x86: Make the GDT_ENTRY() macro in <asm/segment.h> safe for assembly
Make the GDT_ENTRY() macro in <asm/segment.h> safe for use in
assembly code by guarding the ULL suffixes with _AC() macros.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
diff --git a/arch/x86/include/asm/segment.h b/arch/x86/include/asm/segment.h
index 231f1c1..cd84f72 100644
--- a/arch/x86/include/asm/segment.h
+++ b/arch/x86/include/asm/segment.h
@@ -1,14 +1,16 @@
#ifndef _ASM_X86_SEGMENT_H
#define _ASM_X86_SEGMENT_H
+#include <linux/const.h>
+
/* Constructor for a conventional segment GDT (or LDT) entry */
/* This is a macro so it can be used in initializers */
#define GDT_ENTRY(flags, base, limit) \
- ((((base) & 0xff000000ULL) << (56-24)) | \
- (((flags) & 0x0000f0ffULL) << 40) | \
- (((limit) & 0x000f0000ULL) << (48-16)) | \
- (((base) & 0x00ffffffULL) << 16) | \
- (((limit) & 0x0000ffffULL)))
+ ((((base) & _AC(0xff000000,ULL)) << (56-24)) | \
+ (((flags) & _AC(0x0000f0ff,ULL)) << 40) | \
+ (((limit) & _AC(0x000f0000,ULL)) << (48-16)) | \
+ (((base) & _AC(0x00ffffff,ULL)) << 16) | \
+ (((limit) & _AC(0x0000ffff,ULL))))
/* Simple and small GDT entries for booting only */