XFS: Use a signed return type for suffix_kstrtoint()

Author: Markus Elfring <elfring@users.sourceforge.net>

The return type "unsigned long" was used by the suffix_kstrtoint()
function even though it will eventually return a negative error code.
Improve this implementation detail by using the type "int" instead.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring 
Reviewed-by: Eric Sandeen 
Signed-off-by: Dave Chinner 

 fs/xfs/xfs_super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 36bd882..b357757 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -137,7 +137,7 @@ static const match_table_t tokens = {
-STATIC unsigned long
 suffix_kstrtoint(char *s, unsigned int base, int *res)
 	int	last, shift_left_factor = 0, _res;