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-rw-r--r--fs/btrfs/root-tree.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 702dc5441f03..12ceb14a1141 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -39,10 +39,8 @@ static void btrfs_read_root_item(struct extent_buffer *eb, int slot,
need_reset = 1;
}
if (need_reset) {
- memset(&item->generation_v2, 0,
- sizeof(*item) - offsetof(struct btrfs_root_item,
- generation_v2));
-
+ /* Clear all members from generation_v2 onwards. */
+ memset_startat(item, 0, generation_v2);
generate_random_guid(item->uuid);
}
}