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authorChristoph Hellwig <hch@lst.de>2016-07-19 12:28:41 +0300
committerJens Axboe <axboe@fb.com>2016-07-21 02:37:01 +0300
commit70246286e94c335b5bea0cbc68a17a96dd620281 (patch)
tree6333c1ba1ce00b3a3a2254acc34db552ae9c4159 /fs/buffer.c
parent3f40bf2c89223192535a72a4d49ce7d68d8ed9dd (diff)
downloadlinux-70246286e94c335b5bea0cbc68a17a96dd620281.tar.xz
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>
Diffstat (limited to 'fs/buffer.c')
-rw-r--r--fs/buffer.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 373aacb4f4c1..c24201e78492 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -153,7 +153,7 @@ static void __end_buffer_read_notouch(struct buffer_head *bh, int uptodate)
if (uptodate) {
set_buffer_uptodate(bh);
} else {
- /* This happens, due to failed READA attempts. */
+ /* This happens, due to failed read-ahead attempts. */
clear_buffer_uptodate(bh);
}
unlock_buffer(bh);
@@ -1395,7 +1395,7 @@ 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, READA, 1, &bh);
+ ll_rw_block(REQ_OP_READ, REQ_RAHEAD, 1, &bh);
brelse(bh);
}
}
@@ -3052,14 +3052,14 @@ EXPORT_SYMBOL(submit_bh);
/**
* ll_rw_block: low-level access to block devices (DEPRECATED)
* @op: whether to %READ or %WRITE
- * @op_flags: rq_flag_bits or %READA (readahead)
+ * @op_flags: rq_flag_bits
* @nr: number of &struct buffer_heads in the array
* @bhs: array of pointers to &struct buffer_head
*
* ll_rw_block() takes an array of pointers to &struct buffer_heads, and
- * requests an I/O operation on them, either a %READ or a %WRITE. The third
- * %READA option is described in the documentation for generic_make_request()
- * which ll_rw_block() calls.
+ * requests an I/O operation on them, either a %REQ_OP_READ or a %REQ_OP_WRITE.
+ * @op_flags contains flags modifying the detailed I/O behavior, most notably
+ * %REQ_RAHEAD.
*
* This function drops any buffer that it cannot get a lock on (with the
* BH_Lock state bit), any buffer that appears to be clean when doing a write