Stop using extra underscores on asm and volatiles, that is just silly.
Also, make lgdt/lidt/sgdt/sldt explicitly "l".
Index: linux-2.6.13/include/asm-i386/desc.h
===================================================================
--- linux-2.6.13.orig/include/asm-i386/desc.h 2005-08-08 17:10:49.000000000 -0700
+++ linux-2.6.13/include/asm-i386/desc.h 2005-08-08 17:15:46.000000000 -0700
@@ -31,18 +31,18 @@
extern struct Xgt_desc_struct idt_descr, cpu_gdt_descr[NR_CPUS];
-#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8))
-#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8))
+#define load_TR_desc() asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8))
+#define load_LDT_desc() asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8))
-#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr))
-#define load_idt(dtr) __asm__ __volatile("lidt %0"::"m" (*dtr))
-#define load_tr(tr) __asm__ __volatile("ltr %0"::"mr" (tr))
-#define load_ldt(ldt) __asm__ __volatile("lldt %0"::"mr" (ldt))
-
-#define store_gdt(dtr) __asm__ ("sgdt %0":"=m" (*dtr))
-#define store_idt(dtr) __asm__ ("sidt %0":"=m" (*dtr))
-#define store_tr(tr) __asm__ ("str %0":"=mr" (tr))
-#define store_ldt(ldt) __asm__ ("sldt %0":"=mr" (ldt))
+#define load_gdt(dtr) asm volatile("lgdtl %0"::"m" (*dtr))
+#define load_idt(dtr) asm volatile("lidtl %0"::"m" (*dtr))
+#define load_tr(tr) asm volatile("ltr %0"::"mr" (tr))
+#define load_ldt(ldt) asm volatile("lldt %0"::"mr" (ldt))
+
+#define store_gdt(dtr) asm ("sgdtl %0":"=m" (*dtr))
+#define store_idt(dtr) asm ("sidtl %0":"=m" (*dtr))
+#define store_tr(tr) asm ("str %0":"=mr" (tr))
+#define store_ldt(ldt) asm ("sldt %0":"=mr" (ldt))
/*
* This is the ldt that every process will get unless we need
@@ -52,7 +52,7 @@
extern void set_intr_gate(unsigned int irq, void * addr);
#define _set_tssldt_desc(n,addr,limit,type) \
-__asm__ __volatile__ ("movw %w3,0(%2)\n\t" \
+asm volatile ("movw %w3,0(%2)\n\t" \
"movw %w1,2(%2)\n\t" \
"rorl $16,%1\n\t" \
"movb %b1,4(%2)\n\t" \
