fs/buffer: Combine two submit_bh() and ll_rw_block() arguments

Both submit_bh() and ll_rw_block() accept a request operation type and request flags as their first two arguments. Micro-optimize these two functions by combining these first two arguments into a single argument. This patch does not change the behavior of any of the modified code. Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Jan Kara <jack@suse.cz> Acked-by: Song Liu <song@kernel.org> (for the md changes) Signed-off-by: Bart Van Assche <bvanassche@acm.org> Link: https://lore.kernel.org/r/20220714180729.1065367-48-bvanassche@acm.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
2026-01-06 12:30:45 -08:00 · 2022-07-14 11:07:13 -07:00
parent 3ae7286943
commit 1420c4a549
35 changed files with 88 additions and 90 deletions
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -302,7 +302,7 @@ static void write_page(struct bitmap *bitmap, struct page *page, int wait)
 			atomic_inc(&bitmap->pending_writes);
 			set_buffer_locked(bh);
 			set_buffer_mapped(bh);
-			submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
+			submit_bh(REQ_OP_WRITE | REQ_SYNC, bh);
 			bh = bh->b_this_page;
 		}

@@ -394,7 +394,7 @@ static int read_page(struct file *file, unsigned long index,
 			atomic_inc(&bitmap->pending_writes);
 			set_buffer_locked(bh);
 			set_buffer_mapped(bh);
-			submit_bh(REQ_OP_READ, 0, bh);
+			submit_bh(REQ_OP_READ, bh);
 		}
 		blk_cur++;
 		bh = bh->b_this_page;
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -52,8 +52,8 @@
 #include "internal.h"

 static int fsync_buffers_list(spinlock_t *lock, struct list_head *list);
-static int submit_bh_wbc(enum req_op op, blk_opf_t op_flags,
-			 struct buffer_head *bh, struct writeback_control *wbc);
+static int submit_bh_wbc(blk_opf_t opf, struct buffer_head *bh,
+			 struct writeback_control *wbc);

 #define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)

@@ -562,7 +562,7 @@ void write_boundary_block(struct block_device *bdev,
 	struct buffer_head *bh = __find_get_block(bdev, bblock + 1, blocksize);
 	if (bh) {
 		if (buffer_dirty(bh))
-			ll_rw_block(REQ_OP_WRITE, 0, 1, &bh);
+			ll_rw_block(REQ_OP_WRITE, 1, &bh);
 		put_bh(bh);
 	}
 }
@@ -1174,7 +1174,7 @@ static struct buffer_head *__bread_slow(struct buffer_head *bh)
 	} else {
 		get_bh(bh);
 		bh->b_end_io = end_buffer_read_sync;
-		submit_bh(REQ_OP_READ, 0, bh);
+		submit_bh(REQ_OP_READ, bh);
 		wait_on_buffer(bh);
 		if (buffer_uptodate(bh))
 			return bh;
@@ -1342,7 +1342,7 @@ void __breadahead(struct block_device *bdev, sector_t block, unsigned size)
 {
 	struct buffer_head *bh = __getblk(bdev, block, size);
 	if (likely(bh)) {
-		ll_rw_block(REQ_OP_READ, REQ_RAHEAD, 1, &bh);
+		ll_rw_block(REQ_OP_READ | REQ_RAHEAD, 1, &bh);
 		brelse(bh);
 	}
 }
@@ -1353,7 +1353,7 @@ void __breadahead_gfp(struct block_device *bdev, sector_t block, unsigned size,
 {
 	struct buffer_head *bh = __getblk_gfp(bdev, block, size, gfp);
 	if (likely(bh)) {
-		ll_rw_block(REQ_OP_READ, REQ_RAHEAD, 1, &bh);
+		ll_rw_block(REQ_OP_READ | REQ_RAHEAD, 1, &bh);
 		brelse(bh);
 	}
 }
@@ -1804,7 +1804,7 @@ int __block_write_full_page(struct inode *inode, struct page *page,
 	do {
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
-			submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc);
+			submit_bh_wbc(REQ_OP_WRITE | write_flags, bh, wbc);
 			nr_underway++;
 		}
 		bh = next;
@@ -1858,7 +1858,7 @@ recover:
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
 			clear_buffer_dirty(bh);
-			submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, wbc);
+			submit_bh_wbc(REQ_OP_WRITE | write_flags, bh, wbc);
 			nr_underway++;
 		}
 		bh = next;
@@ -2033,7 +2033,7 @@ int __block_write_begin_int(struct folio *folio, loff_t pos, unsigned len,
 		if (!buffer_uptodate(bh) && !buffer_delay(bh) &&
 		    !buffer_unwritten(bh) &&
 		     (block_start < from || block_end > to)) {
-			ll_rw_block(REQ_OP_READ, 0, 1, &bh);
+			ll_rw_block(REQ_OP_READ, 1, &bh);
 			*wait_bh++=bh;
 		}
 	}
@@ -2334,7 +2334,7 @@ int block_read_full_folio(struct folio *folio, get_block_t *get_block)
 		if (buffer_uptodate(bh))
 			end_buffer_async_read(bh, 1);
 		else
-			submit_bh(REQ_OP_READ, 0, bh);
+			submit_bh(REQ_OP_READ, bh);
 	}
 	return 0;
 }
@@ -2665,7 +2665,7 @@ int nobh_write_begin(struct address_space *mapping, loff_t pos, unsigned len,
 		if (block_start < from || block_end > to) {
 			lock_buffer(bh);
 			bh->b_end_io = end_buffer_read_nobh;
-			submit_bh(REQ_OP_READ, 0, bh);
+			submit_bh(REQ_OP_READ, bh);
 			nr_reads++;
 		}
 	}
@@ -2915,7 +2915,7 @@ int block_truncate_page(struct address_space *mapping,

 	if (!buffer_uptodate(bh) && !buffer_delay(bh) && !buffer_unwritten(bh)) {
 		err = -EIO;
-		ll_rw_block(REQ_OP_READ, 0, 1, &bh);
+		ll_rw_block(REQ_OP_READ, 1, &bh);
 		wait_on_buffer(bh);
 		/* Uhhuh. Read error. Complain and punt. */
 		if (!buffer_uptodate(bh))
@@ -2994,9 +2994,10 @@ static void end_bio_bh_io_sync(struct bio *bio)
 	bio_put(bio);
 }

-static int submit_bh_wbc(enum req_op op, blk_opf_t op_flags,
-			 struct buffer_head *bh, struct writeback_control *wbc)
+static int submit_bh_wbc(blk_opf_t opf, struct buffer_head *bh,
+			 struct writeback_control *wbc)
 {
+	const enum req_op op = opf & REQ_OP_MASK;
 	struct bio *bio;

 	BUG_ON(!buffer_locked(bh));
@@ -3012,11 +3013,11 @@ static int submit_bh_wbc(enum req_op op, blk_opf_t op_flags,
 		clear_buffer_write_io_error(bh);

 	if (buffer_meta(bh))
-		op_flags |= REQ_META;
+		opf |= REQ_META;
 	if (buffer_prio(bh))
-		op_flags |= REQ_PRIO;
+		opf |= REQ_PRIO;

-	bio = bio_alloc(bh->b_bdev, 1, op | op_flags, GFP_NOIO);
+	bio = bio_alloc(bh->b_bdev, 1, opf, GFP_NOIO);

 	fscrypt_set_bio_crypt_ctx_bh(bio, bh, GFP_NOIO);

@@ -3040,9 +3041,9 @@ static int submit_bh_wbc(enum req_op op, blk_opf_t op_flags,
 	return 0;
 }

-int submit_bh(enum req_op op, blk_opf_t op_flags, struct buffer_head *bh)
+int submit_bh(blk_opf_t opf, struct buffer_head *bh)
 {
-	return submit_bh_wbc(op, op_flags, bh, NULL);
+	return submit_bh_wbc(opf, bh, NULL);
 }
 EXPORT_SYMBOL(submit_bh);

@@ -3072,9 +3073,9 @@ EXPORT_SYMBOL(submit_bh);
 * All of the buffers must be for the same device, and must also be a
 * multiple of the current approved size for the device.
 */
-void ll_rw_block(enum req_op op, blk_opf_t op_flags, int nr,
-		 struct buffer_head *bhs[])
+void ll_rw_block(const blk_opf_t opf, int nr, struct buffer_head *bhs[])
 {
+	const enum req_op op = opf & REQ_OP_MASK;
 	int i;

 	for (i = 0; i < nr; i++) {
@@ -3086,14 +3087,14 @@ void ll_rw_block(enum req_op op, blk_opf_t op_flags, int nr,
 			if (test_clear_buffer_dirty(bh)) {
 				bh->b_end_io = end_buffer_write_sync;
 				get_bh(bh);
-				submit_bh(op, op_flags, bh);
+				submit_bh(opf, bh);
 				continue;
 			}
 		} else {
 			if (!buffer_uptodate(bh)) {
 				bh->b_end_io = end_buffer_read_sync;
 				get_bh(bh);
-				submit_bh(op, op_flags, bh);
+				submit_bh(opf, bh);
 				continue;
 			}
 		}
@@ -3111,7 +3112,7 @@ void write_dirty_buffer(struct buffer_head *bh, blk_opf_t op_flags)
 	}
 	bh->b_end_io = end_buffer_write_sync;
 	get_bh(bh);
-	submit_bh(REQ_OP_WRITE, op_flags, bh);
+	submit_bh(REQ_OP_WRITE | op_flags, bh);
 }
 EXPORT_SYMBOL(write_dirty_buffer);

@@ -3138,7 +3139,7 @@ int __sync_dirty_buffer(struct buffer_head *bh, blk_opf_t op_flags)

 		get_bh(bh);
 		bh->b_end_io = end_buffer_write_sync;
-		ret = submit_bh(REQ_OP_WRITE, op_flags, bh);
+		ret = submit_bh(REQ_OP_WRITE | op_flags, bh);
 		wait_on_buffer(bh);
 		if (!ret && !buffer_uptodate(bh))
 			ret = -EIO;
@@ -3366,7 +3367,7 @@ int bh_submit_read(struct buffer_head *bh)

 	get_bh(bh);
 	bh->b_end_io = end_buffer_read_sync;
-	submit_bh(REQ_OP_READ, 0, bh);
+	submit_bh(REQ_OP_READ, bh);
 	wait_on_buffer(bh);
 	if (buffer_uptodate(bh))
 		return 0;
--- a/fs/ext4/fast_commit.c
+++ b/fs/ext4/fast_commit.c
@@ -668,7 +668,7 @@ static void ext4_fc_submit_bh(struct super_block *sb, bool is_tail)
 	set_buffer_dirty(bh);
 	set_buffer_uptodate(bh);
 	bh->b_end_io = ext4_end_buffer_io_sync;
-	submit_bh(REQ_OP_WRITE, write_flags, bh);
+	submit_bh(REQ_OP_WRITE | write_flags, bh);
 	EXT4_SB(sb)->s_fc_bh = NULL;
 }

--- a/fs/ext4/mmp.c
+++ b/fs/ext4/mmp.c
@@ -52,7 +52,7 @@ static int write_mmp_block(struct super_block *sb, struct buffer_head *bh)
 	lock_buffer(bh);
 	bh->b_end_io = end_buffer_write_sync;
 	get_bh(bh);
-	submit_bh(REQ_OP_WRITE, REQ_SYNC | REQ_META | REQ_PRIO, bh);
+	submit_bh(REQ_OP_WRITE | REQ_SYNC | REQ_META | REQ_PRIO, bh);
 	wait_on_buffer(bh);
 	sb_end_write(sb);
 	if (unlikely(!buffer_uptodate(bh)))
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -171,7 +171,7 @@ static inline void __ext4_read_bh(struct buffer_head *bh, int op_flags,

 	bh->b_end_io = end_io ? end_io : end_buffer_read_sync;
 	get_bh(bh);
-	submit_bh(REQ_OP_READ, op_flags, bh);
+	submit_bh(REQ_OP_READ | op_flags, bh);
 }

 void ext4_read_bh_nowait(struct buffer_head *bh, int op_flags,
@@ -5939,8 +5939,8 @@ static int ext4_commit_super(struct super_block *sb)
 	/* Clear potential dirty bit if it was journalled update */
 	clear_buffer_dirty(sbh);
 	sbh->b_end_io = end_buffer_write_sync;
-	submit_bh(REQ_OP_WRITE,
-		  REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh);
+	submit_bh(REQ_OP_WRITE | REQ_SYNC |
+		  (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh);
 	wait_on_buffer(sbh);
 	if (buffer_write_io_error(sbh)) {
 		ext4_msg(sb, KERN_ERR, "I/O error while writing "
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -310,9 +310,8 @@ static void gfs2_metapath_ra(struct gfs2_glock *gl, __be64 *start, __be64 *end)
 		if (trylock_buffer(rabh)) {
 			if (!buffer_uptodate(rabh)) {
 				rabh->b_end_io = end_buffer_read_sync;
-				submit_bh(REQ_OP_READ,
-					  REQ_RAHEAD | REQ_META | REQ_PRIO,
-					  rabh);
+				submit_bh(REQ_OP_READ | REQ_RAHEAD | REQ_META |
+					  REQ_PRIO, rabh);
 				continue;
 			}
 			unlock_buffer(rabh);
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1508,9 +1508,8 @@ static void gfs2_dir_readahead(struct inode *inode, unsigned hsize, u32 index,
 				continue;
 			}
 			bh->b_end_io = end_buffer_read_sync;
-			submit_bh(REQ_OP_READ,
-				  REQ_RAHEAD | REQ_META | REQ_PRIO,
-				  bh);
+			submit_bh(REQ_OP_READ | REQ_RAHEAD | REQ_META |
+				  REQ_PRIO, bh);
 			continue;
 		}
 		brelse(bh);
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -75,7 +75,7 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
 	do {
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
-			submit_bh(REQ_OP_WRITE, write_flags, bh);
+			submit_bh(REQ_OP_WRITE | write_flags, bh);
 			nr_underway++;
 		}
 		bh = next;
@@ -527,7 +527,7 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
 	if (buffer_uptodate(first_bh))
 		goto out;
 	if (!buffer_locked(first_bh))
-		ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &first_bh);
+		ll_rw_block(REQ_OP_READ | REQ_META | REQ_PRIO, 1, &first_bh);

 	dblock++;
 	extlen--;
@@ -536,9 +536,8 @@ struct buffer_head *gfs2_meta_ra(struct gfs2_glock *gl, u64 dblock, u32 extlen)
 		bh = gfs2_getbuf(gl, dblock, CREATE);

 		if (!buffer_uptodate(bh) && !buffer_locked(bh))
-			ll_rw_block(REQ_OP_READ,
-				    REQ_RAHEAD | REQ_META | REQ_PRIO,
-				    1, &bh);
+			ll_rw_block(REQ_OP_READ | REQ_RAHEAD | REQ_META |
+				    REQ_PRIO, 1, &bh);
 		brelse(bh);
 		dblock++;
 		extlen--;
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -746,7 +746,7 @@ static int gfs2_write_buf_to_page(struct gfs2_inode *ip, unsigned long index,
 		if (PageUptodate(page))
 			set_buffer_uptodate(bh);
 		if (!buffer_uptodate(bh)) {
-			ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &bh);
+			ll_rw_block(REQ_OP_READ | REQ_META | REQ_PRIO, 1, &bh);
 			wait_on_buffer(bh);
 			if (!buffer_uptodate(bh))
 				goto unlock_out;
--- a/fs/isofs/compress.c
+++ b/fs/isofs/compress.c
@@ -82,7 +82,7 @@ static loff_t zisofs_uncompress_block(struct inode *inode, loff_t block_start,
 		return 0;
 	}
 	haveblocks = isofs_get_blocks(inode, blocknum, bhs, needblocks);
-	ll_rw_block(REQ_OP_READ, 0, haveblocks, bhs);
+	ll_rw_block(REQ_OP_READ, haveblocks, bhs);

 	curbh = 0;
 	curpage = 0;
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -155,10 +155,10 @@ 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);
+		ret = submit_bh(REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH |
+				REQ_FUA, bh);
 	else
-		ret = submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
+		ret = submit_bh(REQ_OP_WRITE | REQ_SYNC, bh);

 	*cbh = bh;
 	return ret;
@@ -763,7 +763,7 @@ start_journal_io:
 				clear_buffer_dirty(bh);
 				set_buffer_uptodate(bh);
 				bh->b_end_io = journal_end_buffer_io_sync;
-				submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
+				submit_bh(REQ_OP_WRITE | REQ_SYNC, bh);
 			}
 			cond_resched();

--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1638,7 +1638,7 @@ static int jbd2_write_superblock(journal_t *journal, int 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);
+	ret = submit_bh(REQ_OP_WRITE | write_flags, bh);
 	wait_on_buffer(bh);
 	if (buffer_write_io_error(bh)) {
 		clear_buffer_write_io_error(bh);
@@ -1900,7 +1900,7 @@ static int journal_get_superblock(journal_t *journal)

 	J_ASSERT(bh != NULL);
 	if (!buffer_uptodate(bh)) {
-		ll_rw_block(REQ_OP_READ, 0, 1, &bh);
+		ll_rw_block(REQ_OP_READ, 1, &bh);
 		wait_on_buffer(bh);
 		if (!buffer_uptodate(bh)) {
 			printk(KERN_ERR
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -100,7 +100,7 @@ static int do_readahead(journal_t *journal, unsigned int start)
 		if (!buffer_uptodate(bh) && !buffer_locked(bh)) {
 			bufs[nbufs++] = bh;
 			if (nbufs == MAXBUF) {
-				ll_rw_block(REQ_OP_READ, 0, nbufs, bufs);
+				ll_rw_block(REQ_OP_READ, nbufs, bufs);
 				journal_brelse_array(bufs, nbufs);
 				nbufs = 0;
 			}
@@ -109,7 +109,7 @@ static int do_readahead(journal_t *journal, unsigned int start)
 	}

 	if (nbufs)
-		ll_rw_block(REQ_OP_READ, 0, nbufs, bufs);
+		ll_rw_block(REQ_OP_READ, nbufs, bufs);
 	err = 0;

 failed:
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -122,7 +122,7 @@ int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
 	bh->b_blocknr = pblocknr; /* set block address for read */
 	bh->b_end_io = end_buffer_read_sync;
 	get_bh(bh);
-	submit_bh(mode, mode_flags, bh);
+	submit_bh(mode | mode_flags, bh);
 	bh->b_blocknr = blocknr; /* set back to the given block address */
 	*submit_ptr = pblocknr;
 	err = 0;
--- a/fs/nilfs2/gcinode.c
+++ b/fs/nilfs2/gcinode.c
@@ -92,7 +92,7 @@ int nilfs_gccache_submit_read_data(struct inode *inode, sector_t blkoff,
 	bh->b_blocknr = pbn;
 	bh->b_end_io = end_buffer_read_sync;
 	get_bh(bh);
-	submit_bh(REQ_OP_READ, 0, bh);
+	submit_bh(REQ_OP_READ, bh);
 	if (vbn)
 		bh->b_blocknr = vbn;
 out:
--- a/fs/nilfs2/mdt.c
+++ b/fs/nilfs2/mdt.c
@@ -148,7 +148,7 @@ nilfs_mdt_submit_block(struct inode *inode, unsigned long blkoff,

 	bh->b_end_io = end_buffer_read_sync;
 	get_bh(bh);
-	submit_bh(mode, mode_flags, bh);
+	submit_bh(mode | mode_flags, bh);
 	ret = 0;

 	trace_nilfs2_mdt_submit_block(inode, inode->i_ino, blkoff, mode);
--- a/fs/ntfs/aops.c
+++ b/fs/ntfs/aops.c
@@ -342,7 +342,7 @@ handle_zblock:
 		for (i = 0; i < nr; i++) {
 			tbh = arr[i];
 			if (likely(!buffer_uptodate(tbh)))
-				submit_bh(REQ_OP_READ, 0, tbh);
+				submit_bh(REQ_OP_READ, tbh);
 			else
 				ntfs_end_buffer_async_read(tbh, 1);
 		}
@@ -859,7 +859,7 @@ lock_retry_remap:
 	do {
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
-			submit_bh(REQ_OP_WRITE, 0, bh);
+			submit_bh(REQ_OP_WRITE, bh);
 			need_end_writeback = false;
 		}
 		bh = next;
@@ -1187,7 +1187,7 @@ lock_retry_remap:
 		BUG_ON(!buffer_mapped(tbh));
 		get_bh(tbh);
 		tbh->b_end_io = end_buffer_write_sync;
-		submit_bh(REQ_OP_WRITE, 0, tbh);
+		submit_bh(REQ_OP_WRITE, tbh);
 	}
 	/* Synchronize the mft mirror now if not @sync. */
 	if (is_mft && !sync)
--- a/fs/ntfs/compress.c
+++ b/fs/ntfs/compress.c
@@ -658,7 +658,7 @@ lock_retry_remap:
 		}
 		get_bh(tbh);
 		tbh->b_end_io = end_buffer_read_sync;
-		submit_bh(REQ_OP_READ, 0, tbh);
+		submit_bh(REQ_OP_READ, tbh);
 	}

 	/* Wait for io completion on all buffer heads. */
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -537,7 +537,7 @@ static inline int ntfs_submit_bh_for_read(struct buffer_head *bh)
 	lock_buffer(bh);
 	get_bh(bh);
 	bh->b_end_io = end_buffer_read_sync;
-	return submit_bh(REQ_OP_READ, 0, bh);
+	return submit_bh(REQ_OP_READ, bh);
 }

 /**
--- a/fs/ntfs/logfile.c
+++ b/fs/ntfs/logfile.c
@@ -807,7 +807,7 @@ map_vcn:
 			 * completed ignore errors afterwards as we can assume
 			 * that if one buffer worked all of them will work.
 			 */
-			submit_bh(REQ_OP_WRITE, 0, bh);
+			submit_bh(REQ_OP_WRITE, bh);
 			if (should_wait) {
 				should_wait = false;
 				wait_on_buffer(bh);
--- a/Show More
+++ b/Show More