linux-kernel - Re: [PATCH] drm/amd/display: No need for Null pointer check before kfree

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Date:   Sun, 8 Jan 2023 01:59:28 +0530
From:   Deepak R Varma <drv@...lo.com>
To:     Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     Saurabh Singh Sengar <ssengar@...rosoft.com>,
        Praveen Kumar <kumarpraveen@...ux.microsoft.com>,
        Deepak R Varma <drv@...lo.com>
Subject: Re: [PATCH] drm/amd/display: No need for Null pointer check before
 kfree

On Wed, Dec 28, 2022 at 12:09:51AM +0530, Deepak R Varma wrote:
> kfree() & vfree() internally performs NULL check on the pointer handed
> to it and take no action if it indeed is NULL. Hence there is no need
> for a pre-check of the memory pointer before handing it to
> kfree()/vfree().
>
> Issue reported by ifnullfree.cocci Coccinelle semantic patch script.
>
> Signed-off-by: Deepak R Varma <drv@...lo.com>
> ---

Hello,
Requesting a review and feedback on this patch proposal.

Thank you,
./drv