From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: [PATCH] iommu: exynos: tell kmemleak to ignore 2nd level page tables Date: Fri, 8 May 2015 17:05:44 -0700 Message-ID: <20150509000544.GA29904@dtor-ws> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-ie0-f180.google.com ([209.85.223.180]:35652 "EHLO mail-ie0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753033AbbEIAFs (ORCPT ); Fri, 8 May 2015 20:05:48 -0400 Received: by ieczm2 with SMTP id zm2so75215504iec.2 for ; Fri, 08 May 2015 17:05:47 -0700 (PDT) Content-Disposition: inline Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-samsung-soc@vger.kernel.org To: Joerg Roedel , Kukjin Kim Cc: Shaik Ameer Basha , Cho KyongHo , Colin Cross , Doug Anderson , iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org From: Colin Cross The pointers to the 2nd level page tables are converted to 1st level page table entries, which means kmemleak can't find them and assumes they have been leaked. Call kmemleak_ignore on the 2nd level page tables to prevent them from showing up in kmemleak reports. Signed-off-by: Colin Cross Signed-off-by: Dmitry Torokhov --- drivers/iommu/exynos-iommu.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index dc14fec4..16920b2 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -855,6 +855,7 @@ static sysmmu_pte_t *alloc_lv2entry(struct exynos_iommu_domain *priv, return ERR_PTR(-ENOMEM); *sent = mk_lv1ent_page(virt_to_phys(pent)); + kmemleak_ignore(pent); *pgcounter = NUM_LV2ENTRIES; pgtable_flush(pent, pent + NUM_LV2ENTRIES); pgtable_flush(sent, sent + 1); -- 2.2.0.rc0.207.ga3a616c -- Dmitry