x86: use descriptor's functions instead of inline assembly

This patch provides a new set of functions for managing the descriptor
tables that can be used instead of putting the raw assembly in .c files.

Remodeling of store_tr() suggested by Frederik Deweerdt.

[ tglx: arch/x86 adaptation ]

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 6 insertions, 5 deletions

diff --git a/arch/x86/kernel/suspend_64.c b/arch/x86/kernel/suspend_64.c
index f8fafe527ff1..622bb0268284 100644
--- a/arch/x86/kernel/suspend_64.c
+++ b/arch/x86/kernel/suspend_64.c
@@ -32,9 +32,9 @@ void __save_processor_state(struct saved_context *ctxt)
         /*
          * descriptor tables
          */
-        asm volatile ("sgdt %0" : "=m" (ctxt->gdt_limit));
-        asm volatile ("sidt %0" : "=m" (ctxt->idt_limit));
-        asm volatile ("str %0"  : "=m" (ctxt->tr));
+        store_gdt((struct desc_ptr *)&ctxt->gdt_limit);
+        store_idt((struct desc_ptr *)&ctxt->idt_limit);
+        store_tr(ctxt->tr);
 
         /* XMM0..XMM15 should be handled by kernel_fpu_begin(). */
         /*
@@ -91,8 +91,9 @@ void __restore_processor_state(struct saved_context *ctxt)
          * now restore the descriptor tables to their proper values
          * ltr is done i fix_processor_context().
          */
-        asm volatile ("lgdt %0" :: "m" (ctxt->gdt_limit));
-        asm volatile ("lidt %0" :: "m" (ctxt->idt_limit));
+        load_gdt((const struct desc_ptr *)&ctxt->gdt_limit);
+        load_idt((const struct desc_ptr *)&ctxt->idt_limit);
+
 
         /*
          * segment registers