linux-kernel - Re: [PATCH] drm/amdkfd: Use max() instead of doing it manually

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Message-ID: <YanmbhwDrdpu+Zup@intel.com>
Date:   Fri, 3 Dec 2021 11:42:06 +0200
From:   Ville Syrjälä <ville.syrjala@...ux.intel.com>
To:     Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
Cc:     Felix.Kuehling@....com, airlied@...ux.ie, Xinhui.Pan@....com,
        linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        linaro-mm-sig@...ts.linaro.org, dri-devel@...ts.freedesktop.org,
        alexander.deucher@....com, christian.koenig@....com,
        linux-media@...r.kernel.org
Subject: Re: [PATCH] drm/amdkfd: Use max() instead of doing it manually

On Fri, Dec 03, 2021 at 05:31:53PM +0800, Jiapeng Chong wrote:
> Fix following coccicheck warning:
> 
> ./drivers/gpu/drm/amd/amdkfd/kfd_svm.c:2193:16-17: WARNING opportunity
> for max().
> 
> Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
> Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
> ---
>  drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
> index f2db49c..4f7e7b1 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c
> @@ -2190,7 +2190,7 @@ void schedule_deferred_list_work(struct svm_range_list *svms)
>  
>  	start = mni->interval_tree.start;
>  	last = mni->interval_tree.last;
> -	start = (start > range->start ? start : range->start) >> PAGE_SHIFT;
> +	start = max(start, range->start) >> PAGE_SHIFT;
>  	last = (last < (range->end - 1) ? last : range->end - 1) >> PAGE_SHIFT;

There's an open coded min() on the very next line.

>  	pr_debug("[0x%lx 0x%lx] range[0x%lx 0x%lx] notifier[0x%lx 0x%lx] %d\n",
>  		 start, last, range->start >> PAGE_SHIFT,
> -- 
> 1.8.3.1

-- 
Ville Syrjälä
Intel