powerpc: Mark archrandom.h functions __must_check

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

Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200110145422.49141-10-broonie@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/arch/powerpc/include/asm/archrandom.h b/arch/powerpc/include/asm/archrandom.h
index f0f16b4..9a53e29 100644 (file)
--- a/arch/powerpc/include/asm/archrandom.h
+++ b/arch/powerpc/include/asm/archrandom.h
@@ -6,17 +6,17 @@
 
 #include <asm/machdep.h>
 
-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)
 {
        if (ppc_md.get_random_seed)
                return ppc_md.get_random_seed(v);
@@ -24,7 +24,7 @@ static inline bool 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)
 {
        unsigned long val;
        bool rc;