fs: have submit_bh users pass in op and flags separately

This has submit_bh users pass in the operation and flags separately,
so submit_bh_wbc can setup the bio op and bi_rw flags on the bio that
is submitted.

Signed-off-by: Mike Christie <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Hannes Reinecke <[e-mail]>
Signed-off-by: Jens Axboe <[e-mail]>

drivers/md/bitmap.c

···
 			atomic_inc(&bitmap->pending_writes);
 			set_buffer_locked(bh);
 			set_buffer_mapped(bh);
-			submit_bh(WRITE | REQ_SYNC, bh);
+			submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
 			bh = bh->b_this_page;
 		}
 
···
 			atomic_inc(&bitmap->pending_writes);
 			set_buffer_locked(bh);
 			set_buffer_mapped(bh);
-			submit_bh(READ, bh);
+			submit_bh(REQ_OP_READ, 0, bh);
 		}
 		block++;
 		bh = bh->b_this_page;

fs/btrfs/check-integrity.c

···
 	return ds;
 }
 
-int btrfsic_submit_bh(int rw, struct buffer_head *bh)
+int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh)
 {
 	struct btrfsic_dev_state *dev_state;
 
 	if (!btrfsic_is_initialized)
-		return submit_bh(rw, bh);
+		return submit_bh(op, op_flags, bh);
 
 	mutex_lock(&btrfsic_mutex);
 	/* since btrfsic_submit_bh() might also be called before
···
 
 	/* Only called to write the superblock (incl. FLUSH/FUA) */
 	if (NULL != dev_state &&
-	    (rw & WRITE) && bh->b_size > 0) {
+	    (op == REQ_OP_WRITE) && bh->b_size > 0) {
 		u64 dev_bytenr;
 
 		dev_bytenr = 4096 * bh->b_blocknr;
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
 			printk(KERN_INFO
-			       "submit_bh(rw=0x%x, blocknr=%llu (bytenr %llu),"
-			       " size=%zu, data=%p, bdev=%p)\n",
-			       rw, (unsigned long long)bh->b_blocknr,
+			       "submit_bh(op=0x%x,0x%x, blocknr=%llu "
+			       "(bytenr %llu), size=%zu, data=%p, bdev=%p)\n",
+			       op, op_flags, (unsigned long long)bh->b_blocknr,
 			       dev_bytenr, bh->b_size, bh->b_data, bh->b_bdev);
 		btrfsic_process_written_block(dev_state, dev_bytenr,
 					      &bh->b_data, 1, NULL,
-					      NULL, bh, rw);
-	} else if (NULL != dev_state && (rw & REQ_FLUSH)) {
+					      NULL, bh, op_flags);
+	} else if (NULL != dev_state && (op_flags & REQ_FLUSH)) {
 		if (dev_state->state->print_mask &
 		    BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH)
 			printk(KERN_INFO
-			       "submit_bh(rw=0x%x FLUSH, bdev=%p)\n",
-			       rw, bh->b_bdev);
+			       "submit_bh(op=0x%x,0x%x FLUSH, bdev=%p)\n",
+			       op, op_flags, bh->b_bdev);
 		if (!dev_state->dummy_block_for_bio_bh_flush.is_iodone) {
 			if ((dev_state->state->print_mask &
 			     (BTRFSIC_PRINT_MASK_SUBMIT_BIO_BH |
···
 			block->never_written = 0;
 			block->iodone_w_error = 0;
 			block->flush_gen = dev_state->last_flush_gen + 1;
-			block->submit_bio_bh_rw = rw;
+			block->submit_bio_bh_rw = op_flags;
 			block->orig_bio_bh_private = bh->b_private;
 			block->orig_bio_bh_end_io.bh = bh->b_end_io;
 			block->next_in_same_bio = NULL;
···
 		}
 	}
 	mutex_unlock(&btrfsic_mutex);
-	return submit_bh(rw, bh);
+	return submit_bh(op, op_flags, bh);
 }
 
 static void __btrfsic_submit_bio(struct bio *bio)

fs/btrfs/check-integrity.h

···
 #define __BTRFS_CHECK_INTEGRITY__
 
 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
-int btrfsic_submit_bh(int rw, struct buffer_head *bh);
+int btrfsic_submit_bh(int op, int op_flags, struct buffer_head *bh);
 void btrfsic_submit_bio(struct bio *bio);
 int btrfsic_submit_bio_wait(struct bio *bio);
 #else

fs/btrfs/disk-io.c

···
 		 * to go down lazy.
 		 */
 		if (i == 0)
-			ret = btrfsic_submit_bh(WRITE_FUA, bh);
+			ret = btrfsic_submit_bh(REQ_OP_WRITE, WRITE_FUA, bh);
 		else
-			ret = btrfsic_submit_bh(WRITE_SYNC, bh);
+			ret = btrfsic_submit_bh(REQ_OP_WRITE, WRITE_SYNC, bh);
 		if (ret)
 			errors++;
 	}

fs/buffer.c

···
 #include <trace/events/block.h>
 
 static int fsync_buffers_list(spinlock_t *lock, struct list_head *list);
-static int submit_bh_wbc(int rw, struct buffer_head *bh,
+static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
 			 unsigned long bio_flags,
 			 struct writeback_control *wbc);
 
···
 	} else {
 		get_bh(bh);
 		bh->b_end_io = end_buffer_read_sync;
-		submit_bh(READ, bh);
+		submit_bh(REQ_OP_READ, 0, bh);
 		wait_on_buffer(bh);
 		if (buffer_uptodate(bh))
 			return bh;
···
 	struct buffer_head *bh, *head;
 	unsigned int blocksize, bbits;
 	int nr_underway = 0;
-	int write_op = (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE);
+	int write_flags = (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : 0);
 
 	head = create_page_buffers(page, inode,
 					(1 << BH_Dirty)|(1 << BH_Uptodate));
···
 	do {
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
-			submit_bh_wbc(write_op, bh, 0, wbc);
+			submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, 0, wbc);
 			nr_underway++;
 		}
 		bh = next;
···
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
 			clear_buffer_dirty(bh);
-			submit_bh_wbc(write_op, bh, 0, wbc);
+			submit_bh_wbc(REQ_OP_WRITE, write_flags, bh, 0, wbc);
 			nr_underway++;
 		}
 		bh = next;
···
 		if (buffer_uptodate(bh))
 			end_buffer_async_read(bh, 1);
 		else
-			submit_bh(READ, bh);
+			submit_bh(REQ_OP_READ, 0, bh);
 	}
 	return 0;
 }
···
 		if (block_start < from || block_end > to) {
 			lock_buffer(bh);
 			bh->b_end_io = end_buffer_read_nobh;
-			submit_bh(READ, bh);
+			submit_bh(REQ_OP_READ, 0, bh);
 			nr_reads++;
 		}
 	}
···
  * errors, this only handles the "we need to be able to
  * do IO at the final sector" case.
  */
-void guard_bio_eod(int rw, struct bio *bio)
+void guard_bio_eod(int op, struct bio *bio)
 {
 	sector_t maxsector;
 	struct bio_vec *bvec = &bio->bi_io_vec[bio->bi_vcnt - 1];
···
 	bvec->bv_len -= truncated_bytes;
 
 	/* ..and clear the end of the buffer for reads */
-	if ((rw & RW_MASK) == READ) {
+	if (op == REQ_OP_READ) {
 		zero_user(bvec->bv_page, bvec->bv_offset + bvec->bv_len,
 				truncated_bytes);
 	}
 }
 
-static int submit_bh_wbc(int rw, struct buffer_head *bh,
+static int submit_bh_wbc(int op, int op_flags, struct buffer_head *bh,
 			 unsigned long bio_flags, struct writeback_control *wbc)
 {
 	struct bio *bio;
···
 	/*
 	 * Only clear out a write error when rewriting
 	 */
-	if (test_set_buffer_req(bh) && (rw & WRITE))
+	if (test_set_buffer_req(bh) && (op == REQ_OP_WRITE))
 		clear_buffer_write_io_error(bh);
 
 	/*
···
 	bio->bi_flags |= bio_flags;
 
 	/* Take care of bh's that straddle the end of the device */
-	guard_bio_eod(rw, bio);
+	guard_bio_eod(op, bio);
 
 	if (buffer_meta(bh))
-		rw |= REQ_META;
+		op_flags |= REQ_META;
 	if (buffer_prio(bh))
-		rw |= REQ_PRIO;
-	bio->bi_rw = rw;
+		op_flags |= REQ_PRIO;
+	bio_set_op_attrs(bio, op, op_flags);
 
 	submit_bio(bio);
 	return 0;
 }
 
-int _submit_bh(int rw, struct buffer_head *bh, unsigned long bio_flags)
+int _submit_bh(int op, int op_flags, struct buffer_head *bh,
+	       unsigned long bio_flags)
 {
-	return submit_bh_wbc(rw, bh, bio_flags, NULL);
+	return submit_bh_wbc(op, op_flags, bh, bio_flags, NULL);
 }
 EXPORT_SYMBOL_GPL(_submit_bh);
 
-int submit_bh(int rw, struct buffer_head *bh)
+int submit_bh(int op, int op_flags,  struct buffer_head *bh)
 {
-	return submit_bh_wbc(rw, bh, 0, NULL);
+	return submit_bh_wbc(op, op_flags, bh, 0, NULL);
 }
 EXPORT_SYMBOL(submit_bh);
 
···
 			if (test_clear_buffer_dirty(bh)) {
 				bh->b_end_io = end_buffer_write_sync;
 				get_bh(bh);
-				submit_bh(WRITE, bh);
+				submit_bh(rw, 0, bh);
 				continue;
 			}
 		} else {
 			if (!buffer_uptodate(bh)) {
 				bh->b_end_io = end_buffer_read_sync;
 				get_bh(bh);
-				submit_bh(rw, bh);
+				submit_bh(rw, 0, bh);
 				continue;
 			}
 		}
···
 }
 EXPORT_SYMBOL(ll_rw_block);
 
-void write_dirty_buffer(struct buffer_head *bh, int rw)
+void write_dirty_buffer(struct buffer_head *bh, int op_flags)
 {
 	lock_buffer(bh);
 	if (!test_clear_buffer_dirty(bh)) {
···
 	}
 	bh->b_end_io = end_buffer_write_sync;
 	get_bh(bh);
-	submit_bh(rw, bh);
+	submit_bh(REQ_OP_WRITE, op_flags, bh);
 }
 EXPORT_SYMBOL(write_dirty_buffer);
 
···
  * and then start new I/O and then wait upon it.  The caller must have a ref on
  * the buffer_head.
  */
-int __sync_dirty_buffer(struct buffer_head *bh, int rw)
+int __sync_dirty_buffer(struct buffer_head *bh, int op_flags)
 {
 	int ret = 0;
 
···
 	if (test_clear_buffer_dirty(bh)) {
 		get_bh(bh);
 		bh->b_end_io = end_buffer_write_sync;
-		ret = submit_bh(rw, bh);
+		ret = submit_bh(REQ_OP_WRITE, op_flags, bh);
 		wait_on_buffer(bh);
 		if (!ret && !buffer_uptodate(bh))
 			ret = -EIO;
···
 
 	get_bh(bh);
 	bh->b_end_io = end_buffer_read_sync;
-	submit_bh(READ, bh);
+	submit_bh(REQ_OP_READ, 0, bh);
 	wait_on_buffer(bh);
 	if (buffer_uptodate(bh))
 		return 0;

fs/ext4/balloc.c

···
 	trace_ext4_read_block_bitmap_load(sb, block_group);
 	bh->b_end_io = ext4_end_bitmap_read;
 	get_bh(bh);
-	submit_bh(READ | REQ_META | REQ_PRIO, bh);
+	submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh);
 	return bh;
 verify:
 	err = ext4_validate_block_bitmap(sb, desc, block_group, bh);

fs/ext4/ialloc.c

···
 	trace_ext4_load_inode_bitmap(sb, block_group);
 	bh->b_end_io = ext4_end_bitmap_read;
 	get_bh(bh);
-	submit_bh(READ | REQ_META | REQ_PRIO, bh);
+	submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh);
 	wait_on_buffer(bh);
 	if (!buffer_uptodate(bh)) {
 		put_bh(bh);

fs/ext4/inode.c

···
 		trace_ext4_load_inode(inode);
 		get_bh(bh);
 		bh->b_end_io = end_buffer_read_sync;
-		submit_bh(READ | REQ_META | REQ_PRIO, bh);
+		submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh);
 		wait_on_buffer(bh);
 		if (!buffer_uptodate(bh)) {
 			EXT4_ERROR_INODE_BLOCK(inode, block,

fs/ext4/mmp.c

···
 	lock_buffer(bh);
 	bh->b_end_io = end_buffer_write_sync;
 	get_bh(bh);
-	submit_bh(WRITE_SYNC | REQ_META | REQ_PRIO, bh);
+	submit_bh(REQ_OP_WRITE, WRITE_SYNC | REQ_META | REQ_PRIO, bh);
 	wait_on_buffer(bh);
 	sb_end_write(sb);
 	if (unlikely(!buffer_uptodate(bh)))
···
 	get_bh(*bh);
 	lock_buffer(*bh);
 	(*bh)->b_end_io = end_buffer_read_sync;
-	submit_bh(READ_SYNC | REQ_META | REQ_PRIO, *bh);
+	submit_bh(REQ_OP_READ, READ_SYNC | REQ_META | REQ_PRIO, *bh);
 	wait_on_buffer(*bh);
 	if (!buffer_uptodate(*bh)) {
 		ret = -EIO;

fs/fat/misc.c

···
 	int i, err = 0;
 
 	for (i = 0; i < nr_bhs; i++)
-		write_dirty_buffer(bhs[i], WRITE);
+		write_dirty_buffer(bhs[i], 0);
 
 	for (i = 0; i < nr_bhs; i++) {
 		wait_on_buffer(bhs[i]);

fs/gfs2/bmap.c

···
 		if (trylock_buffer(rabh)) {
 			if (!buffer_uptodate(rabh)) {
 				rabh->b_end_io = end_buffer_read_sync;
-				submit_bh(READA | REQ_META, rabh);
+				submit_bh(REQ_OP_READ, READA | REQ_META, rabh);
 				continue;
 			}
 			unlock_buffer(rabh);

fs/gfs2/dir.c

···
 				continue;
 			}
 			bh->b_end_io = end_buffer_read_sync;
-			submit_bh(READA | REQ_META, bh);
+			submit_bh(REQ_OP_READ, READA | REQ_META, bh);
 			continue;
 		}
 		brelse(bh);

fs/gfs2/meta_io.c

···
 {
 	struct buffer_head *bh, *head;
 	int nr_underway = 0;
-	int write_op = REQ_META | REQ_PRIO |
-		(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE);
+	int write_flags = REQ_META | REQ_PRIO |
+		(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : 0);
 
 	BUG_ON(!PageLocked(page));
 	BUG_ON(!page_has_buffers(page));
···
 	do {
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
-			submit_bh(write_op, bh);
+			submit_bh(REQ_OP_WRITE, write_flags, bh);
 			nr_underway++;
 		}
 		bh = next;

fs/jbd2/commit.c

···
 
 	if (journal->j_flags & JBD2_BARRIER &&
 	    !jbd2_has_feature_async_commit(journal))
-		ret = submit_bh(WRITE_SYNC | WRITE_FLUSH_FUA, bh);
+		ret = submit_bh(REQ_OP_WRITE, WRITE_SYNC | WRITE_FLUSH_FUA, bh);
 	else
-		ret = submit_bh(WRITE_SYNC, bh);
+		ret = submit_bh(REQ_OP_WRITE, WRITE_SYNC, bh);
 
 	*cbh = bh;
 	return ret;
···
 				clear_buffer_dirty(bh);
 				set_buffer_uptodate(bh);
 				bh->b_end_io = journal_end_buffer_io_sync;
-				submit_bh(WRITE_SYNC, bh);
+				submit_bh(REQ_OP_WRITE, WRITE_SYNC, bh);
 			}
 			cond_resched();
 			stats.run.rs_blocks_logged += bufs;

fs/jbd2/journal.c

···
 	return jbd2_journal_start_thread(journal);
 }
 
-static int jbd2_write_superblock(journal_t *journal, int write_op)
+static int jbd2_write_superblock(journal_t *journal, int write_flags)
 {
 	struct buffer_head *bh = journal->j_sb_buffer;
 	journal_superblock_t *sb = journal->j_superblock;
 	int ret;
 
-	trace_jbd2_write_superblock(journal, write_op);
+	trace_jbd2_write_superblock(journal, write_flags);
 	if (!(journal->j_flags & JBD2_BARRIER))
-		write_op &= ~(REQ_FUA | REQ_FLUSH);
+		write_flags &= ~(REQ_FUA | REQ_FLUSH);
 	lock_buffer(bh);
 	if (buffer_write_io_error(bh)) {
 		/*
···
 	jbd2_superblock_csum_set(journal, sb);
 	get_bh(bh);
 	bh->b_end_io = end_buffer_write_sync;
-	ret = submit_bh(write_op, 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);

fs/nilfs2/btnode.c

···
 }
 
 int nilfs_btnode_submit_block(struct address_space *btnc, __u64 blocknr,
-			      sector_t pblocknr, int mode,
+			      sector_t pblocknr, int mode, int mode_flags,
 			      struct buffer_head **pbh, sector_t *submit_ptr)
 {
 	struct buffer_head *bh;
···
 		}
 	}
 
-	if (mode == READA) {
+	if (mode_flags & REQ_RAHEAD) {
 		if (pblocknr != *submit_ptr + 1 || !trylock_buffer(bh)) {
 			err = -EBUSY; /* internal code */
 			brelse(bh);
···
 	bh->b_blocknr = pblocknr; /* set block address for read */
 	bh->b_end_io = end_buffer_read_sync;
 	get_bh(bh);
-	submit_bh(mode, bh);
+	submit_bh(mode, mode_flags, bh);
 	bh->b_blocknr = blocknr; /* set back to the given block address */
 	*submit_ptr = pblocknr;
 	err = 0;

fs/nilfs2/btnode.h

···
 struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
 					      __u64 blocknr);
 int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int,
-			      struct buffer_head **, sector_t *);
+			      int, struct buffer_head **, sector_t *);
 void nilfs_btnode_delete(struct buffer_head *);
 int nilfs_btnode_prepare_change_key(struct address_space *,
 				    struct nilfs_btnode_chkey_ctxt *);

fs/nilfs2/btree.c

···
 	sector_t submit_ptr = 0;
 	int ret;
 
-	ret = nilfs_btnode_submit_block(btnc, ptr, 0, READ, &bh, &submit_ptr);
+	ret = nilfs_btnode_submit_block(btnc, ptr, 0, REQ_OP_READ, 0, &bh,
+					&submit_ptr);
 	if (ret) {
 		if (ret != -EEXIST)
 			return ret;
···
 		     n > 0 && i < ra->ncmax; n--, i++) {
 			ptr2 = nilfs_btree_node_get_ptr(ra->node, i, ra->ncmax);
 
-			ret = nilfs_btnode_submit_block(btnc, ptr2, 0, READA,
+			ret = nilfs_btnode_submit_block(btnc, ptr2, 0,
+							REQ_OP_READ, REQ_RAHEAD,
 							&ra_bh, &submit_ptr);
 			if (likely(!ret || ret == -EEXIST))
 				brelse(ra_bh);

fs/nilfs2/gcinode.c

···
 	bh->b_blocknr = pbn;
 	bh->b_end_io = end_buffer_read_sync;
 	get_bh(bh);
-	submit_bh(READ, bh);
+	submit_bh(REQ_OP_READ, 0, bh);
 	if (vbn)
 		bh->b_blocknr = vbn;
  out:
···
 	int ret;
 
 	ret = nilfs_btnode_submit_block(&NILFS_I(inode)->i_btnode_cache,
-					vbn ? : pbn, pbn, READ, out_bh, &pbn);
+					vbn ? : pbn, pbn, REQ_OP_READ, 0,
+					out_bh, &pbn);
 	if (ret == -EEXIST) /* internal code (cache hit) */
 		ret = 0;
 	return ret;

fs/nilfs2/mdt.c

···
 
 static int
 nilfs_mdt_submit_block(struct inode *inode, unsigned long blkoff,
-		       int mode, struct buffer_head **out_bh)
+		       int mode, int mode_flags, struct buffer_head **out_bh)
 {
 	struct buffer_head *bh;
 	__u64 blknum = 0;
···
 	if (buffer_uptodate(bh))
 		goto out;
 
-	if (mode == READA) {
+	if (mode_flags & REQ_RAHEAD) {
 		if (!trylock_buffer(bh)) {
 			ret = -EBUSY;
 			goto failed_bh;
···
 
 	bh->b_end_io = end_buffer_read_sync;
 	get_bh(bh);
-	submit_bh(mode, bh);
+	submit_bh(mode, mode_flags, bh);
 	ret = 0;
 
 	trace_nilfs2_mdt_submit_block(inode, inode->i_ino, blkoff, mode);
···
 	int i, nr_ra_blocks = NILFS_MDT_MAX_RA_BLOCKS;
 	int err;
 
-	err = nilfs_mdt_submit_block(inode, block, READ, &first_bh);
+	err = nilfs_mdt_submit_block(inode, block, REQ_OP_READ, 0, &first_bh);
 	if (err == -EEXIST) /* internal code */
 		goto out;
 
···
 	if (readahead) {
 		blkoff = block + 1;
 		for (i = 0; i < nr_ra_blocks; i++, blkoff++) {
-			err = nilfs_mdt_submit_block(inode, blkoff, READA, &bh);
+			err = nilfs_mdt_submit_block(inode, blkoff, REQ_OP_READ,
+						     REQ_RAHEAD, &bh);
 			if (likely(!err || err == -EEXIST))
 				brelse(bh);
 			else if (err != -EBUSY)

fs/ntfs/aops.c

···
 		for (i = 0; i < nr; i++) {
 			tbh = arr[i];
 			if (likely(!buffer_uptodate(tbh)))
-				submit_bh(READ, tbh);
+				submit_bh(REQ_OP_READ, 0, tbh);
 			else
 				ntfs_end_buffer_async_read(tbh, 1);
 		}
···
 	do {
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
-			submit_bh(WRITE, bh);
+			submit_bh(REQ_OP_WRITE, 0, bh);
 			need_end_writeback = false;
 		}
 		bh = next;
···
 		BUG_ON(!buffer_mapped(tbh));
 		get_bh(tbh);
 		tbh->b_end_io = end_buffer_write_sync;
-		submit_bh(WRITE, tbh);
+		submit_bh(REQ_OP_WRITE, 0, tbh);
 	}
 	/* Synchronize the mft mirror now if not @sync. */
 	if (is_mft && !sync)

fs/ntfs/compress.c

···
 		}
 		get_bh(tbh);
 		tbh->b_end_io = end_buffer_read_sync;
-		submit_bh(READ, tbh);
+		submit_bh(REQ_OP_READ, 0, tbh);
 	}
 
 	/* Wait for io completion on all buffer heads. */

fs/ntfs/file.c

···
 	lock_buffer(bh);
 	get_bh(bh);
 	bh->b_end_io = end_buffer_read_sync;
-	return submit_bh(READ, bh);
+	return submit_bh(REQ_OP_READ, 0, bh);
 }
 
 /**

fs/ntfs/logfile.c

···
 			 * completed ignore errors afterwards as we can assume
 			 * that if one buffer worked all of them will work.
 			 */
-			submit_bh(WRITE, bh);
+			submit_bh(REQ_OP_WRITE, 0, bh);
 			if (should_wait) {
 				should_wait = false;
 				wait_on_buffer(bh);

fs/ntfs/mft.c

···
 			clear_buffer_dirty(tbh);
 			get_bh(tbh);
 			tbh->b_end_io = end_buffer_write_sync;
-			submit_bh(WRITE, tbh);
+			submit_bh(REQ_OP_WRITE, 0, tbh);
 		}
 		/* Wait on i/o completion of buffers. */
 		for (i_bhs = 0; i_bhs < nr_bhs; i_bhs++) {
···
 		clear_buffer_dirty(tbh);
 		get_bh(tbh);
 		tbh->b_end_io = end_buffer_write_sync;
-		submit_bh(WRITE, tbh);
+		submit_bh(REQ_OP_WRITE, 0, tbh);
 	}
 	/* Synchronize the mft mirror now if not @sync. */
 	if (!sync && ni->mft_no < vol->mftmirr_size)

fs/ocfs2/buffer_head_io.c

···
 
 	get_bh(bh); /* for end_buffer_write_sync() */
 	bh->b_end_io = end_buffer_write_sync;
-	submit_bh(WRITE, bh);
+	submit_bh(REQ_OP_WRITE, 0, bh);
 
 	wait_on_buffer(bh);
 
···
 		clear_buffer_uptodate(bh);
 		get_bh(bh); /* for end_buffer_read_sync() */
 		bh->b_end_io = end_buffer_read_sync;
-		submit_bh(READ, bh);
+		submit_bh(REQ_OP_READ, 0, bh);
 	}
 
 	for (i = nr; i > 0; i--) {
···
 			if (validate)
 				set_buffer_needs_validate(bh);
 			bh->b_end_io = end_buffer_read_sync;
-			submit_bh(READ, bh);
+			submit_bh(REQ_OP_READ, 0, bh);
 			continue;
 		}
 	}
···
 	get_bh(bh); /* for end_buffer_write_sync() */
 	bh->b_end_io = end_buffer_write_sync;
 	ocfs2_compute_meta_ecc(osb->sb, bh->b_data, &di->i_check);
-	submit_bh(WRITE, bh);
+	submit_bh(REQ_OP_WRITE, 0, bh);
 
 	wait_on_buffer(bh);
 

fs/reiserfs/inode.c

···
 	do {
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
-			submit_bh(WRITE, bh);
+			submit_bh(REQ_OP_WRITE, 0, bh);
 			nr++;
 		}
 		put_bh(bh);
···
 		struct buffer_head *next = bh->b_this_page;
 		if (buffer_async_write(bh)) {
 			clear_buffer_dirty(bh);
-			submit_bh(WRITE, bh);
+			submit_bh(REQ_OP_WRITE, 0, bh);
 			nr++;
 		}
 		put_bh(bh);

fs/reiserfs/journal.c

···
 		BUG();
 	if (!buffer_uptodate(bh))
 		BUG();
-	submit_bh(WRITE, bh);
+	submit_bh(REQ_OP_WRITE, 0, bh);
 }
 
 static void submit_ordered_buffer(struct buffer_head *bh)
···
 	clear_buffer_dirty(bh);
 	if (!buffer_uptodate(bh))
 		BUG();
-	submit_bh(WRITE, bh);
+	submit_bh(REQ_OP_WRITE, 0, bh);
 }
 
 #define CHUNK_SIZE 32
···
 	/* flush out the real blocks */
 	for (i = 0; i < get_desc_trans_len(desc); i++) {
 		set_buffer_dirty(real_blocks[i]);
-		write_dirty_buffer(real_blocks[i], WRITE);
+		write_dirty_buffer(real_blocks[i], 0);
 	}
 	for (i = 0; i < get_desc_trans_len(desc); i++) {
 		wait_on_buffer(real_blocks[i]);

fs/ufs/util.c

···
 		unsigned i;
 
 		for (i = 0; i < ubh->count; i++)
-			write_dirty_buffer(ubh->bh[i], WRITE);
+			write_dirty_buffer(ubh->bh[i], 0);
 
 		for (i = 0; i < ubh->count; i++)
 			wait_on_buffer(ubh->bh[i]);

include/linux/buffer_head.h

···
 void __lock_buffer(struct buffer_head *bh);
 void ll_rw_block(int, int, struct buffer_head * bh[]);
 int sync_dirty_buffer(struct buffer_head *bh);
-int __sync_dirty_buffer(struct buffer_head *bh, int rw);
-void write_dirty_buffer(struct buffer_head *bh, int rw);
-int _submit_bh(int rw, struct buffer_head *bh, unsigned long bio_flags);
-int submit_bh(int, struct buffer_head *);
+int __sync_dirty_buffer(struct buffer_head *bh, int op_flags);
+void write_dirty_buffer(struct buffer_head *bh, int op_flags);
+int _submit_bh(int op, int op_flags, struct buffer_head *bh,
+	       unsigned long bio_flags);
+int submit_bh(int, int, struct buffer_head *);
 void write_boundary_block(struct block_device *bdev,
 			sector_t bblock, unsigned blocksize);
 int bh_uptodate_or_lock(struct buffer_head *bh);