linux-kernel - [PATCH 08/20] iommu/arm-smmu: constify some helpers

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Date:   Mon, 24 Aug 2020 11:37:42 -0700
From:   Rob Clark <robdclark@...il.com>
To:     dri-devel@...ts.freedesktop.org, iommu@...ts.linux-foundation.org
Cc:     Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Will Deacon <will@...nel.org>, freedreno@...ts.freedesktop.org,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Sibi Sankar <sibis@...eaurora.org>,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Robin Murphy <robin.murphy@....com>,
        Joerg Roedel <joro@...tes.org>,
        Rob Clark <robdclark@...omium.org>,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        AngeloGioacchino Del Regno <kholk11@...il.com>,
        Ben Dooks <ben.dooks@...ethink.co.uk>,
        Brian Masney <masneyb@...tation.org>,
        Eric Anholt <eric@...olt.net>, Joerg Roedel <jroedel@...e.de>,
        John Stultz <john.stultz@...aro.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Krishna Reddy <vdumpa@...dia.com>,
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM SMMU DRIVERS),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 08/20] iommu/arm-smmu: constify some helpers

From: Rob Clark <robdclark@...omium.org>

Sprinkle a few `const`s where helpers don't need write access.

Signed-off-by: Rob Clark <robdclark@...omium.org>
---
 drivers/iommu/arm/arm-smmu/arm-smmu.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.h b/drivers/iommu/arm/arm-smmu/arm-smmu.h
index 59ff3fc5c6c8..27c83333fc50 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.h
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.h
@@ -377,7 +377,7 @@ struct arm_smmu_master_cfg {
 	s16				smendx[];
 };
 
-static inline u32 arm_smmu_lpae_tcr(struct io_pgtable_cfg *cfg)
+static inline u32 arm_smmu_lpae_tcr(const struct io_pgtable_cfg *cfg)
 {
 	u32 tcr = FIELD_PREP(ARM_SMMU_TCR_TG0, cfg->arm_lpae_s1_cfg.tcr.tg) |
 		FIELD_PREP(ARM_SMMU_TCR_SH0, cfg->arm_lpae_s1_cfg.tcr.sh) |
@@ -398,13 +398,13 @@ static inline u32 arm_smmu_lpae_tcr(struct io_pgtable_cfg *cfg)
 	return tcr;
 }
 
-static inline u32 arm_smmu_lpae_tcr2(struct io_pgtable_cfg *cfg)
+static inline u32 arm_smmu_lpae_tcr2(const struct io_pgtable_cfg *cfg)
 {
 	return FIELD_PREP(ARM_SMMU_TCR2_PASIZE, cfg->arm_lpae_s1_cfg.tcr.ips) |
 	       FIELD_PREP(ARM_SMMU_TCR2_SEP, ARM_SMMU_TCR2_SEP_UPSTREAM);
 }
 
-static inline u32 arm_smmu_lpae_vtcr(struct io_pgtable_cfg *cfg)
+static inline u32 arm_smmu_lpae_vtcr(const struct io_pgtable_cfg *cfg)
 {
 	return ARM_SMMU_VTCR_RES1 |
 	       FIELD_PREP(ARM_SMMU_VTCR_PS, cfg->arm_lpae_s2_cfg.vtcr.ps) |
-- 
2.26.2