal,
 {
 	struct commit_header *tmp;
 	struct buffer_head *bh;
-	int ret;
 	struct timespec64 now;
+	blk_opf_t write_flags = REQ_OP_WRITE | REQ_SYNC;
 
 	*cbh = NULL;
 
@@ -155,13 +155,11 @@ static int journal_submit_commit_record(journal_t *journal,
 
 	if (journal->j_flags & JBD2_BARRIER &&
 	    !jbd2_has_feature_async_commit(journal))
-		ret = submit_bh(REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH |
-				REQ_FUA, bh);
-	else
-		ret = submit_bh(REQ_OP_WRITE | REQ_SYNC, bh);
+		write_flags |= REQ_PREFLUSH | REQ_FUA;
 
+	submit_bh(write_flags, bh);
 	*cbh = bh;
-	return ret;
+	return 0;
 }
 
 /*
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 6350d3857c89..f669ae1ff7a2 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1606,7 +1606,7 @@ static int jbd2_write_superblock(journal_t *journal, blk_opf_t write_flags)
 {
 	struct buffer_head *bh = journal->j_sb_buffer;
 	journal_superblock_t *sb = journal->j_superblock;
-	int ret;
+	int ret = 0;
 
 	/* Buffer got discarded which means block device got invalidated */
 	if (!buffer_mapped(bh)) {
@@ -1636,7 +1636,7 @@ static int jbd2_write_superblock(journal_t *journal, blk_opf_t write_flags)
 		sb->s_checksum = jbd2_superblock_csum(journal, sb);
 	get_bh(bh);
 	bh->b_end_io = end_buffer_write_sync;
-	ret = submit_bh(REQ_OP_WRITE | write_flags, bh);
+	submit_bh(REQ_OP_WRITE | write_flags, bh);
 	wait_on_buffer(bh);
 	if (buffer_write_io_error(bh)) {
 		clear_buffer_write_io_error(bh);
@@ -1644,9 +1644,8 @@ static int jbd2_write_superblock(journal_t *journal, blk_opf_t write_flags)
 		ret = -EIO;
 	}
 	if (ret) {
-		printk(KERN_ERR "JBD2: Error %d detected when updating "
-		       "journal superblock for %s.\n", ret,
-		       journal->j_devname);
+		printk(KERN_ERR "JBD2: I/O error when updating journal superblock for %s.\n",
+				journal->j_devname);
 		if (!is_journal_aborted(journal))
 			jbd2_journal_abort(journal, ret);
 	}
-- 
2.35.3