linux-kernel - Re: [PATCH] accel/ivpu: avoid build failure with CONFIG

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Message-ID: <ZT9HkiflwVKnZlzk@linux.intel.com>
Date:   Mon, 30 Oct 2023 07:05:06 +0100
From:   Stanislaw Gruszka <stanislaw.gruszka@...ux.intel.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Jacek Lawrynowicz <jacek.lawrynowicz@...ux.intel.com>,
        Oded Gabbay <ogabbay@...nel.org>,
        Jeffrey Hugo <quic_jhugo@...cinc.com>,
        Karol Wachowski <karol.wachowski@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Krystian Pradzynski <krystian.pradzynski@...ux.intel.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] accel/ivpu: avoid build failure with CONFIG_PM=n

On Fri, Oct 27, 2023 at 05:26:23PM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> The usage count of struct dev_pm_info is an implementation detail that
> is only available if CONFIG_PM is enabled, so printing it in a debug message
> causes a build failure in configurations without PM:
> 
> In file included from include/linux/device.h:15,
>                  from include/linux/pci.h:37,
>                  from drivers/accel/ivpu/ivpu_pm.c:8:
> drivers/accel/ivpu/ivpu_pm.c: In function 'ivpu_rpm_get_if_active':
> drivers/accel/ivpu/ivpu_pm.c:254:51: error: 'struct dev_pm_info' has no member named 'usage_count'
>   254 |                  atomic_read(&vdev->drm.dev->power.usage_count));
>       |                                                   ^
> include/linux/dev_printk.h:129:48: note: in definition of macro 'dev_printk'
>   129 |                 _dev_printk(level, dev, fmt, ##__VA_ARGS__);            \
>       |                                                ^~~~~~~~~~~
> drivers/accel/ivpu/ivpu_drv.h:75:17: note: in expansion of macro 'dev_dbg'
>    75 |                 dev_dbg((vdev)->drm.dev, "[%s] " fmt, #type, ##args);          \
>       |                 ^~~~~~~
> drivers/accel/ivpu/ivpu_pm.c:253:9: note: in expansion of macro 'ivpu_dbg'
>   253 |         ivpu_dbg(vdev, RPM, "rpm_get_if_active count %d\n",
>       |         ^~~~~~~~
> 
> The print message does not seem essential, so the easiest workaround is
> to just remove it.
> 
> Fixes: c39dc15191c4 ("accel/ivpu: Read clock rate only if device is up")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Applied to drm-misc-next

Thanks
Stanislaw