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-rw-r--r--arch/i386/mm/pgtable.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/i386/mm/pgtable.c b/arch/i386/mm/pgtable.c
index 33be236..f349eaf 100644
--- a/arch/i386/mm/pgtable.c
+++ b/arch/i386/mm/pgtable.c
@@ -95,8 +95,11 @@ static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
return;
}
pte = pte_offset_kernel(pmd, vaddr);
- /* <pfn,flags> stored as-is, to permit clearing entries */
- set_pte(pte, pfn_pte(pfn, flags));
+ if (pgprot_val(flags))
+ /* <pfn,flags> stored as-is, to permit clearing entries */
+ set_pte(pte, pfn_pte(pfn, flags));
+ else
+ pte_clear(&init_mm, vaddr, pte);
/*
* It's enough to flush this one mapping.
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