[v2,09/10] powerpc: Mark archrandom.h functions __must_check
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Message ID 20191106141308.30535-10-rth@twiddle.net
State New
Headers show
Series
  • Improvements for random.h/archrandom.h
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Commit Message

Richard Henderson Nov. 6, 2019, 2:13 p.m. UTC
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>
---
 arch/powerpc/include/asm/archrandom.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Patch
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diff --git a/arch/powerpc/include/asm/archrandom.h b/arch/powerpc/include/asm/archrandom.h
index 7766812e2355..60b8ad798743 100644
--- 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;