On Thu, 7 Dec 2023 at 19:22, Alexander Lobakin <aleksander.loba...@intel.com>
wrote:
> 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.
>
> Signed-off-by: Alexander Lobakin <aleksander.loba...@intel.com>
> ---
> include/net/page_pool/helpers.h | 10 +++++-----
> net/core/page_pool.c | 8 ++++----
> 2 files changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/include/net/page_pool/helpers.h
> b/include/net/page_pool/helpers.h
> index 7dc65774cde5..c860fad50d00 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;
> }
> @@ -357,7 +357,7 @@ 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 59aca3339222..4295aec0be40 100644
> --- a/net/core/page_pool.c
> +++ b/net/core/page_pool.c
> @@ -121,9 +121,9 @@ 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;
> @@ -360,8 +360,8 @@ 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);
> --
> 2.43.0
>
Reviewed-by: Ilias Apalodimas <ilias.apalodi...@linaro.org>
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