[RFC 03/19] page_pool: use netmem alloc/put API in __page_pool_alloc_page_order()

[Byungchul Park]

Use netmem alloc/put API instead of page alloc/put API and make it
return netmem_ref instead of struct page * in
__page_pool_alloc_page_order().

Signed-off-by: Byungchul Park <byungchul@xxxxxx>
---
 net/core/page_pool.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 575fdab337414..9f5e07a15f707 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -498,29 +498,29 @@ static bool page_pool_dma_map(struct page_pool *pool, netmem_ref netmem)
 	return false;
 }
 
-static struct page *__page_pool_alloc_page_order(struct page_pool *pool,
+static netmem_ref __page_pool_alloc_page_order(struct page_pool *pool,
 						 gfp_t gfp)
 {
-	struct page *page;
+	netmem_ref netmem;
 
 	gfp |= __GFP_COMP;
-	page = alloc_pages_node(pool->p.nid, gfp, pool->p.order);
-	if (unlikely(!page))
-		return NULL;
+	netmem = alloc_netmems_node(pool->p.nid, gfp, pool->p.order);
+	if (unlikely(!netmem))
+		return 0;
 
-	if (pool->dma_map && unlikely(!page_pool_dma_map(pool, page_to_netmem(page)))) {
-		put_page(page);
-		return NULL;
+	if (pool->dma_map && unlikely(!page_pool_dma_map(pool, netmem))) {
+		put_netmem(netmem);
+		return 0;
 	}
 
 	alloc_stat_inc(pool, slow_high_order);
-	page_pool_set_pp_info(pool, page_to_netmem(page));
+	page_pool_set_pp_info(pool, netmem);
 
 	/* Track how many pages are held 'in-flight' */
 	pool->pages_state_hold_cnt++;
-	trace_page_pool_state_hold(pool, page_to_netmem(page),
+	trace_page_pool_state_hold(pool, netmem,
 				   pool->pages_state_hold_cnt);
-	return page;
+	return netmem;
 }
 
 /* slow path */
@@ -535,7 +535,7 @@ static noinline netmem_ref __page_pool_alloc_pages_slow(struct page_pool *pool,
 
 	/* Don't support bulk alloc for high-order pages */
 	if (unlikely(pp_order))
-		return page_to_netmem(__page_pool_alloc_page_order(pool, gfp));
+		return __page_pool_alloc_page_order(pool, gfp);
 
 	/* Unnecessary as alloc cache is empty, but guarantees zero count */
 	if (unlikely(pool->alloc.count > 0))
-- 
2.17.1