On Wed, 2017-02-15 at 23:02 +0300, Dmitry V. Levin wrote:
> Stop using NULL to fix the following linux/btrfs.h userspace compilation
> error:
>
> /usr/include/linux/btrfs.h: In function 'btrfs_err_str':
> /usr/include/linux/btrfs.h:740:11: error: 'NULL' undeclared (first use in
> this function)
> return NULL;
>
> Signed-off-by: Dmitry V. Levin <[email protected]>
> ---
> include/uapi/linux/btrfs.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
[]
> @@ -737,7 +737,7 @@ static inline char *btrfs_err_str(enum btrfs_err_code
> err_code)
> return "add/delete/balance/replace/resize operation "\
> "in progress";
> default:
> - return NULL;
> + return 0;
Perhaps to avoid some other warnings this might be better
return (void *)0;
