asm/ptrace.h needs linux/compiler.h

From: Jean Delvare <khali@linux-fr.org>
On x86_64, <asm/ptrace.h> uses __user but doesn't include
<linux/compiler.h>. This could lead to build failures. Fix it.

Or maybe we can simply omit the __user in the declaration? I don't
know.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andi Kleen <ak@suse.de>

---
 include/asm-x86_64/ptrace.h |    1 +
 1 file changed, 1 insertion(+)

Index: linux/include/asm-x86_64/ptrace.h
===================================================================
--- linux.orig/include/asm-x86_64/ptrace.h
+++ linux/include/asm-x86_64/ptrace.h
@@ -1,6 +1,7 @@
 #ifndef _X86_64_PTRACE_H
 #define _X86_64_PTRACE_H
 
+#include <linux/compiler.h>	/* For __user */
 #include <asm/ptrace-abi.h>
 
 #ifndef __ASSEMBLY__