ARM: 7503/1: mm: only flush both pmd entries for classic MMU
authorWill Deacon <will.deacon@arm.com>
Fri, 24 Aug 2012 14:23:06 +0000 (15:23 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Sat, 25 Aug 2012 08:15:57 +0000 (09:15 +0100)
LPAE does not use two pmd entries for a pte, so the additional tlb
flushing is not required.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/include/asm/tlb.h

index 314d4664eae7d9976a5fe656f74918cb8d15ab8b..99a19512ee26e2e5d99135d21f10d8b99e606226 100644 (file)
@@ -199,6 +199,9 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
 {
        pgtable_page_dtor(pte);
 
+#ifdef CONFIG_ARM_LPAE
+       tlb_add_flush(tlb, addr);
+#else
        /*
         * With the classic ARM MMU, a pte page has two corresponding pmd
         * entries, each covering 1MB.
@@ -206,6 +209,7 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
        addr &= PMD_MASK;
        tlb_add_flush(tlb, addr + SZ_1M - PAGE_SIZE);
        tlb_add_flush(tlb, addr + SZ_1M);
+#endif
 
        tlb_remove_page(tlb, pte);
 }