netdev - [PATCH] niu: Use page->private instead of page->index

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Message-ID: <20241216155124.3114-1-willy@infradead.org>
Date: Mon, 16 Dec 2024 15:51:22 +0000
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
To: Andrew Lunn <andrew+netdev@...n.ch>
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org,
	linux-mm@...ck.org
Subject: [PATCH] niu: Use page->private instead of page->index

We are close to removing page->index.  Use page->private instead, which
is least likely to be removed.

Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
 drivers/net/ethernet/sun/niu.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
index df6d35d41b97..d7459866d24c 100644
--- a/drivers/net/ethernet/sun/niu.c
+++ b/drivers/net/ethernet/sun/niu.c
@@ -3303,7 +3303,7 @@ static struct page *niu_find_rxpage(struct rx_ring_info *rp, u64 addr,
 	addr &= PAGE_MASK;
 	pp = &rp->rxhash[h];
 	for (; (p = *pp) != NULL; pp = &niu_next_page(p)) {
-		if (p->index == addr) {
+		if (p->private == addr) {
 			*link = pp;
 			goto found;
 		}
@@ -3318,7 +3318,7 @@ static void niu_hash_page(struct rx_ring_info *rp, struct page *page, u64 base)
 {
 	unsigned int h = niu_hash_rxaddr(rp, base);
 
-	page->index = base;
+	page->private = base;
 	niu_next_page(page) = rp->rxhash[h];
 	rp->rxhash[h] = page;
 }
@@ -3400,11 +3400,11 @@ static int niu_rx_pkt_ignore(struct niu *np, struct rx_ring_info *rp)
 
 		rcr_size = rp->rbr_sizes[(val & RCR_ENTRY_PKTBUFSZ) >>
 					 RCR_ENTRY_PKTBUFSZ_SHIFT];
-		if ((page->index + PAGE_SIZE) - rcr_size == addr) {
+		if ((page->private + PAGE_SIZE) - rcr_size == addr) {
 			*link = niu_next_page(page);
-			np->ops->unmap_page(np->device, page->index,
+			np->ops->unmap_page(np->device, page->private,
 					    PAGE_SIZE, DMA_FROM_DEVICE);
-			page->index = 0;
+			page->private = 0;
 			niu_next_page(page) = NULL;
 			__free_page(page);
 			rp->rbr_refill_pending++;
@@ -3469,11 +3469,11 @@ static int niu_process_rx_pkt(struct napi_struct *napi, struct niu *np,
 			append_size = append_size - skb->len;
 
 		niu_rx_skb_append(skb, page, off, append_size, rcr_size);
-		if ((page->index + rp->rbr_block_size) - rcr_size == addr) {
+		if ((page->private + rp->rbr_block_size) - rcr_size == addr) {
 			*link = niu_next_page(page);
-			np->ops->unmap_page(np->device, page->index,
+			np->ops->unmap_page(np->device, page->private,
 					    PAGE_SIZE, DMA_FROM_DEVICE);
-			page->index = 0;
+			page->private = 0;
 			niu_next_page(page) = NULL;
 			rp->rbr_refill_pending++;
 		} else
@@ -3538,11 +3538,11 @@ static void niu_rbr_free(struct niu *np, struct rx_ring_info *rp)
 		page = rp->rxhash[i];
 		while (page) {
 			struct page *next = niu_next_page(page);
-			u64 base = page->index;
+			u64 base = page->private;
 
 			np->ops->unmap_page(np->device, base, PAGE_SIZE,
 					    DMA_FROM_DEVICE);
-			page->index = 0;
+			page->private = 0;
 			niu_next_page(page) = NULL;
 
 			__free_page(page);
@@ -6460,7 +6460,7 @@ static void niu_reset_buffers(struct niu *np)
 				page = rp->rxhash[j];
 				while (page) {
 					struct page *next = niu_next_page(page);
-					u64 base = page->index;
+					u64 base = page->private;
 					base = base >> RBR_DESCR_ADDR_SHIFT;
 					rp->rbr[k++] = cpu_to_le32(base);
 					page = next;
-- 
2.45.2