On Thu, 18 Feb 2016, Arnd Bergmann wrote: > 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]>
Acked-by: Nicolas Pitre <[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 > >
