linux-kernel - Re: [PATCH 08/19] iommu/arm-smmu: constify some helpers

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Date:   Mon, 31 Aug 2020 23:56:03 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Rob Clark <robdclark@...il.com>
Cc:     dri-devel@...ts.freedesktop.org, iommu@...ts.linux-foundation.org,
        linux-arm-msm@...r.kernel.org,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Will Deacon <will@...nel.org>, freedreno@...ts.freedesktop.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>,
        linux-arm-kernel@...ts.infradead.org,
        Rob Clark <robdclark@...omium.org>,
        Jordan Crouse <jcrouse@...eaurora.org>,
        Pritesh Raithatha <praithatha@...dia.com>,
        Krishna Reddy <vdumpa@...dia.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 08/19] iommu/arm-smmu: constify some helpers

On Thu 13 Aug 21:41 CDT 2020, Rob Clark wrote:

> From: Rob Clark <robdclark@...omium.org>
> 
> Sprinkle a few `const`s where helpers don't need write access.
> 

Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>

> 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
>