diff options
| -rw-r--r-- | fs/fs-writeback.c | 17 | ||||
| -rw-r--r-- | include/linux/writeback.h | 1 |
2 files changed, 18 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 49bc1b8e8f1..f6c2155e002 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -1187,6 +1187,23 @@ 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 * diff --git a/include/linux/writeback.h b/include/linux/writeback.h index c18c008f4bb..76e8903cd20 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -70,6 +70,7 @@ struct writeback_control { struct bdi_writeback; int inode_wait(void *); void writeback_inodes_sb(struct super_block *); +int writeback_inodes_sb_if_idle(struct super_block *); void sync_inodes_sb(struct super_block *); void writeback_inodes_wbc(struct writeback_control *wbc); long wb_do_writeback(struct bdi_writeback *wb, int force_wait); |