powerpc/mm/radix: Add missing tlb flush
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Tue, 31 May 2016 06:26:31 +0000 (11:56 +0530)
committerMichael Ellerman <mpe@ellerman.id.au>
Wed, 1 Jun 2016 03:47:34 +0000 (13:47 +1000)
This should not have any impact on hash, because hash does tlb
invalidate with every pte update and we don't implement
flush_tlb_* functions for hash. With radix we should make an explicit
call to flush tlb outside pte update.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/mm/pgtable-book3s64.c

index eb44511..6703187 100644 (file)
@@ -33,10 +33,7 @@ int pmdp_set_access_flags(struct vm_area_struct *vma, unsigned long address,
        changed = !pmd_same(*(pmdp), entry);
        if (changed) {
                __ptep_set_access_flags(pmdp_ptep(pmdp), pmd_pte(entry));
-               /*
-                * Since we are not supporting SW TLB systems, we don't
-                * have any thing similar to flush_tlb_page_nohash()
-                */
+               flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE);
        }
        return changed;
 }