linux-kernel - [PATCH 3.16 007/305] x86/boot: eboot.c: Include string function declarations

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Message-ID: <lsq.1549201508.841969222@decadent.org.uk>
Date:   Sun, 03 Feb 2019 14:45:08 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "kbuild test robot" <lkp@...el.com>
Subject: [PATCH 3.16 007/305] x86/boot: eboot.c: Include string function
 declarations

3.16.63-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Ben Hutchings <ben@...adent.org.uk>

The earliest boot code has its own string functions, since it can't
use those included in the main kernel image.  Under some compiler
versions eboot.c fails to include a suitable declaration, resulting in
the warning:

   In file included from arch/x86/boot/compressed/eboot.c:287:0:
   arch/x86/boot/compressed/../../../../drivers/firmware/efi/efi-stub-helper.c: In function 'efi_relocate_kernel':
>> arch/x86/boot/compressed/../../../../drivers/firmware/efi/efi-stub-helper.c:566:2: warning: implicit declaration of function 'memcpy'; did you mean 'memchr'? [-Wimplicit-function-declaration]
     memcpy((void *)new_addr, (void *)cur_image_addr, image_size);
     ^~~~~~
     memchr

Include "../string.h" which provides the correct declarations.  This
was done upstream as part of commit 393f203f5fd5 "x86_64: kasan: add
interceptors for memset/memmove/memcpy functions".

Reported-by: kbuild test robot <lkp@...el.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -13,8 +13,7 @@
 #include <asm/setup.h>
 #include <asm/desc.h>
 
-#undef memcpy			/* Use memcpy from misc.c */
-
+#include "../string.h"
 #include "eboot.h"
 
 static efi_system_table_t *sys_table;