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[PATCH] md: Don't assume that READ==0 and WRITE==1 - use the names explicitly

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Thanks Jens for alerting me to this.

Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: <raziebe@gmail.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown
2006-12-13 00:34:13 -08:00
committed by Linus Torvalds
parent 011e3a9ad4
commit 802ba064c4
4 changed files with 15 additions and 15 deletions
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20
drivers/md/raid5.c
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@ -1827,16 +1827,16 @@ static void handle_stripe5(struct stripe_head *sh)
struct bio *bi;
mdk_rdev_t *rdev;
if (test_and_clear_bit(R5_Wantwrite, &sh->dev[i].flags))
rw = 1;
rw = WRITE;
else if (test_and_clear_bit(R5_Wantread, &sh->dev[i].flags))
rw = 0;
rw = READ;
else
continue;
bi = &sh->dev[i].req;
bi->bi_rw = rw;
if (rw)
if (rw == WRITE)
bi->bi_end_io = raid5_end_write_request;
else
bi->bi_end_io = raid5_end_read_request;
@ -1872,7 +1872,7 @@ static void handle_stripe5(struct stripe_head *sh)
atomic_add(STRIPE_SECTORS, &rdev->corrected_errors);
generic_make_request(bi);
} else {
if (rw == 1)
if (rw == WRITE)
set_bit(STRIPE_DEGRADED, &sh->state);
PRINTK("skip op %ld on disc %d for sector %llu\n",
bi->bi_rw, i, (unsigned long long)sh->sector);
@ -2370,16 +2370,16 @@ static void handle_stripe6(struct stripe_head *sh, struct page *tmp_page)
struct bio *bi;
mdk_rdev_t *rdev;
if (test_and_clear_bit(R5_Wantwrite, &sh->dev[i].flags))
rw = 1;
rw = WRITE;
else if (test_and_clear_bit(R5_Wantread, &sh->dev[i].flags))
rw = 0;
rw = READ;
else
continue;
bi = &sh->dev[i].req;
bi->bi_rw = rw;
if (rw)
if (rw == WRITE)
bi->bi_end_io = raid5_end_write_request;
else
bi->bi_end_io = raid5_end_read_request;
@ -2415,7 +2415,7 @@ static void handle_stripe6(struct stripe_head *sh, struct page *tmp_page)
atomic_add(STRIPE_SECTORS, &rdev->corrected_errors);
generic_make_request(bi);
} else {
if (rw == 1)
if (rw == WRITE)
set_bit(STRIPE_DEGRADED, &sh->state);
PRINTK("skip op %ld on disc %d for sector %llu\n",
bi->bi_rw, i, (unsigned long long)sh->sector);
@ -2567,7 +2567,7 @@ static int raid5_mergeable_bvec(request_queue_t *q, struct bio *bio, struct bio_
unsigned int chunk_sectors = mddev->chunk_size >> 9;
unsigned int bio_sectors = bio->bi_size >> 9;
if (bio_data_dir(bio))
if (bio_data_dir(bio) == WRITE)
return biovec->bv_len; /* always allow writes to be mergeable */
max = (chunk_sectors - ((sector & (chunk_sectors - 1)) + bio_sectors)) << 9;
@ -2751,7 +2751,7 @@ static int make_request(request_queue_t *q, struct bio * bi)
disk_stat_inc(mddev->gendisk, ios[rw]);
disk_stat_add(mddev->gendisk, sectors[rw], bio_sectors(bi));
if (bio_data_dir(bi) == READ &&
if (rw == READ &&
mddev->reshape_position == MaxSector &&
chunk_aligned_read(q,bi))
return 0;