x86: unify load_segment macro

This patch unifies the load_segment() macro, making them equal in both
x86_64 and i386 architectures. The common version goes to system.h,
and the old are deleted.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 21 insertions, 0 deletions

diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h
index d0803f8c70c4..3740bada097c 100644
--- a/include/asm-x86/system.h
+++ b/include/asm-x86/system.h
@@ -39,6 +39,27 @@ __asm__ __volatile__ ("movw %%dx,%1\n\t" \
 #define set_limit(ldt, limit) _set_limit(((char *)&(ldt)) , ((limit)-1))
 
 /*
+ * Load a segment. Fall back on loading the zero
+ * segment if something goes wrong..
+ */
+#define loadsegment(seg, value)                 \
+        asm volatile("\n"                       \
+                "1:\t"                          \
+                "movl %k0,%%" #seg "\n"         \
+                "2:\n"                          \
+                ".section .fixup,\"ax\"\n"      \
+                "3:\t"                          \
+                "movl %k1, %%" #seg "\n\t"      \
+                "jmp 2b\n"                      \
+                ".previous\n"                   \
+                ".section __ex_table,\"a\"\n\t" \
+                _ASM_ALIGN "\n\t"               \
+                _ASM_PTR " 1b,3b\n"             \
+                ".previous"                     \
+                : :"r" (value), "r" (0))
+
+
+/*
  * Save a segment register away
  */
 #define savesegment(seg, value) \