From: Alexander Lobakin <aleksander.lobakin@intel.com>
To: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: Alexander Lobakin <aleksander.lobakin@intel.com>,
Alexander Duyck <alexanderduyck@fb.com>,
Yunsheng Lin <linyunsheng@huawei.com>,
David Christensen <drc@linux.vnet.ibm.com>,
Jesper Dangaard Brouer <hawk@kernel.org>,
Ilias Apalodimas <ilias.apalodimas@linaro.org>,
Paul Menzel <pmenzel@molgen.mpg.de>,
nex.sw.ncis.osdt.itp.upstreaming@intel.com,
netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org,
linux-kernel@vger.kernel.org
Subject: [PATCH net-next v8 4/8] page_pool: constify some read-only function arguments
Date: Fri, 8 Mar 2024 15:18:29 +0100 [thread overview]
Message-ID: <20240308141833.2966600-5-aleksander.lobakin@intel.com> (raw)
In-Reply-To: <20240308141833.2966600-1-aleksander.lobakin@intel.com>
There are several functions taking pointers to data they don't modify.
This includes statistics fetching, page and page_pool parameters, etc.
Constify the pointers, so that call sites will be able to pass const
pointers as well.
No functional changes, no visible changes in functions sizes.
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
---
include/net/page_pool/types.h | 4 ++--
include/net/page_pool/helpers.h | 10 +++++-----
net/core/page_pool.c | 10 +++++-----
3 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/include/net/page_pool/types.h b/include/net/page_pool/types.h
index 5e43a08d3231..a6ebed002216 100644
--- a/include/net/page_pool/types.h
+++ b/include/net/page_pool/types.h
@@ -213,7 +213,7 @@ struct xdp_mem_info;
#ifdef CONFIG_PAGE_POOL
void page_pool_destroy(struct page_pool *pool);
void page_pool_use_xdp_mem(struct page_pool *pool, void (*disconnect)(void *),
- struct xdp_mem_info *mem);
+ const struct xdp_mem_info *mem);
void page_pool_put_page_bulk(struct page_pool *pool, void **data,
int count);
#else
@@ -223,7 +223,7 @@ static inline void page_pool_destroy(struct page_pool *pool)
static inline void page_pool_use_xdp_mem(struct page_pool *pool,
void (*disconnect)(void *),
- struct xdp_mem_info *mem)
+ const struct xdp_mem_info *mem)
{
}
diff --git a/include/net/page_pool/helpers.h b/include/net/page_pool/helpers.h
index 1d397c1a0043..c7bb06750e85 100644
--- a/include/net/page_pool/helpers.h
+++ b/include/net/page_pool/helpers.h
@@ -58,7 +58,7 @@
/* Deprecated driver-facing API, use netlink instead */
int page_pool_ethtool_stats_get_count(void);
u8 *page_pool_ethtool_stats_get_strings(u8 *data);
-u64 *page_pool_ethtool_stats_get(u64 *data, void *stats);
+u64 *page_pool_ethtool_stats_get(u64 *data, const void *stats);
bool page_pool_get_stats(const struct page_pool *pool,
struct page_pool_stats *stats);
@@ -73,7 +73,7 @@ static inline u8 *page_pool_ethtool_stats_get_strings(u8 *data)
return data;
}
-static inline u64 *page_pool_ethtool_stats_get(u64 *data, void *stats)
+static inline u64 *page_pool_ethtool_stats_get(u64 *data, const void *stats)
{
return data;
}
@@ -204,8 +204,8 @@ static inline void *page_pool_dev_alloc_va(struct page_pool *pool,
* Get the stored dma direction. A driver might decide to store this locally
* and avoid the extra cache line from page_pool to determine the direction.
*/
-static
-inline enum dma_data_direction page_pool_get_dma_dir(struct page_pool *pool)
+static inline enum dma_data_direction
+page_pool_get_dma_dir(const struct page_pool *pool)
{
return pool->p.dma_dir;
}
@@ -370,7 +370,7 @@ static inline void page_pool_free_va(struct page_pool *pool, void *va,
* Fetch the DMA address of the page. The page pool to which the page belongs
* must had been created with PP_FLAG_DMA_MAP.
*/
-static inline dma_addr_t page_pool_get_dma_addr(struct page *page)
+static inline dma_addr_t page_pool_get_dma_addr(const struct page *page)
{
dma_addr_t ret = page->dma_addr;
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index d706fe5548df..a8a1c087f048 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -123,9 +123,9 @@ int page_pool_ethtool_stats_get_count(void)
}
EXPORT_SYMBOL(page_pool_ethtool_stats_get_count);
-u64 *page_pool_ethtool_stats_get(u64 *data, void *stats)
+u64 *page_pool_ethtool_stats_get(u64 *data, const void *stats)
{
- struct page_pool_stats *pool_stats = stats;
+ const struct page_pool_stats *pool_stats = stats;
*data++ = pool_stats->alloc_stats.fast;
*data++ = pool_stats->alloc_stats.slow;
@@ -383,8 +383,8 @@ static struct page *__page_pool_get_cached(struct page_pool *pool)
return page;
}
-static void page_pool_dma_sync_for_device(struct page_pool *pool,
- struct page *page,
+static void page_pool_dma_sync_for_device(const struct page_pool *pool,
+ const struct page *page,
unsigned int dma_sync_size)
{
dma_addr_t dma_addr = page_pool_get_dma_addr(page);
@@ -954,7 +954,7 @@ static void page_pool_release_retry(struct work_struct *wq)
}
void page_pool_use_xdp_mem(struct page_pool *pool, void (*disconnect)(void *),
- struct xdp_mem_info *mem)
+ const struct xdp_mem_info *mem)
{
refcount_inc(&pool->user_cnt);
pool->disconnect = disconnect;
--
2.44.0
next prev parent reply other threads:[~2024-03-08 14:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-08 14:18 [PATCH net-next v8 0/8] net: intel: start The Great Code Dedup + Page Pool for iavf Alexander Lobakin
2024-03-08 14:18 ` [PATCH net-next v8 1/8] net: intel: introduce {,Intel} Ethernet common library Alexander Lobakin
2024-03-08 14:18 ` [PATCH net-next v8 2/8] iavf: kill "legacy-rx" for good Alexander Lobakin
2024-03-08 14:18 ` [PATCH net-next v8 3/8] iavf: drop page splitting and recycling Alexander Lobakin
2024-03-08 14:18 ` Alexander Lobakin [this message]
2024-03-08 14:18 ` [PATCH net-next v8 5/8] page_pool: add DMA-sync-for-CPU inline helper Alexander Lobakin
2024-03-08 14:18 ` [PATCH net-next v8 6/8] libeth: add Rx buffer management Alexander Lobakin
2024-03-08 14:18 ` [PATCH net-next v8 7/8] iavf: pack iavf_ring more efficiently Alexander Lobakin
2024-03-08 14:18 ` [PATCH net-next v8 8/8] iavf: switch to Page Pool Alexander Lobakin
2024-03-09 4:05 ` [PATCH net-next v8 0/8] net: intel: start The Great Code Dedup + Page Pool for iavf Jakub Kicinski
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