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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au,
	Scott Wood <scottwood@freescale.com>,
	Denis Kirjanov <kda@linux-powerpc.org>
Cc: linuxppc-dev@lists.ozlabs.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [PATCH V6 35/35] powerpc/mm: Don't open code pgtable_t size
Date: Tue,  1 Dec 2015 09:07:00 +0530	[thread overview]
Message-ID: <1448941020-15168-36-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1448941020-15168-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>

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>
---
 arch/powerpc/mm/hugepage-hash64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/hugepage-hash64.c b/arch/powerpc/mm/hugepage-hash64.c
index 1f666de0110a..baf1301ded0c 100644
--- a/arch/powerpc/mm/hugepage-hash64.c
+++ b/arch/powerpc/mm/hugepage-hash64.c
@@ -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);
-- 
2.5.0

      parent reply	other threads:[~2015-12-01  3:37 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-01  3:36 [PATCH V6 00/35] powerpc/mm: Update page table format for book3s 64 Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 01/35] powerpc/mm: move pte headers to book3s directory Aneesh Kumar K.V
2015-12-14 10:46   ` [V6,01/35] " Michael Ellerman
2016-02-18  2:52   ` [PATCH V6 01/35] " Balbir Singh
2015-12-01  3:36 ` [PATCH V6 02/35] powerpc/mm: move pte headers to book3s directory (part 2) Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 03/35] powerpc/mm: make a separate copy for book3s Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 04/35] powerpc/mm: make a separate copy for book3s (part 2) Aneesh Kumar K.V
2016-02-18  2:54   ` Balbir Singh
2015-12-01  3:36 ` [PATCH V6 05/35] powerpc/mm: Move hash specific pte width and other defines to book3s Aneesh Kumar K.V
2016-02-18  4:45   ` Balbir Singh
2015-12-01  3:36 ` [PATCH V6 06/35] powerpc/mm: Delete booke bits from book3s Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 07/35] powerpc/mm: Don't have generic headers introduce functions touching pte bits Aneesh Kumar K.V
2016-02-18  4:58   ` Balbir Singh
2015-12-01  3:36 ` [PATCH V6 08/35] powerpc/mm: Drop pte-common.h from BOOK3S 64 Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 09/35] powerpc/mm: Don't use pte_val as lvalue Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 10/35] powerpc/mm: Don't use pmd_val, pud_val and pgd_val " Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 11/35] powerpc/mm: Move hash64 PTE bits from book3s/64/pgtable.h to hash.h Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 12/35] powerpc/mm: Move PTE bits from generic functions to hash64 functions Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 13/35] powerpc/booke: Move nohash headers (part 1) Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 14/35] powerpc/booke: Move nohash headers (part 2) Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 15/35] powerpc/booke: Move nohash headers (part 3) Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 16/35] powerpc/booke: Move nohash headers (part 4) Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 17/35] powerpc/booke: Move nohash headers (part 5) Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 18/35] powerpc/mm: Convert 4k hash insert to C Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 19/35] powerpc/mm: Remove the dependency on pte bit position in asm code Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 20/35] powerpc/mm: Don't track subpage valid bit in pte_t Aneesh Kumar K.V
2015-12-03  7:13   ` Anshuman Khandual
2015-12-03 18:57     ` Aneesh Kumar K.V
2016-02-18  1:11   ` Paul Mackerras
2016-02-18  1:49     ` Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 21/35] powerpc/mm: Remove pte_val usage for the second half of pgtable_t Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 22/35] powerpc/mm: Increase the width of #define Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 23/35] powerpc/mm: Convert __hash_page_64K to C Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 24/35] powerpc/mm: Convert 4k insert from asm " Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 25/35] powerpc/mm: Add helper for converting pte bit to hpte bits Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 26/35] powerpc/mm: Move WIMG update to helper Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 27/35] powerpc/mm: Move hugetlb related headers Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 28/35] powerpc/mm: Move THP headers around Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 29/35] powerpc/mm: Add a _PAGE_PTE bit Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 30/35] powerpc/mm: Don't hardcode page table size Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 31/35] powerpc/mm: Don't hardcode the hash pte slot shift Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 32/35] powerpc/nohash: Update 64K nohash config to have 32 pte fragement Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 33/35] powerpc/nohash: we don't use real_pte_t for nohash Aneesh Kumar K.V
2015-12-01  3:36 ` [PATCH V6 34/35] powerpc/mm: Use H_READ with H_READ_4 Aneesh Kumar K.V
2015-12-01  3:37 ` Aneesh Kumar K.V [this message]

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