btrfs: zstd: assert the timer pointer in callback

Make sure we got the right timer struct for the zstd workspace reclaim
work.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/zstd.c b/fs/btrfs/zstd.c
index 15f8a83165a38b83024dd4e6bd1061f3953d6e6f..5232b56d5892599c0f48f5712fd62363acefe0e6 100644 (file)
--- a/fs/btrfs/zstd.c
+++ b/fs/btrfs/zstd.c
@@ -111,6 +111,8 @@ static void zstd_reclaim_timer_fn(struct timer_list *timer)
        unsigned long reclaim_threshold = jiffies - ZSTD_BTRFS_RECLAIM_JIFFIES;
        struct list_head *pos, *next;
 
+       ASSERT(timer == &wsm.timer);
+
        spin_lock(&wsm.lock);
 
        if (list_empty(&wsm.lru_list)) {