diff options
Diffstat (limited to 'fs/fs-writeback.c')
| -rw-r--r-- | fs/fs-writeback.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 759666966c6d..2627f0dfcd9c 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -1180,6 +1180,8 @@ void writeback_inodes_sb(struct super_block *sb) .sync_mode = WB_SYNC_NONE, }; + WARN_ON(!rwsem_is_locked(&sb->s_umount)); + args.nr_pages = nr_dirty + nr_unstable + (inodes_stat.nr_inodes - inodes_stat.nr_unused); @@ -1197,7 +1199,9 @@ EXPORT_SYMBOL(writeback_inodes_sb); int writeback_inodes_sb_if_idle(struct super_block *sb) { if (!writeback_in_progress(sb->s_bdi)) { + down_read(&sb->s_umount); writeback_inodes_sb(sb); + up_read(&sb->s_umount); return 1; } else return 0; @@ -1220,6 +1224,8 @@ void sync_inodes_sb(struct super_block *sb) .range_cyclic = 0, }; + WARN_ON(!rwsem_is_locked(&sb->s_umount)); + bdi_queue_work_onstack(&args); wait_sb_inodes(sb); } |