block: get rid of bio_rw and READA
These two are confusing leftover of the old world order, combining
values of the REQ_OP_ and REQ_ namespaces. For callers that don't
special case we mostly just replace bi_rw with bio_data_dir or
op_is_write, except for the few cases where a switch over the REQ_OP_
values makes more sense. Any check for READA is replaced with an
explicit check for REQ_RAHEAD. Also remove the READA alias for
REQ_RAHEAD.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1830245..dc48866 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -178,9 +178,6 @@
* READ_SYNC A synchronous read. Device is not plugged, caller can
* immediately wait on this read without caring about
* unplugging.
- * READA Used for read-ahead operations. Lower priority, and the
- * block layer could (in theory) choose to ignore this
- * request if it runs into resource problems.
* WRITE A normal async write. Device will be plugged.
* WRITE_SYNC Synchronous write. Identical to WRITE, but passes down
* the hint that someone will be waiting on this IO
@@ -195,11 +192,9 @@
*
*/
#define RW_MASK REQ_OP_WRITE
-#define RWA_MASK REQ_RAHEAD
#define READ REQ_OP_READ
-#define WRITE RW_MASK
-#define READA RWA_MASK
+#define WRITE REQ_OP_WRITE
#define READ_SYNC REQ_SYNC
#define WRITE_SYNC (REQ_SYNC | REQ_NOIDLE)
@@ -2471,17 +2466,6 @@
}
/*
- * return READ, READA, or WRITE
- */
-static inline int bio_rw(struct bio *bio)
-{
- if (op_is_write(bio_op(bio)))
- return WRITE;
-
- return bio->bi_rw & RWA_MASK;
-}
-
-/*
* return data direction, READ or WRITE
*/
static inline int bio_data_dir(struct bio *bio)