KVM: MMU: Fix build warnings in walk_addr_generic()
authorBorislav Petkov <bp@alien8.de>
Mon, 30 May 2011 20:11:17 +0000 (22:11 +0200)
committerAvi Kivity <avi@redhat.com>
Sun, 19 Jun 2011 16:23:13 +0000 (19:23 +0300)
On 3.0-rc1 I get

In file included from arch/x86/kvm/mmu.c:2856:
arch/x86/kvm/paging_tmpl.h: In function ‘paging32_walk_addr_generic’:
arch/x86/kvm/paging_tmpl.h:124: warning: ‘ptep_user’ may be used uninitialized in this function
In file included from arch/x86/kvm/mmu.c:2852:
arch/x86/kvm/paging_tmpl.h: In function ‘paging64_walk_addr_generic’:
arch/x86/kvm/paging_tmpl.h:124: warning: ‘ptep_user’ may be used uninitialized in this function

caused by 6e2ca7d1802bf8ed9908435e34daa116662e7790. According to Takuya
Yoshikawa, ptep_user won't be used uninitialized so shut up gcc.

Cc: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Link: http://lkml.kernel.org/r/20110530094604.GC21833@liondog.tnic
Signed-off-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
arch/x86/kvm/paging_tmpl.h

index 6c4dc010c4cbfdc2dd49f1e82696022373e817fd..9d03ad4dd5ec95366b1e5b22ccf76c8a737a7155 100644 (file)
@@ -121,7 +121,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
                                    gva_t addr, u32 access)
 {
        pt_element_t pte;
-       pt_element_t __user *ptep_user;
+       pt_element_t __user *uninitialized_var(ptep_user);
        gfn_t table_gfn;
        unsigned index, pt_access, uninitialized_var(pte_access);
        gpa_t pte_gpa;