linux-kernel - Re: [PATCH] drm/xe/oa: Use vma_pages() helper function in xe_oa

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Message-ID: <878qxqhbpl.wl-ashutosh.dixit@intel.com>
Date: Wed, 24 Jul 2024 11:44:06 -0700
From: "Dixit, Ashutosh" <ashutosh.dixit@...el.com>
To: Thorsten Blum <thorsten.blum@...lux.com>
Cc: lucas.demarchi@...el.com,
	thomas.hellstrom@...ux.intel.com,
	rodrigo.vivi@...el.com,
	maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	daniel@...ll.ch,
	intel-xe@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/xe/oa: Use vma_pages() helper function in xe_oa_mmap()

On Wed, 24 Jul 2024 11:18:27 -0700, Thorsten Blum wrote:
>
> Use the vma_pages() helper function and remove the following
> Coccinelle/coccicheck warning reported by vma_pages.cocci:
>
>   WARNING: Consider using vma_pages helper on vma

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@...el.com>

>
> Signed-off-by: Thorsten Blum <thorsten.blum@...lux.com>
> ---
>  drivers/gpu/drm/xe/xe_oa.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c
> index 6d69f751bf78..133292a9d687 100644
> --- a/drivers/gpu/drm/xe/xe_oa.c
> +++ b/drivers/gpu/drm/xe/xe_oa.c
> @@ -1244,8 +1244,7 @@ static int xe_oa_mmap(struct file *file, struct vm_area_struct *vma)
>	vm_flags_mod(vma, VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP | VM_DONTCOPY,
>		     VM_MAYWRITE | VM_MAYEXEC);
>
> -	xe_assert(stream->oa->xe, bo->ttm.ttm->num_pages ==
> -		  (vma->vm_end - vma->vm_start) >> PAGE_SHIFT);
> +	xe_assert(stream->oa->xe, bo->ttm.ttm->num_pages == vma_pages(vma));
>	for (i = 0; i < bo->ttm.ttm->num_pages; i++) {
>		ret = remap_pfn_range(vma, start, page_to_pfn(bo->ttm.ttm->pages[i]),
>				      PAGE_SIZE, vma->vm_page_prot);
> --
> 2.45.2
>