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    Subject[PATCH] kvm: Fix build warnings
    Date
    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>
    ---
    arch/x86/kvm/paging_tmpl.h | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
    index 6c4dc01..9d03ad4 100644
    --- a/arch/x86/kvm/paging_tmpl.h
    +++ b/arch/x86/kvm/paging_tmpl.h
    @@ -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;
    --
    1.7.5.rc1.16.g9db1
    --
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