diff options
Diffstat (limited to 'drivers/md/bitmap.c')
| -rw-r--r-- | drivers/md/bitmap.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 3424b1915fc4..3a5767968ba0 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -2211,11 +2211,13 @@ __ATTR(metadata, S_IRUGO|S_IWUSR, metadata_show, metadata_store); static ssize_t can_clear_show(struct mddev *mddev, char *page) { int len; + spin_lock(&mddev->lock); if (mddev->bitmap) len = sprintf(page, "%s\n", (mddev->bitmap->need_sync ? "false" : "true")); else len = sprintf(page, "\n"); + spin_unlock(&mddev->lock); return len; } @@ -2240,10 +2242,15 @@ __ATTR(can_clear, S_IRUGO|S_IWUSR, can_clear_show, can_clear_store); static ssize_t behind_writes_used_show(struct mddev *mddev, char *page) { + ssize_t ret; + spin_lock(&mddev->lock); if (mddev->bitmap == NULL) - return sprintf(page, "0\n"); - return sprintf(page, "%lu\n", - mddev->bitmap->behind_writes_used); + ret = sprintf(page, "0\n"); + else + ret = sprintf(page, "%lu\n", + mddev->bitmap->behind_writes_used); + spin_unlock(&mddev->lock); + return ret; } static ssize_t |