linux-kernel - [PATCH] x86/KASLR: use the right memcpy

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Date:   Tue, 30 May 2017 11:14:17 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Ingo Molnar <mingo@...hat.com>, x86@...nel.org
Cc:     Arnd Bergmann <arnd@...db.de>, "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Kees Cook <keescook@...omium.org>, Baoquan He <bhe@...hat.com>,
        Thomas Garnier <thgarnie@...gle.com>,
        Dave Jiang <dave.jiang@...el.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] x86/KASLR: use the right memcpy

The decompressor has its own implementation of the string functions,
but has to include the right header to get those, while implicitly
including linux/string.h may result in a link error:

arch/x86/boot/compressed/kaslr.o: In function `choose_random_location':
kaslr.c:(.text+0xf51): undefined reference to `_mmx_memcpy'

This has appeared now as kaslr started using memcpy. Other files in the
decompressor already do the same thing.

Fixes: d52e7d5a952c ("x86/KASLR: Parse all 'memmap=' boot option entries")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/x86/boot/compressed/kaslr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index e0eba12bffe7..fe318b44f7b8 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -30,6 +30,7 @@
 
 #include "misc.h"
 #include "error.h"
+#include "../string.h"
 
 #include <generated/compile.h>
 #include <linux/module.h>
-- 
2.9.0