fs/gfs2: Use the enum req_op and blk_opf_t types

Improve static type checking by using the enum req_op type for variables
that represent a request operation and the new blk_opf_t type for
variables that represent request flags. Combine the first two
gfs2_submit_bhs() arguments into a single argument.

Reviewed-by: Andreas Gruenbacher <[email protected]>
Cc: Bob Peterson <[email protected]>
Signed-off-by: Bart Van Assche <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

fs/gfs2/log.c

@@ -823,7 +823,7 @@ void gfs2_flush_revokes(struct gfs2_sbd *sdp)
 
 void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
 			   u64 seq, u32 tail, u32 lblock, u32 flags,
-			   int op_flags)
+			   blk_opf_t op_flags)
 {
 	struct gfs2_log_header *lh;
 	u32 hash, crc;
@@ -905,7 +905,7 @@ void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
 
 static void log_write_header(struct gfs2_sbd *sdp, u32 flags)
 {
-	int op_flags = REQ_PREFLUSH | REQ_FUA | REQ_META | REQ_SYNC;
+	blk_opf_t op_flags = REQ_PREFLUSH | REQ_FUA | REQ_META | REQ_SYNC;
 	enum gfs2_freeze_state state = atomic_read(&sdp->sd_freeze_state);
 
 	gfs2_assert_withdraw(sdp, (state != SFS_FROZEN));

fs/gfs2/log.h

@@ -82,7 +82,7 @@ extern void gfs2_log_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
 			     unsigned int *extra_revokes);
 extern void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
 				  u64 seq, u32 tail, u32 lblock, u32 flags,
-				  int op_flags);
+				  blk_opf_t op_flags);
 extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
 			   u32 type);
 extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);

fs/gfs2/lops.c

@@ -238,7 +238,7 @@ static void gfs2_end_log_write(struct bio *bio)
  * there is no pending bio, then this is a no-op.
  */
 
-void gfs2_log_submit_bio(struct bio **biop, int opf)
+void gfs2_log_submit_bio(struct bio **biop, blk_opf_t opf)
 {
 	struct bio *bio = *biop;
 	if (bio) {
@@ -292,7 +292,7 @@ static struct bio *gfs2_log_alloc_bio(struct gfs2_sbd *sdp, u64 blkno,
  */
 
 static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno,
-				    struct bio **biop, int op,
+				    struct bio **biop, enum req_op op,
 				    bio_end_io_t *end_io, bool flush)
 {
 	struct bio *bio = *biop;

fs/gfs2/lops.h

@@ -16,7 +16,7 @@ extern u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lbn);
 extern void gfs2_log_write(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
 			   struct page *page, unsigned size, unsigned offset,
 			   u64 blkno);
-extern void gfs2_log_submit_bio(struct bio **biop, int opf);
+extern void gfs2_log_submit_bio(struct bio **biop, blk_opf_t opf);
 extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
 extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
 			   struct gfs2_log_header_host *head, bool keep_cache);

fs/gfs2/meta_io.c

@@ -34,7 +34,7 @@ static int gfs2_aspace_writepage(struct page *page, struct writeback_control *wb
 {
 	struct buffer_head *bh, *head;
 	int nr_underway = 0;
-	int write_flags = REQ_META | REQ_PRIO | wbc_to_write_flags(wbc);
+	blk_opf_t write_flags = REQ_META | REQ_PRIO | wbc_to_write_flags(wbc);
 
 	BUG_ON(!PageLocked(page));
 	BUG_ON(!page_has_buffers(page));
@@ -217,14 +217,13 @@ static void gfs2_meta_read_endio(struct bio *bio)
  * Submit several consecutive buffer head I/O requests as a single bio I/O
  * request.  (See submit_bh_wbc.)
  */
-static void gfs2_submit_bhs(int op, int op_flags, struct buffer_head *bhs[],
-			    int num)
+static void gfs2_submit_bhs(blk_opf_t opf, struct buffer_head *bhs[], int num)
 {
 	while (num > 0) {
 		struct buffer_head *bh = *bhs;
 		struct bio *bio;
 
-		bio = bio_alloc(bh->b_bdev, num, op | op_flags, GFP_NOIO);
+		bio = bio_alloc(bh->b_bdev, num, opf, GFP_NOIO);
 		bio->bi_iter.bi_sector = bh->b_blocknr * (bh->b_size >> 9);
 		while (num > 0) {
 			bh = *bhs;
@@ -288,7 +287,7 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
 		}
 	}
 
-	gfs2_submit_bhs(REQ_OP_READ, REQ_META | REQ_PRIO, bhs, num);
+	gfs2_submit_bhs(REQ_OP_READ | REQ_META | REQ_PRIO, bhs, num);
 	if (!(flags & DIO_WAIT))
 		return 0;