[tip:x86/boot] x86/KASLR: Use the right memcpy() implementation

[tip-bot for Arnd Bergmann]

Commit-ID:  5b8b9cf76add98e19ff8ceb4247c2920687591a0
Gitweb:     http://git.kernel.org/tip/5b8b9cf76add98e19ff8ceb4247c2920687591a0
Author:     Arnd Bergmann <arnd@xxxxxxxx>
AuthorDate: Tue, 30 May 2017 11:14:17 +0200
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 31 May 2017 07:59:45 +0200

x86/KASLR: Use the right memcpy() implementation

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(), via:

	d52e7d5a952c ("x86/KASLR: Parse all 'memmap=' boot option entries")

Other files in the decompressor already do the same thing.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Acked-by: Baoquan He <bhe@xxxxxxxxxx>
Cc: Dave Jiang <dave.jiang@xxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Garnier <thgarnie@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20170530091446.1000183-1-arnd@xxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 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 e0eba12..fe318b4 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>