We found the following warning when build kernel with W=1: fs/fs_parser.c:192:5: warning: no previous prototype for ‘fs_param_bad_value’ [-Wmissing-prototypes] int fs_param_bad_value(struct p_log *log, struct fs_parameter *param) ^ CC drivers/usb/gadget/udc/snps_udc_core.o And no header file define a prototype for this function, so we should mark it as static. Signed-off-by: Luo Jiaxing <luojiaxing@xxxxxxxxxx> --- fs/fs_parser.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/fs_parser.c b/fs/fs_parser.c index ab53e42..68b0148 100644 --- a/fs/fs_parser.c +++ b/fs/fs_parser.c @@ -189,7 +189,7 @@ int fs_lookup_param(struct fs_context *fc, } EXPORT_SYMBOL(fs_lookup_param); -int fs_param_bad_value(struct p_log *log, struct fs_parameter *param) +static int fs_param_bad_value(struct p_log *log, struct fs_parameter *param) { return inval_plog(log, "Bad value for '%s'", param->key); } -- 2.7.4