From: Byungchul Park <byungchul@sk.com>
To: willy@infradead.org, netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
kernel_team@skhynix.com, kuba@kernel.org, almasrymina@google.com,
ilias.apalodimas@linaro.org, harry.yoo@oracle.com,
hawk@kernel.org, akpm@linux-foundation.org, davem@davemloft.net,
john.fastabend@gmail.com, andrew+netdev@lunn.ch,
asml.silence@gmail.com, toke@redhat.com, tariqt@nvidia.com,
edumazet@google.com, pabeni@redhat.com, saeedm@nvidia.com,
leon@kernel.org, ast@kernel.org, daniel@iogearbox.net,
david@redhat.com, lorenzo.stoakes@oracle.com,
Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org,
surenb@google.com, mhocko@suse.com, horms@kernel.org,
linux-rdma@vger.kernel.org, bpf@vger.kernel.org,
vishal.moola@gmail.com, hannes@cmpxchg.org, ziy@nvidia.com,
jackmanb@google.com
Subject: [PATCH net-next v7 6/7] page_pool: make page_pool_get_dma_addr() just wrap page_pool_get_dma_addr_netmem()
Date: Wed, 25 Jun 2025 13:33:49 +0900 [thread overview]
Message-ID: <20250625043350.7939-7-byungchul@sk.com> (raw)
In-Reply-To: <20250625043350.7939-1-byungchul@sk.com>
The page pool members in struct page cannot be removed unless it's not
allowed to access any of them via struct page.
Do not access 'page->dma_addr' directly in page_pool_get_dma_addr() but
just wrap page_pool_get_dma_addr_netmem() safely.
Signed-off-by: Byungchul Park <byungchul@sk.com>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
---
include/net/page_pool/helpers.h | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/include/net/page_pool/helpers.h b/include/net/page_pool/helpers.h
index 773fc65780b5..db180626be06 100644
--- a/include/net/page_pool/helpers.h
+++ b/include/net/page_pool/helpers.h
@@ -444,12 +444,7 @@ static inline dma_addr_t page_pool_get_dma_addr_netmem(netmem_ref netmem)
*/
static inline dma_addr_t page_pool_get_dma_addr(const struct page *page)
{
- dma_addr_t ret = page->dma_addr;
-
- if (PAGE_POOL_32BIT_ARCH_WITH_64BIT_DMA)
- ret <<= PAGE_SHIFT;
-
- return ret;
+ return page_pool_get_dma_addr_netmem(page_to_netmem(page));
}
static inline void __page_pool_dma_sync_for_cpu(const struct page_pool *pool,
--
2.17.1
next prev parent reply other threads:[~2025-06-25 4:34 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-25 4:33 [PATCH net-next v7 0/7] Split netmem from struct page Byungchul Park
2025-06-25 4:33 ` [PATCH net-next v7 1/7] netmem: introduce struct netmem_desc mirroring " Byungchul Park
2025-06-27 0:49 ` Jakub Kicinski
2025-06-27 3:54 ` Byungchul Park
2025-06-28 0:37 ` Jakub Kicinski
2025-06-29 23:34 ` Harry Yoo
2025-07-01 23:45 ` Jakub Kicinski
2025-07-07 0:21 ` Byungchul Park
2025-07-07 18:42 ` Jakub Kicinski
2025-07-14 9:42 ` Harry Yoo
2025-07-14 13:24 ` Vlastimil Babka
2025-07-14 13:58 ` Harry Yoo
2025-07-15 1:47 ` Jakub Kicinski
2025-07-15 2:08 ` Byungchul Park
2025-07-15 10:23 ` Pavel Begunkov
2025-06-25 4:33 ` [PATCH net-next v7 2/7] page_pool: rename page_pool_return_page() to page_pool_return_netmem() Byungchul Park
2025-06-25 4:33 ` [PATCH net-next v7 3/7] page_pool: rename __page_pool_release_page_dma() to __page_pool_release_netmem_dma() Byungchul Park
2025-06-25 4:33 ` [PATCH net-next v7 4/7] page_pool: rename __page_pool_alloc_pages_slow() to __page_pool_alloc_netmems_slow() Byungchul Park
2025-06-25 4:33 ` [PATCH net-next v7 5/7] netmem: use _Generic to cover const casting for page_to_netmem() Byungchul Park
2025-06-25 4:33 ` Byungchul Park [this message]
2025-06-25 4:33 ` [PATCH net-next v7 7/7] netmem: introduce a netmem API, virt_to_head_netmem() Byungchul Park
2025-06-27 0:49 ` Jakub Kicinski
2025-06-26 6:41 ` [PATCH net-next v7 0/7] Split netmem from struct page Byungchul Park
2025-06-27 0:50 ` Jakub Kicinski
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