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Subject: Re: [PATCH net] vsock/virtio: fix "comparison of distinct pointer types
 lacks a cast" warning
From:   patchwork-bot+netdevbpf@kernel.org
Message-Id: <170197322883.20147.5857598481880040072.git-patchwork-notify@kernel.org>
Date:   Thu, 07 Dec 2023 18:20:28 +0000
References: <20231206164143.281107-1-sgarzare@redhat.com>
In-Reply-To: <20231206164143.281107-1-sgarzare@redhat.com>
To:     Stefano Garzarella <sgarzare@redhat.com>
Cc:     netdev@vger.kernel.org, kuba@kernel.org, davem@davemloft.net,
        virtualization@lists.linux.dev, mst@redhat.com,
        avkrasnov@salutedevices.com, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org, stefanha@redhat.com,
        edumazet@google.com, pabeni@redhat.com
Precedence: bulk

Hello:

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

On Wed,  6 Dec 2023 17:41:43 +0100 you wrote:
> After backporting commit 581512a6dc93 ("vsock/virtio: MSG_ZEROCOPY
> flag support") in CentOS Stream 9, CI reported the following error:
> 
>     In file included from ./include/linux/kernel.h:17,
>                      from ./include/linux/list.h:9,
>                      from ./include/linux/preempt.h:11,
>                      from ./include/linux/spinlock.h:56,
>                      from net/vmw_vsock/virtio_transport_common.c:9:
>     net/vmw_vsock/virtio_transport_common.c: In function ‘virtio_transport_can_zcopy‘:
>     ./include/linux/minmax.h:20:35: error: comparison of distinct pointer types lacks a cast [-Werror]
>        20 |         (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
>           |                                   ^~
>     ./include/linux/minmax.h:26:18: note: in expansion of macro ‘__typecheck‘
>        26 |                 (__typecheck(x, y) && __no_side_effects(x, y))
>           |                  ^~~~~~~~~~~
>     ./include/linux/minmax.h:36:31: note: in expansion of macro ‘__safe_cmp‘
>        36 |         __builtin_choose_expr(__safe_cmp(x, y), \
>           |                               ^~~~~~~~~~
>     ./include/linux/minmax.h:45:25: note: in expansion of macro ‘__careful_cmp‘
>        45 | #define min(x, y)       __careful_cmp(x, y, <)
>           |                         ^~~~~~~~~~~~~
>     net/vmw_vsock/virtio_transport_common.c:63:37: note: in expansion of macro ‘min‘
>        63 |                 int pages_to_send = min(pages_in_iov, MAX_SKB_FRAGS);
> 
> [...]

Here is the summary with links:
  - [net] vsock/virtio: fix "comparison of distinct pointer types lacks a cast" warning
    https://git.kernel.org/netdev/net/c/b0a930e8d90c

You are awesome, thank you!
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