[PATCH 1/6] random: Mark CONFIG_ARCH_RANDOM functions __must_check

[Richard Henderson]

We cannot use the pointer output without validating the
success of the random read.

Signed-off-by: Richard Henderson <rth at twiddle.net>
---
Cc: Kees Cook <keescook at chromium.org>
Cc: "H. Peter Anvin" <hpa at zytor.com>
Cc: linux-arch at vger.kernel.org
---
 include/linux/random.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/random.h b/include/linux/random.h
index f189c927fdea..84947b489649 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -167,11 +167,11 @@ static inline void prandom_seed_state(struct rnd_state *state, u64 seed)
 #ifdef CONFIG_ARCH_RANDOM
 # include <asm/archrandom.h>
 #else
-static inline bool arch_get_random_long(unsigned long *v)
+static inline bool __must_check arch_get_random_long(unsigned long *v)
 {
 	return 0;
 }
-static inline bool arch_get_random_int(unsigned int *v)
+static inline bool __must_check arch_get_random_int(unsigned int *v)
 {
 	return 0;
 }
@@ -179,11 +179,11 @@ static inline bool arch_has_random(void)
 {
 	return 0;
 }
-static inline bool arch_get_random_seed_long(unsigned long *v)
+static inline bool __must_check arch_get_random_seed_long(unsigned long *v)
 {
 	return 0;
 }
-static inline bool arch_get_random_seed_int(unsigned int *v)
+static inline bool __must_check arch_get_random_seed_int(unsigned int *v)
 {
 	return 0;
 }
-- 
2.17.1