On 2017-12-04 12:42 PM, Christian König wrote:
> When we detect consecutive allocation of pages swap them to avoid
> accidentally freeing them as huge page.
>
> Signed-off-by: Christian König <christian.koenig@xxxxxxx>
> ---
> drivers/gpu/drm/ttm/ttm_page_alloc.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> index c82d94cbbabc..60401350a01a 100644
> --- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
> +++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
> @@ -921,6 +921,14 @@ static int ttm_get_pages(struct page **pages, unsigned npages, int flags,
> return -ENOMEM;
> }
>
> + /* Swap the pages if we detect consecutive order */
> + if (i && pages[i - 1] == p - 1) {
> + struct page *tmp = p;
> +
> + p = pages[i - 1];
> + pages[i - 1] = tmp;
> + }
> +
Should be (something like):
if (i && pages[i - 1] == p - 1)
swap(pages[i - 1], p);
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
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