linux-kernel - Re: [PATCH v5 1/2] drm/loongson: Introduce component framework support

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Message-ID: <b4f71869-60e2-4e37-9844-58a4f56b12cb@web.de>
Date: Mon, 29 Jul 2024 08:15:12 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Sui Jingfeng <sui.jingfeng@...ux.dev>, dri-devel@...ts.freedesktop.org
Cc: LKML <linux-kernel@...r.kernel.org>, Maxime Ripard <mripard@...nel.org>,
 Thomas Zimmermann <tzimmermann@...e.de>
Subject: Re: [PATCH v5 1/2] drm/loongson: Introduce component framework
 support

…
> +++ b/drivers/gpu/drm/loongson/loongson_drv.c
> @@ -0,0 +1,298 @@
…
> +static int loongson_drm_freeze(struct drm_device *ddev)
> +{
…
> +	/* unpin all of buffers in the VRAM */
> +	mutex_lock(&ldrm->gem.mutex);
…
> +	mutex_unlock(&ldrm->gem.mutex);
> +
> +	lsdc_bo_evict_vram(ddev);
…

Under which circumstances would you become interested to apply a statement
like “guard(mutex)(&ldrm->gem.mutex);”?
https://elixir.bootlin.com/linux/v6.10.2/source/include/linux/mutex.h#L196

Regards,
Markus