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block: get rid of bio_rw and READA

Browse source 
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 <[email protected]>
Reviewed-by: Johannes Thumshirn <[email protected]>
Reviewed-by: Mike Christie <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christoph Hellwig 2016-07-19 11:28:41 +02:00 • committed by Jens Axboe
commit 70246286e9
26 changed files with 95 additions and 96 deletions
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3
fs/gfs2/bmap.c
View file

@ -285,7 +285,8 @@ static void gfs2_metapath_ra(struct gfs2_glock *gl,
if (trylock_buffer(rabh)) {
if (!buffer_uptodate(rabh)) {
rabh->b_end_io = end_buffer_read_sync;
submit_bh(REQ_OP_READ, READA | REQ_META, rabh);
submit_bh(REQ_OP_READ, REQ_RAHEAD | REQ_META,
rabh);
continue;
}
unlock_buffer(rabh);

2
fs/gfs2/dir.c
View file

@ -1513,7 +1513,7 @@ 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, READA | REQ_META, bh);
submit_bh(REQ_OP_READ, REQ_RAHEAD | REQ_META, bh);
continue;
}
brelse(bh);

2
fs/gfs2/meta_io.c
View file

@ -459,7 +459,7 @@ 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, READA | REQ_META, 1, &bh);
ll_rw_block(REQ_OP_READ, REQ_RAHEAD | REQ_META, 1, &bh);
brelse(bh);
dblock++;
extlen--;