From c5444198ca210498e8ac0ba121b4cd3537aa12f7 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 8 Jun 2010 18:15:15 +0200 Subject: writeback: simplify and split bdi_start_writeback bdi_start_writeback now never gets a superblock passed, so we can just remove that case. And to further untangle the code and flatten the call stack split it into two trivial helpers for it's two callers. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- fs/fs-writeback.c | 32 ++++++++++++++++++++------------ 1 file changed, 20 insertions(+), 12 deletions(-) (limited to 'fs') diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 4fcca4f..0079bf5 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -200,7 +200,6 @@ static void bdi_queue_work_onstack(struct wb_writeback_args *args) /** * bdi_start_writeback - start writeback * @bdi: the backing device to write from - * @sb: write inodes from this super_block * @nr_pages: the number of pages to write * * Description: @@ -209,25 +208,34 @@ static void bdi_queue_work_onstack(struct wb_writeback_args *args) * completion. Caller need not hold sb s_umount semaphore. * */ -void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb, - long nr_pages) +void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages) { struct wb_writeback_args args = { - .sb = sb, .sync_mode = WB_SYNC_NONE, .nr_pages = nr_pages, .range_cyclic = 1, }; - /* - * We treat @nr_pages=0 as the special case to do background writeback, - * ie. to sync pages until the background dirty threshold is reached. - */ - if (!nr_pages) { - args.nr_pages = LONG_MAX; - args.for_background = 1; - } + bdi_alloc_queue_work(bdi, &args); +} +/** + * bdi_start_background_writeback - start background writeback + * @bdi: the backing device to write from + * + * Description: + * This does WB_SYNC_NONE background writeback. The IO is only + * started when this function returns, we make no guarentees on + * completion. Caller need not hold sb s_umount semaphore. + */ +void bdi_start_background_writeback(struct backing_dev_info *bdi) +{ + struct wb_writeback_args args = { + .sync_mode = WB_SYNC_NONE, + .nr_pages = LONG_MAX, + .for_background = 1, + .range_cyclic = 1, + }; bdi_alloc_queue_work(bdi, &args); } -- cgit v1.1