linux-kernel - [PATCH] iommu/arm-smmu-v3: Constify arm_smmu_mmu_notifier

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20211204223301.100649-1-rikard.falkeborn@gmail.com>
Date:   Sat,  4 Dec 2021 23:33:01 +0100
From:   Rikard Falkeborn <rikard.falkeborn@...il.com>
To:     Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>
Cc:     Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Eric Auger <eric.auger@...hat.com>,
        linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Rikard Falkeborn <rikard.falkeborn@...il.com>
Subject: [PATCH] iommu/arm-smmu-v3: Constify arm_smmu_mmu_notifier_ops

The only usage of arm_smmu_mmu_notifier_ops is to assign its address to
the ops field in the mmu_notifier struct, which is a pointer to const
struct mmu_notifier_ops. Make it const to allow the compiler to put it
in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@...il.com>
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
index ee66d1f4cb81..a737ba5f727e 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
@@ -220,7 +220,7 @@ static void arm_smmu_mmu_notifier_free(struct mmu_notifier *mn)
 	kfree(mn_to_smmu(mn));
 }
 
-static struct mmu_notifier_ops arm_smmu_mmu_notifier_ops = {
+static const struct mmu_notifier_ops arm_smmu_mmu_notifier_ops = {
 	.invalidate_range	= arm_smmu_mm_invalidate_range,
 	.release		= arm_smmu_mm_release,
 	.free_notifier		= arm_smmu_mmu_notifier_free,
-- 
2.34.1