Re: [PATCH 1/3] drm/ttm: add set_pages_wb for handling page order more than zero

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Am 22.11.2017 um 12:50 schrieb Chris Wilson:
Quoting Roger He (2017-11-22 11:44:27)
Change-Id: Idf5ccb579d264b343199d8b8344bddeec2c0019f
Signed-off-by: Roger He <Hongbo.He@xxxxxxx>
---
  drivers/gpu/drm/ttm/ttm_page_alloc.c | 11 +++++++++++
  1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index a8b2bfa..cdbb731 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -223,6 +223,17 @@ static struct kobj_type ttm_pool_kobj_type = {
  static struct ttm_pool_manager *_manager;
#ifndef CONFIG_X86
+static int set_pages_wb(struct page *page, int numpages)
+{
+#if IS_ENABLED(CONFIG_AGP)
+       int i;
+
+       for (i = 0; i < numpages; i++)
+               unmap_page_from_agp(page++);
+#endif
+       return 0;
+}
+
  static int set_pages_array_wb(struct page **pages, int addrinarray)
Both of these are shadowing exports from arch/x86, probably not the
wisest choice of names.

That is intended, please note the "#ifndef CONFIG_X86".

Basically TTM provides the same function for other architectures that we have for X86.

Christian.

-Chris
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