linux-kernel - Re: [PATCH] net: mdio: fix -Wvoid-pointer-to-enum-cast warning

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Date:   Fri, 18 Aug 2023 03:10:22 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Justin Stitt <justinstitt@...gle.com>
Cc:     iyappan@...amperecomputing.com, keyur@...amperecomputing.com,
        quan@...amperecomputing.com, andrew@...n.ch, hkallweit1@...il.com,
        linux@...linux.org.uk, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, nathan@...nel.org,
        ndesaulniers@...gle.com, trix@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, llvm@...ts.linux.dev
Subject: Re: [PATCH] net: mdio: fix -Wvoid-pointer-to-enum-cast warning

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@...nel.org>:

On Tue, 15 Aug 2023 20:35:59 +0000 you wrote:
> When building with clang 18 I see the following warning:
> |       drivers/net/mdio/mdio-xgene.c:338:13: warning: cast to smaller integer
> |               type 'enum xgene_mdio_id' from 'const void *' [-Wvoid-pointer-to-enum-cast]
> |         338 |                 mdio_id = (enum xgene_mdio_id)of_id->data;
> 
> This is due to the fact that `of_id->data` is a void* while `enum
> xgene_mdio_id` has the size of an int. This leads to truncation and
> possible data loss.
> 
> [...]

Here is the summary with links:
  - net: mdio: fix -Wvoid-pointer-to-enum-cast warning
    https://git.kernel.org/netdev/net-next/c/f3add6dec36d

You are awesome, thank you!
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