linux-kernel - Re: [PATCH v2 04/11] drm/shmem: drop VM

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Message-ID: <fc529a6d-5ece-72d5-f9ca-3d403585a476@arm.com>
Date:   Mon, 23 Sep 2019 14:32:55 +0100
From:   Steven Price <steven.price@....com>
To:     Gerd Hoffmann <kraxel@...hat.com>, dri-devel@...ts.freedesktop.org
Cc:     Maxime Ripard <maxime.ripard@...tlin.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        open list <linux-kernel@...r.kernel.org>,
        David Airlie <airlied@...ux.ie>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Sean Paul <sean@...rly.run>
Subject: Re: [PATCH v2 04/11] drm/shmem: drop VM_IO

On 17/09/2019 10:23, Gerd Hoffmann wrote:
> VM_IO is wrong here, shmem uses normal ram not io memory.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>

Reviewed-by: Steven Price <steven.price@....com>

> ---
>  drivers/gpu/drm/drm_gem_shmem_helper.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/drm_gem_shmem_helper.c b/drivers/gpu/drm/drm_gem_shmem_helper.c
> index 6efedab15016..3bc69b1ffa7d 100644
> --- a/drivers/gpu/drm/drm_gem_shmem_helper.c
> +++ b/drivers/gpu/drm/drm_gem_shmem_helper.c
> @@ -536,7 +536,7 @@ int drm_gem_shmem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
>  		return ret;
>  	}
>  
> -	vma->vm_flags |= VM_IO | VM_MIXEDMAP | VM_DONTEXPAND;
> +	vma->vm_flags |= VM_MIXEDMAP | VM_DONTEXPAND;
>  	vma->vm_page_prot = pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
>  	vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
>  	vma->vm_ops = &drm_gem_shmem_vm_ops;
>