Received-SPF: pass (google.com: domain of linux-kernel+bounces-63842-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.48.161 as permitted sender) client-ip=147.75.48.161;
From: Jens Axboe <axboe@kernel.dk>
To: Philipp Reisner <philipp.reisner@linbit.com>, 
 Lars Ellenberg <lars.ellenberg@linbit.com>, 
 =?utf-8?q?Christoph_B=C3=B6hmwalder?= <christoph.boehmwalder@linbit.com>, 
 Arnd Bergmann <arnd@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>, Nathan Chancellor <nathan@kernel.org>, 
 Nick Desaulniers <ndesaulniers@google.com>, 
 Bill Wendling <morbo@google.com>, Justin Stitt <justinstitt@google.com>, 
 "Uladzislau Rezki (Sony)" <urezki@gmail.com>, drbd-dev@lists.linbit.com, 
 linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, 
 llvm@lists.linux.dev
In-Reply-To: <20240213100354.457128-1-arnd@kernel.org>
References: <20240213100354.457128-1-arnd@kernel.org>
Subject: Re: [PATCH] drbd: fix function cast warnings in state machine
Message-Id: <170783975824.2331975.17734171438051214868.b4-ty@kernel.dk>
Date: Tue, 13 Feb 2024 08:55:58 -0700
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit


On Tue, 13 Feb 2024 11:03:01 +0100, Arnd Bergmann wrote:
> There are four state machines in drbd that use a common infrastructure, with
> a cast to an incompatible function type in REMEMBER_STATE_CHANGE that clang-16
> now warns about:
> 
> drivers/block/drbd/drbd_state.c:1632:3: error: cast from 'int (*)(struct sk_buff *, unsigned int, struct drbd_resource_state_change *, enum drbd_notification_type)' to 'typeof (last_func)' (aka 'int (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)') converts to incompatible function type [-Werror,-Wcast-function-type-strict]
>  1632 |                 REMEMBER_STATE_CHANGE(notify_resource_state_change,
>       |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>  1633 |                                       resource_state_change, NOTIFY_CHANGE);
>       |                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/block/drbd/drbd_state.c:1619:17: note: expanded from macro 'REMEMBER_STATE_CHANGE'
>  1619 |            last_func = (typeof(last_func))func; \
>       |                        ^~~~~~~~~~~~~~~~~~~~~~~
> drivers/block/drbd/drbd_state.c:1641:4: error: cast from 'int (*)(struct sk_buff *, unsigned int, struct drbd_connection_state_change *, enum drbd_notification_type)' to 'typeof (last_func)' (aka 'int (*)(struct sk_buff *, unsigned int, void *, enum drbd_notification_type)') converts to incompatible function type [-Werror,-Wcast-function-type-strict]
>  1641 |                         REMEMBER_STATE_CHANGE(notify_connection_state_change,
>       |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>  1642 |                                               connection_state_change, NOTIFY_CHANGE);
>       |                                               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> [...]

Applied, thanks!

[1/1] drbd: fix function cast warnings in state machine
      commit: fe0b1e9a73d60f01fdc391925be74e823af7c91d

Best regards,
-- 
Jens Axboe