drm/ttm: remove split btw highmen and lowmem page

Split btw highmem and lowmem page was rendered useless by the
pool code. Remove it. Note further cleanup would change the
ttm page allocation helper to actualy take an array instead
of relying on list this could drasticly reduce the number of
function call in the common case of allocation whole buffer.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>

1 files changed, 2 insertions, 9 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index c68b0e770d16..f0c5ffd446d9 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -70,7 +70,7 @@ static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
         struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
         int ret;
 
-        while (NULL == (p = ttm->pages[index])) {
+        if (NULL == (p = ttm->pages[index])) {
 
                 INIT_LIST_HEAD(&h);
 
@@ -86,10 +86,7 @@ static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
                 if (unlikely(ret != 0))
                         goto out_err;
 
-                if (PageHighMem(p))
-                        ttm->pages[--ttm->first_himem_page] = p;
-                else
-                        ttm->pages[++ttm->last_lomem_page] = p;
+                ttm->pages[index] = p;
         }
         return p;
 out_err:
@@ -271,8 +268,6 @@ static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
         ttm_put_pages(&h, count, ttm->page_flags, ttm->caching_state,
                       ttm->dma_address);
         ttm->state = tt_unpopulated;
-        ttm->first_himem_page = ttm->num_pages;
-        ttm->last_lomem_page = -1;
 }
 
 void ttm_tt_destroy(struct ttm_tt *ttm)
@@ -316,8 +311,6 @@ struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
 
         ttm->glob = bdev->glob;
         ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
-        ttm->first_himem_page = ttm->num_pages;
-        ttm->last_lomem_page = -1;
         ttm->caching_state = tt_cached;
         ttm->page_flags = page_flags;