[PATCH] btrfs: zstd ensure reclaim timer is properly cleaned up

[Dennis Zhou]

The timer function, zstd_reclaim_timer_fn(), reschedules itself under
certain conditions. Switch to del_timer_sync() to ensure that the timer
function hasn't rescheduled itself.

Signed-off-by: Dennis Zhou <den...@kernel.org>
---
 fs/btrfs/zstd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/zstd.c b/fs/btrfs/zstd.c
index 3e418a3aeb11..62de9a211321 100644
--- a/fs/btrfs/zstd.c
+++ b/fs/btrfs/zstd.c
@@ -195,7 +195,7 @@ static void zstd_cleanup_workspace_manager(void)
        struct workspace *workspace;
        int i;
 
-       del_timer(&wsm.timer);
+       del_timer_sync(&wsm.timer);
 
        for (i = 0; i < ZSTD_BTRFS_MAX_LEVEL; i++) {
                while (!list_empty(&wsm.idle_ws[i])) {
-- 
2.17.1