When CONFIG_MMU is disabled, the access_ok() and __range_ok() macros always return success, and there is a cast to void to ensure the compiler does not warn about an unused address variable. However, at least one driver has a variable for the size argument as well and does warn about that one:
drivers/vhost/vhost.c: In function 'vq_access_ok': drivers/vhost/vhost.c:633:9: warning: unused variable 's' [-Wunused-variable] This changes the macro to also ignore the size argument explicitly to shut up that warning. Signed-off-by: Arnd Bergmann <[email protected]> --- arch/arm/include/asm/uaccess.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h index 35c9db857ebe..9c74c84a10d2 100644 --- a/arch/arm/include/asm/uaccess.h +++ b/arch/arm/include/asm/uaccess.h @@ -290,7 +290,7 @@ extern int __put_user_8(void *, unsigned long long); #define segment_eq(a, b) (1) #define __addr_ok(addr) ((void)(addr), 1) -#define __range_ok(addr, size) ((void)(addr), 0) +#define __range_ok(addr, size) ((void)(addr), (void)(size), 0) #define get_fs() (KERNEL_DS) static inline void set_fs(mm_segment_t fs) -- 2.7.0
