From 54afaae34ee49e98c1c902b444b42832551d090c Mon Sep 17 00:00:00 2001 From: David Sterba Date: Wed, 23 Jun 2021 17:54:54 +0200 Subject: [PATCH] btrfs: zoned: fix types for u64 division in btrfs_reclaim_bgs_work The types in calculation of the used percentage in the reclaiming messages are both u64, though bg->length is either 1GiB (non-zoned) or the zone size in the zoned mode. The upper limit on zone size is 8GiB so this could theoretically overflow in the future, right now the values fit. Fixes: 18bb8bbf13c1 ("btrfs: zoned: automatically reclaim zones") CC: stable@vger.kernel.org # 5.13 Reviewed-by: Johannes Thumshirn Signed-off-by: David Sterba --- fs/btrfs/block-group.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index 38b127b9edfc9..d4c8dc5508893 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -1540,7 +1540,7 @@ void btrfs_reclaim_bgs_work(struct work_struct *work) goto next; btrfs_info(fs_info, "reclaiming chunk %llu with %llu%% used", - bg->start, div_u64(bg->used * 100, bg->length)); + bg->start, div64_u64(bg->used * 100, bg->length)); trace_btrfs_reclaim_block_group(bg); ret = btrfs_relocate_chunk(fs_info, bg->start); if (ret)