x86/gdt: Get rid of the get_*_gdt_*_vaddr() helpers

There's a single caller that is only there because it's passing a
pointer into a function (vmcs_writel()) that takes an unsigned long.
Let's just cast it in place rather than having a bunch of trivial
helpers.

Signed-off-by: Andy Lutomirski <[e-mail]>
Cc: Boris Ostrovsky <[e-mail]>
Cc: Borislav Petkov <[e-mail]>
Cc: Brian Gerst <[e-mail]>
Cc: Denys Vlasenko <[e-mail]>
Cc: H. Peter Anvin <[e-mail]>
Cc: Josh Poimboeuf <[e-mail]>
Cc: Juergen Gross <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Thomas Garnier <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Ingo Molnar <[e-mail]>

arch/x86/include/asm/desc.h

···
 	return per_cpu(gdt_page, cpu).gdt;
 }
 
-static inline unsigned long get_cpu_gdt_rw_vaddr(unsigned int cpu)
-{
-	return (unsigned long)get_cpu_gdt_rw(cpu);
-}
-
 /* Provide the current original GDT */
 static inline struct desc_struct *get_current_gdt_rw(void)
 {
 	return this_cpu_ptr(&gdt_page)->gdt;
-}
-
-static inline unsigned long get_current_gdt_rw_vaddr(void)
-{
-	return (unsigned long)get_current_gdt_rw();
 }
 
 /* Get the fixmap index for a specific processor */
···
 	return (struct desc_struct *)__fix_to_virt(idx);
 }
 
-static inline unsigned long get_cpu_gdt_ro_vaddr(int cpu)
-{
-	return (unsigned long)get_cpu_gdt_ro(cpu);
-}
-
 /* Provide the current read-only GDT */
 static inline struct desc_struct *get_current_gdt_ro(void)
 {
 	return get_cpu_gdt_ro(smp_processor_id());
-}
-
-static inline unsigned long get_current_gdt_ro_vaddr(void)
-{
-	return (unsigned long)get_current_gdt_ro();
 }
 
 /* Provide the physical address of the GDT page. */

arch/x86/kvm/vmx.c

···
 	}
 
 	if (!already_loaded) {
-		unsigned long gdt = get_current_gdt_ro_vaddr();
+		void *gdt = get_current_gdt_ro();
 		unsigned long sysenter_esp;
 
 		kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
···
 		 */
 		vmcs_writel(HOST_TR_BASE,
 			    (unsigned long)this_cpu_ptr(&cpu_tss));
-		vmcs_writel(HOST_GDTR_BASE, gdt);   /* 22.2.4 */
+		vmcs_writel(HOST_GDTR_BASE, (unsigned long)gdt);   /* 22.2.4 */
 
 		/*
 		 * VM exits change the host TR limit to 0x67 after a VM