Although BTRFS_NAME_LEN and XATTR_NAME_MAX is the same value (255), max(BTRFS_NAME_LEN, XATTR_NAME_MAX) should be optimized as const at runtime.
However S390x' arch dependent option "-mwarn-dynamicstack" could still report it as dyanamic stack allocation. Just use BTRFS_NAME_LEN directly to avoid such false alert. Signed-off-by: Qu Wenruo <w...@suse.com> --- fs/btrfs/tree-checker.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c index db835635372f..4c045609909b 100644 --- a/fs/btrfs/tree-checker.c +++ b/fs/btrfs/tree-checker.c @@ -336,7 +336,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info, */ if (key->type == BTRFS_DIR_ITEM_KEY || key->type == BTRFS_XATTR_ITEM_KEY) { - char namebuf[max(BTRFS_NAME_LEN, XATTR_NAME_MAX)]; + char namebuf[BTRFS_NAME_LEN]; read_extent_buffer(leaf, namebuf, (unsigned long)(di + 1), name_len); -- 2.19.0