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authorJens Axboe <axboe@suse.de>2006-01-09 11:15:33 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2006-01-30 22:13:17 -0800
commitf5fa864237572059d87f3b8b017c570c39ea5dd6 (patch)
treeae646892105b0d80d73f6bfad3debdda833f78ca
parent6f416659e93354ad74b24dc49b0b15071b848c92 (diff)
downloadlinux-linaro-stable-f5fa864237572059d87f3b8b017c570c39ea5dd6.tar.gz
[PATCH] Kill blk_attempt_remerge()
[BLOCK] Kill blk_attempt_remerge() It's a broken interface, it's done way too late. And apparently it triggers slab problems in recent kernels as well (most likely after the generic dispatch code was merged). So kill it, ide-cd is the only user of it. Signed-off-by: Jens Axboe <axboe@suse.de> chrisw: backport to 2.6.15 tree Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--block/ll_rw_blk.c24
-rw-r--r--drivers/ide/ide-cd.c10
-rw-r--r--include/linux/blkdev.h1
3 files changed, 0 insertions, 35 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 99c9ca6d5992..bde9c4bfe542 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -2609,30 +2609,6 @@ static inline int attempt_front_merge(request_queue_t *q, struct request *rq)
return 0;
}
-/**
- * blk_attempt_remerge - attempt to remerge active head with next request
- * @q: The &request_queue_t belonging to the device
- * @rq: The head request (usually)
- *
- * Description:
- * For head-active devices, the queue can easily be unplugged so quickly
- * that proper merging is not done on the front request. This may hurt
- * performance greatly for some devices. The block layer cannot safely
- * do merging on that first request for these queues, but the driver can
- * call this function and make it happen any way. Only the driver knows
- * when it is safe to do so.
- **/
-void blk_attempt_remerge(request_queue_t *q, struct request *rq)
-{
- unsigned long flags;
-
- spin_lock_irqsave(q->queue_lock, flags);
- attempt_back_merge(q, rq);
- spin_unlock_irqrestore(q->queue_lock, flags);
-}
-
-EXPORT_SYMBOL(blk_attempt_remerge);
-
static int __make_request(request_queue_t *q, struct bio *bio)
{
struct request *req;
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index b4d7a3efb90f..741816a3ecd0 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -1332,8 +1332,6 @@ static ide_startstop_t cdrom_start_read (ide_drive_t *drive, unsigned int block)
if (cdrom_read_from_buffer(drive))
return ide_stopped;
- blk_attempt_remerge(drive->queue, rq);
-
/* Clear the local sector buffer. */
info->nsectors_buffered = 0;
@@ -1874,14 +1872,6 @@ static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
return ide_stopped;
}
- /*
- * for dvd-ram and such media, it's a really big deal to get
- * big writes all the time. so scour the queue and attempt to
- * remerge requests, often the plugging will not have had time
- * to do this properly
- */
- blk_attempt_remerge(drive->queue, rq);
-
info->nsectors_buffered = 0;
/* use dma, if possible. we don't need to check more, since we
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index a33a31e71bbc..4be113974403 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -559,7 +559,6 @@ extern void register_disk(struct gendisk *dev);
extern void generic_make_request(struct bio *bio);
extern void blk_put_request(struct request *);
extern void blk_end_sync_rq(struct request *rq);
-extern void blk_attempt_remerge(request_queue_t *, struct request *);
extern struct request *blk_get_request(request_queue_t *, int, gfp_t);
extern void blk_insert_request(request_queue_t *, struct request *, int, void *);
extern void blk_requeue_request(request_queue_t *, struct request *);