diff options
author | Ian Wisbon <ian.wisbon@timesys.com> | 2011-02-14 16:41:03 -0500 |
---|---|---|
committer | Ian Wisbon <ian.wisbon@timesys.com> | 2011-02-14 16:44:16 -0500 |
commit | f3e8554f6e7441c1159994f93cf7bad631a122c1 (patch) | |
tree | 80f5d89cca49330e137688c72fb10c9f42dc5663 /drivers/md/bitmap.c | |
parent | 14a4057959f8ee0a2249eb2abd64fd6b1f571d98 (diff) |
Digi Release Code from del-5.6/main
Diffstat (limited to 'drivers/md/bitmap.c')
-rw-r--r-- | drivers/md/bitmap.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 3319c2fec28e..0aee97a30b80 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1077,23 +1077,31 @@ static bitmap_counter_t *bitmap_get_counter(struct bitmap *bitmap, * out to disk */ -void bitmap_daemon_work(struct bitmap *bitmap) +void bitmap_daemon_work(mddev_t *mddev) { + struct bitmap *bitmap; unsigned long j; unsigned long flags; struct page *page = NULL, *lastpage = NULL; int blocks; void *paddr; - if (bitmap == NULL) + /* Use a mutex to guard daemon_work against + * bitmap_destroy. + */ + mutex_lock(&mddev->bitmap_mutex); + bitmap = mddev->bitmap; + if (bitmap == NULL) { + mutex_unlock(&mddev->bitmap_mutex); return; + } if (time_before(jiffies, bitmap->daemon_lastrun + bitmap->daemon_sleep*HZ)) goto done; bitmap->daemon_lastrun = jiffies; if (bitmap->allclean) { bitmap->mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT; - return; + goto done; } bitmap->allclean = 1; @@ -1202,6 +1210,7 @@ void bitmap_daemon_work(struct bitmap *bitmap) done: if (bitmap->allclean == 0) bitmap->mddev->thread->timeout = bitmap->daemon_sleep * HZ; + mutex_unlock(&mddev->bitmap_mutex); } static bitmap_counter_t *bitmap_get_counter(struct bitmap *bitmap, @@ -1538,9 +1547,9 @@ void bitmap_flush(mddev_t *mddev) */ sleep = bitmap->daemon_sleep; bitmap->daemon_sleep = 0; - bitmap_daemon_work(bitmap); - bitmap_daemon_work(bitmap); - bitmap_daemon_work(bitmap); + bitmap_daemon_work(mddev); + bitmap_daemon_work(mddev); + bitmap_daemon_work(mddev); bitmap->daemon_sleep = sleep; bitmap_update_sb(bitmap); } @@ -1571,6 +1580,7 @@ static void bitmap_free(struct bitmap *bitmap) kfree(bp); kfree(bitmap); } + void bitmap_destroy(mddev_t *mddev) { struct bitmap *bitmap = mddev->bitmap; @@ -1578,7 +1588,9 @@ void bitmap_destroy(mddev_t *mddev) if (!bitmap) /* there was no bitmap */ return; + mutex_lock(&mddev->bitmap_mutex); mddev->bitmap = NULL; /* disconnect from the md device */ + mutex_unlock(&mddev->bitmap_mutex); if (mddev->thread) mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT; |