linux-kernel - ./arch/x86/include/asm/desc.h:122:2: error: implicit declaration of function ‘memcpy’ [-Werror=implicit-function-declaration]

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Date:	Wed, 14 Oct 2015 23:47:58 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Andy Lutomirski <luto@...capital.net>,
	lkml <linux-kernel@...r.kernel.org>
Subject: ./arch/x86/include/asm/desc.h:122:2: error: implicit declaration of function ‘memcpy’ [-Werror=implicit-function-declaration]

Hey,

did the issue in $Subject get fixed somewhere?

I remember reading something about it on lkml ...

In any case, I'm seeing this in my randconfig builds:

In file included from arch/x86/kernel/setup.c:96:0:
./arch/x86/include/asm/desc.h: In function ‘native_write_idt_entry’:
./arch/x86/include/asm/desc.h:122:2: error: implicit declaration of function ‘memcpy’ [-Werror=implicit-function-declaration]
  memcpy(&idt[entry], gate, sizeof(*gate));
  ^
cc1: some warnings being treated as errors
make[2]: *** [arch/x86/kernel/setup.o] Error 1

and CONFIG_KASAN is set in that randconfig (attached).

When I disable it, same config builds fine.

Hmmm...

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.

View attachment "17-51-37-randconfig-x86_64-643.cfg" of type "text/plain" (73302 bytes)