Commit 4dcbd88e authored Dec 01, 2015 by Aneesh Kumar K.V Committed by Michael Ellerman Dec 14, 2015

powerpc/mm: Don't open code pgtable_t size



The slot information of base page size hash pte is stored in the
pgtable_t w.r.t transparent hugepage. We need to make sure we don't
index beyond pgtable_t size.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent 4ad90c86

arch/powerpc/mm/hugepage-hash64.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -71,7 +71,7 @@ int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid,
		*/
		shift = mmu_psize_defs[psize].shift;
		index = (ea & ~HPAGE_PMD_MASK) >> shift;
		BUG_ON(index >= 4096);
		BUG_ON(index >= PTE_FRAG_SIZE);

		vpn = hpt_vpn(ea, vsid, ssize);
		hpte_slot_array = get_hpte_slot_array(pmdp);