linux-kernel - [PATCH] powerpc/prom_init: Add memset as valid external symbol if CONFIG

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Message-Id: <20220619035246.2633538-1-linux@roeck-us.net>
Date:   Sat, 18 Jun 2022 20:52:46 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        ul Mackerras <paulus@...ba.org>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>,
        Daniel Axtens <dja@...ens.net>
Subject: [PATCH] powerpc/prom_init: Add memset as valid external symbol if CONFIG_KASAN=y

If CONFIG_KASAN=y, powerpc:allmodconfig fails to build with the following
error.

Error: External symbol 'memset' referenced from prom_init.c

The problem was introduced with commit 41b7a347bf14 ("powerpc: Book3S
64-bit outline-only KASAN support"). So far, with CONFIG_KASAN=y, only
__memset was accepted as valid external symbol in prom_init_check.sh.
Add memset as well to fix the problem.

Fixes: 41b7a347bf14 ("powerpc: Book3S 64-bit outline-only KASAN support")
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Daniel Axtens <dja@...ens.net>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 arch/powerpc/kernel/prom_init_check.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
index b183ab9c5107..787142b5dd26 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -16,7 +16,7 @@
 grep "^CONFIG_KASAN=y$" .config >/dev/null
 if [ $? -eq 0 ]
 then
-	MEM_FUNCS="__memcpy __memset"
+	MEM_FUNCS="__memcpy __memset memset"
 else
 	MEM_FUNCS="memcpy memset"
 fi
-- 
2.35.1