From: Dmitry Torokhov <dtor@chromium.org>
To: Joerg Roedel <joro@8bytes.org>, Kukjin Kim <kgene@kernel.org>
Cc: Shaik Ameer Basha <shaik.ameer@samsung.com>,
Cho KyongHo <pullip.cho@samsung.com>,
Colin Cross <ccross@android.com>,
Doug Anderson <dianders@chromium.org>,
iommu@lists.linux-foundation.org,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] iommu: exynos: tell kmemleak to ignore 2nd level page tables
Date: Fri, 8 May 2015 17:05:44 -0700 [thread overview]
Message-ID: <20150509000544.GA29904@dtor-ws> (raw)
From: Colin Cross <ccross@android.com>
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 <ccross@android.com>
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
---
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
WARNING: multiple messages have this Message-ID (diff)
From: dtor@chromium.org (Dmitry Torokhov)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] iommu: exynos: tell kmemleak to ignore 2nd level page tables
Date: Fri, 8 May 2015 17:05:44 -0700 [thread overview]
Message-ID: <20150509000544.GA29904@dtor-ws> (raw)
From: Colin Cross <ccross@android.com>
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 <ccross@android.com>
Signed-off-by: Dmitry Torokhov <dtor@chromium.org>
---
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
next reply other threads:[~2015-05-09 0:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-09 0:05 Dmitry Torokhov [this message]
2015-05-09 0:05 ` [PATCH] iommu: exynos: tell kmemleak to ignore 2nd level page tables Dmitry Torokhov
2015-05-11 16:50 ` Joerg Roedel
2015-05-11 16:50 ` Joerg Roedel
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