diff mbox

[net-next] niu: remove one compound_head() call

Message ID 1421415570.11734.130.camel@edumazet-glaptop2.roam.corp.google.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Eric Dumazet Jan. 16, 2015, 1:39 p.m. UTC 
From: Eric Dumazet <edumazet@google.com>

After a "page = alloc_page(mask);", we do not need to use
compound_head() : page already points to the right place.

This would be true even if using alloc_pages().

Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 drivers/net/ethernet/sun/niu.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)



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Comments

David Miller Jan. 18, 2015, 4:59 a.m. UTC | #1 
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 16 Jan 2015 05:39:30 -0800

> From: Eric Dumazet <edumazet@google.com>
> 
> After a "page = alloc_page(mask);", we do not need to use
> compound_head() : page already points to the right place.
> 
> This would be true even if using alloc_pages().
> 
> Signed-off-by: Eric Dumazet <edumazet@google.com>

Applied.
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diff mbox

Patch

diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
index 0c6416213837..4b51f903fb73 100644
--- a/drivers/net/ethernet/sun/niu.c
+++ b/drivers/net/ethernet/sun/niu.c
@@ -3341,8 +3341,7 @@  static int niu_rbr_add_page(struct niu *np, struct rx_ring_info *rp,
 
 	niu_hash_page(rp, page, addr);
 	if (rp->rbr_blocks_per_page > 1)
-		atomic_add(rp->rbr_blocks_per_page - 1,
-			   &compound_head(page)->_count);
+		atomic_add(rp->rbr_blocks_per_page - 1, &page->_count);
 
 	for (i = 0; i < rp->rbr_blocks_per_page; i++) {
 		__le32 *rbr = &rp->rbr[start_index + i];