kvm: i386 fix

arch/x86/kvm/x86.c: In function 'emulator_cmpxchg_emulated':
arch/x86/kvm/x86.c:1746: warning: passing argument 2 of 'vcpu->arch.mmu.gva_to_gpa' makes integer from pointer without a cast
arch/x86/kvm/x86.c:1746: warning: 'addr' is used uninitialized in this function

Is true.  Local variable `addr' shadows incoming arg `addr'.  Avi is on
vacation for a while, so...

Cc: Avi Kivity <avi@qumranet.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/x86/kvm/x86.c

@@ -1739,7 +1739,7 @@ static int emulator_cmpxchg_emulated(unsigned long addr,
 	if (bytes == 8) {
 		gpa_t gpa;
 		struct page *page;
-		char *addr;
+		char *kaddr;
 		u64 val;
 
 		down_read(&current->mm->mmap_sem);
@@ -1754,9 +1754,9 @@ static int emulator_cmpxchg_emulated(unsigned long addr,
 
 		val = *(u64 *)new;
 		page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
-		addr = kmap_atomic(page, KM_USER0);
-		set_64bit((u64 *)(addr + offset_in_page(gpa)), val);
-		kunmap_atomic(addr, KM_USER0);
+		kaddr = kmap_atomic(page, KM_USER0);
+		set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val);
+		kunmap_atomic(kaddr, KM_USER0);
 		kvm_release_page_dirty(page);
 	emul_write:
 		up_read(&current->mm->mmap_sem);