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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-01-25 14:52:48 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-01-25 14:52:48 +0000 |
| commit | f1487fcbe47cd2bc0c71e8598bf9eb6a82dec544 (patch) | |
| tree | 4c7abed6047538c13dd024a8ecffd15f31b4609a /fs/fs-writeback.c | |
| parent | 84549d239ab9bb2e3a85c6efcf0e6478a38b4260 (diff) | |
| parent | 40aa7030e5213a43e9e0554fd7f95534ea310bf3 (diff) | |
Merge branch 'for-2.6.33' into for-2.6.34
Diffstat (limited to 'fs/fs-writeback.c')
| -rw-r--r-- | fs/fs-writeback.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 49bc1b8e8f19..1a7c42c64ff4 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -242,6 +242,7 @@ static void bdi_sync_writeback(struct backing_dev_info *bdi, /** * 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: @@ -1187,6 +1188,23 @@ void writeback_inodes_sb(struct super_block *sb) EXPORT_SYMBOL(writeback_inodes_sb); /** + * writeback_inodes_sb_if_idle - start writeback if none underway + * @sb: the superblock + * + * Invoke writeback_inodes_sb if no writeback is currently underway. + * Returns 1 if writeback was started, 0 if not. + */ +int writeback_inodes_sb_if_idle(struct super_block *sb) +{ + if (!writeback_in_progress(sb->s_bdi)) { + writeback_inodes_sb(sb); + return 1; + } else + return 0; +} +EXPORT_SYMBOL(writeback_inodes_sb_if_idle); + +/** * sync_inodes_sb - sync sb inode pages * @sb: the superblock * |