diff options
Diffstat (limited to 'drivers/md/bitmap.c')
| -rw-r--r-- | drivers/md/bitmap.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index b6fa55a3cff8..cc7bbd21813e 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1764,6 +1764,20 @@ void bitmap_free(struct bitmap *bitmap) } EXPORT_SYMBOL(bitmap_free); +void bitmap_wait_behind_writes(struct mddev *mddev) +{ + struct bitmap *bitmap = mddev->bitmap; + + /* wait for behind writes to complete */ + if (bitmap && atomic_read(&bitmap->behind_writes) > 0) { + pr_debug("md:%s: behind writes in progress - waiting to stop.\n", + mdname(mddev)); + /* need to kick something here to make sure I/O goes? */ + wait_event(bitmap->behind_wait, + atomic_read(&bitmap->behind_writes) == 0); + } +} + void bitmap_destroy(struct mddev *mddev) { struct bitmap *bitmap = mddev->bitmap; @@ -1771,6 +1785,8 @@ void bitmap_destroy(struct mddev *mddev) if (!bitmap) /* there was no bitmap */ return; + bitmap_wait_behind_writes(mddev); + mutex_lock(&mddev->bitmap_info.mutex); spin_lock(&mddev->lock); mddev->bitmap = NULL; /* disconnect from the md device */ |