zygo: btrfs: did I make a zero here? How is this working?

diff --git a/fs/btrfs/block-rsv.c b/fs/btrfs/block-rsv.c
index 58e2a0dc9704c389115307cede532a4da2124569..bdaa6ca0ac5c46b397708c728be73d29e8f6984a 100644 (file)
--- a/fs/btrfs/block-rsv.c
+++ b/fs/btrfs/block-rsv.c
@@ -393,7 +393,7 @@ void btrfs_update_global_block_rsv(struct btrfs_fs_info *fs_info)
        spin_lock(&sinfo->lock);
        spin_lock(&block_rsv->lock);
 
-       block_rsv->size = min_t(u64, num_bytes, SZ_512M * 16);
+       block_rsv->size = min_t(u64, num_bytes, SZ_512M * 16ULL);
 
        if (block_rsv->reserved < block_rsv->size) {
                num_bytes = block_rsv->size - block_rsv->reserved;