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 <luto@kernel.org>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Garnier <thgarnie@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/46108fb35e1699252b1b6a85039303ff562c9836.1490218061.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/include/asm/desc.h

@@ -53,22 +53,12 @@ static inline struct desc_struct *get_cpu_gdt_rw(unsigned int cpu)
 	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 */
 static inline unsigned int get_cpu_gdt_ro_index(int cpu)
 {
@@ -82,22 +72,12 @@ static inline struct desc_struct *get_cpu_gdt_ro(int cpu)
 	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. */
 static inline phys_addr_t get_cpu_gdt_paddr(unsigned int cpu)
 {

arch/x86/kvm/vmx.c

@@ -2264,7 +2264,7 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 	}
 
 	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);
@@ -2275,7 +2275,7 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 		 */
 		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