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block: remove per-queue plugging

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Code has been converted over to the new explicit on-stack plugging,
and delay users have been converted to use the new API for that.
So lets kill off the old plugging along with aops->sync_page().

Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Jens Axboe 2011-03-10 08:52:07 +01:00
parent 73c1010119
commit 7eaceaccab
119 changed files with 151 additions and 1269 deletions
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31
fs/buffer.c
View file

@ -54,23 +54,15 @@ init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private)
}
EXPORT_SYMBOL(init_buffer);
static int sync_buffer(void *word)
static int sleep_on_buffer(void *word)
{
struct block_device *bd;
struct buffer_head *bh
= container_of(word, struct buffer_head, b_state);
smp_mb();
bd = bh->b_bdev;
if (bd)
blk_run_address_space(bd->bd_inode->i_mapping);
io_schedule();
return 0;
}
void __lock_buffer(struct buffer_head *bh)
{
wait_on_bit_lock(&bh->b_state, BH_Lock, sync_buffer,
wait_on_bit_lock(&bh->b_state, BH_Lock, sleep_on_buffer,
TASK_UNINTERRUPTIBLE);
}
EXPORT_SYMBOL(__lock_buffer);
@ -90,7 +82,7 @@ EXPORT_SYMBOL(unlock_buffer);
*/
void __wait_on_buffer(struct buffer_head * bh)
{
wait_on_bit(&bh->b_state, BH_Lock, sync_buffer, TASK_UNINTERRUPTIBLE);
wait_on_bit(&bh->b_state, BH_Lock, sleep_on_buffer, TASK_UNINTERRUPTIBLE);
}
EXPORT_SYMBOL(__wait_on_buffer);
@ -749,7 +741,7 @@ static int fsync_buffers_list(spinlock_t *lock, struct list_head *list)
{
struct buffer_head *bh;
struct list_head tmp;
struct address_space *mapping, *prev_mapping = NULL;
struct address_space *mapping;
int err = 0, err2;
INIT_LIST_HEAD(&tmp);
@ -783,10 +775,6 @@ static int fsync_buffers_list(spinlock_t *lock, struct list_head *list)
* wait_on_buffer() will do that for us
* through sync_buffer().
*/
if (prev_mapping && prev_mapping != mapping)
blk_run_address_space(prev_mapping);
prev_mapping = mapping;
brelse(bh);
spin_lock(lock);
}
@ -3138,17 +3126,6 @@ out:
}
EXPORT_SYMBOL(try_to_free_buffers);
void block_sync_page(struct page *page)
{
struct address_space *mapping;
smp_mb();
mapping = page_mapping(page);
if (mapping)
blk_run_backing_dev(mapping->backing_dev_info, page);
}
EXPORT_SYMBOL(block_sync_page);
/*
* There are no bdflush tunables left. But distributions are
* still running obsolete flush daemons, so we terminate them here.