[PATCH 4.19 040/234] linux/random.h: Mark CONFIG_ARCH_RANDOM functions __must_check

[Greg Kroah-Hartman]

From: Richard Henderson <richard.henderson@xxxxxxxxxx>

commit 904caa6413c87aacbf7d0682da617c39ca18cf1a upstream.

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

Reviewed-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
Signed-off-by: Richard Henderson <rth@xxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200110145422.49141-7-broonie@xxxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 include/linux/random.h |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -118,19 +118,19 @@ unsigned long randomize_page(unsigned lo
 #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 false;
 }
-static inline bool arch_get_random_int(unsigned int *v)
+static inline bool __must_check arch_get_random_int(unsigned int *v)
 {
 	return false;
 }
-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 false;
 }
-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 false;
 }