diff mbox series

[net-next,v1,2/2] net: remove __skb_frag_set_page()

Message ID 20230509114634.21079-1-linyunsheng@huawei.com
State New
Headers
Series introduce skb_frag_fill_page_desc() |

Commit Message

Yunsheng Lin May 9, 2023, 11:46 a.m. UTC 
  The remaining users calling __skb_frag_set_page() with
page being NULL seems to be doing defensive programming,
as shinfo->nr_frags is already decremented, so remove
them.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
---
RFC: remove a local variable as pointed out by Simon.
---
 drivers/net/ethernet/broadcom/bnx2.c      |  1 -
 drivers/net/ethernet/broadcom/bnxt/bnxt.c |  5 +----
 include/linux/skbuff.h                    | 12 ------------
 3 files changed, 1 insertion(+), 17 deletions(-)

Comments

Michael Chan May 9, 2023, 6:53 p.m. UTC | #1 
On Tue, May 9, 2023 at 4:48 AM Yunsheng Lin <linyunsheng@huawei.com> wrote:
>
> The remaining users calling __skb_frag_set_page() with
> page being NULL seems to be doing defensive programming,
> as shinfo->nr_frags is already decremented, so remove
> them.
>
> Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>

Thanks.
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Jesse Brandeburg May 9, 2023, 11:49 p.m. UTC | #2 
On 5/9/2023 4:46 AM, Yunsheng Lin wrote:
> The remaining users calling __skb_frag_set_page() with
> page being NULL seems to be doing defensive programming,
> as shinfo->nr_frags is already decremented, so remove
> them.
> 
> Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
> ---
> RFC: remove a local variable as pointed out by Simon.

Makes sense.

Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>

CC: Simon
Simon Horman May 10, 2023, 8:16 a.m. UTC | #3 
On Tue, May 09, 2023 at 04:49:46PM -0700, Jesse Brandeburg wrote:
> On 5/9/2023 4:46 AM, Yunsheng Lin wrote:
> > The remaining users calling __skb_frag_set_page() with
> > page being NULL seems to be doing defensive programming,
> > as shinfo->nr_frags is already decremented, so remove
> > them.
> > 
> > Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
> > ---
> > RFC: remove a local variable as pointed out by Simon.
> 
> Makes sense.
> 
> Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
> 
> CC: Simon

Thanks Yunsheng and Jessee,

this looks good to me.

Reviewed-by: Simon Horman <simon.horman@corigine.com>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c
index 466e1d62bcf6..0d917a9699c5 100644
--- a/drivers/net/ethernet/broadcom/bnx2.c
+++ b/drivers/net/ethernet/broadcom/bnx2.c
@@ -2955,7 +2955,6 @@  bnx2_reuse_rx_skb_pages(struct bnx2 *bp, struct bnx2_rx_ring_info *rxr,
 		shinfo = skb_shinfo(skb);
 		shinfo->nr_frags--;
 		page = skb_frag_page(&shinfo->frags[shinfo->nr_frags]);
-		__skb_frag_set_page(&shinfo->frags[shinfo->nr_frags], NULL);
 
 		cons_rx_pg->page = page;
 		dev_kfree_skb(skb);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index efaff5018af8..f42e51bd3e42 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1102,10 +1102,7 @@  static u32 __bnxt_rx_agg_pages(struct bnxt *bp,
 			xdp_buff_set_frag_pfmemalloc(xdp);
 
 		if (bnxt_alloc_rx_page(bp, rxr, prod, GFP_ATOMIC) != 0) {
-			unsigned int nr_frags;
-
-			nr_frags = --shinfo->nr_frags;
-			__skb_frag_set_page(&shinfo->frags[nr_frags], NULL);
+			--shinfo->nr_frags;
 			cons_rx_buf->page = page;
 
 			/* Update prod since possibly some pages have been
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 30be21c7d05f..00e8c435fa1a 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3491,18 +3491,6 @@  static inline void skb_frag_page_copy(skb_frag_t *fragto,
 	fragto->bv_page = fragfrom->bv_page;
 }
 
-/**
- * __skb_frag_set_page - sets the page contained in a paged fragment
- * @frag: the paged fragment
- * @page: the page to set
- *
- * Sets the fragment @frag to contain @page.
- */
-static inline void __skb_frag_set_page(skb_frag_t *frag, struct page *page)
-{
-	frag->bv_page = page;
-}
-
 bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t prio);
 
 /**