[PATCH] kfence: fix implicit function declaration

Anders Roxell anders.roxell at linaro.org
Fri Dec 4 07:18:04 EST 2020

When building kfence the following error shows up:

In file included from mm/kfence/report.c:13:
arch/arm64/include/asm/kfence.h: In function ‘kfence_protect_page’:
arch/arm64/include/asm/kfence.h:12:2: error: implicit declaration of function ‘set_memory_valid’ [-Werror=implicit-function-declaration]
   12 |  set_memory_valid(addr, 1, !protect);
      |  ^~~~~~~~~~~~~~~~

Use the correct include both
f2b7c491916d ("set_memory: allow querying whether set_direct_map_*() is actually enabled")
and 4c4c75881536 ("arm64, kfence: enable KFENCE for ARM64") went in the
same day via different trees.

Signed-off-by: Anders Roxell <anders.roxell at linaro.org>

I got this build error in todays next-20201204.
Andrew, since both patches are in your -mm tree, I think this can be
folded into 4c4c75881536 ("arm64, kfence: enable KFENCE for ARM64")

 arch/arm64/include/asm/kfence.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/kfence.h b/arch/arm64/include/asm/kfence.h
index 6c0afeeab635..c44bb368a810 100644
--- a/arch/arm64/include/asm/kfence.h
+++ b/arch/arm64/include/asm/kfence.h
@@ -3,7 +3,7 @@
 #ifndef __ASM_KFENCE_H
 #define __ASM_KFENCE_H
-#include <asm/cacheflush.h>
+#include <asm/set_memory.h>
 static inline bool arch_kfence_init_pool(void) { return true; }

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