x86: remove set_fixmap() warning

set_fixmap()+clear_fixmap() is safe.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 7a81dd0..b798e7b 100644 (file)
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -173,7 +173,7 @@ set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot)
        new_pte = pfn_pte(phys >> PAGE_SHIFT, prot);
 
        pte = pte_offset_kernel(pmd, vaddr);
-       if (!pte_none(*pte) &&
+       if (!pte_none(*pte) && pte_val(new_pte) &&
            pte_val(*pte) != (pte_val(new_pte) & __supported_pte_mask))
                pte_ERROR(*pte);
        set_pte(pte, new_pte);