Messages in this thread Patch in this message | | | From | Alexander Lobakin <> | Subject | [PATCH net-next v5 07/14] page_pool: constify some read-only function arguments | Date | Fri, 24 Nov 2023 16:47:25 +0100 |
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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.lobakin@intel.com> --- include/net/page_pool/helpers.h | 12 ++++++------ net/core/page_pool.c | 12 ++++++------ 2 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/include/net/page_pool/helpers.h b/include/net/page_pool/helpers.h index 28bec368b8e9..528a76c66270 100644 --- a/include/net/page_pool/helpers.h +++ b/include/net/page_pool/helpers.h @@ -59,14 +59,14 @@ #ifdef CONFIG_PAGE_POOL_STATS 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); /* * Drivers that wish to harvest page pool stats and report them to users * (perhaps via ethtool, debugfs, or another mechanism) can allocate a * struct page_pool_stats call page_pool_get_stats to get stats for the specified pool. */ -bool page_pool_get_stats(struct page_pool *pool, +bool page_pool_get_stats(const struct page_pool *pool, struct page_pool_stats *stats); #else static inline int page_pool_ethtool_stats_get_count(void) @@ -79,7 +79,7 @@ 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; } @@ -210,8 +210,8 @@ 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; } @@ -368,7 +368,7 @@ 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 & ~PAGE_POOL_DMA_ADDR_NEED_SYNC; diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 09bdfdfc4788..e5ee49e8799c 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -69,7 +69,7 @@ static const char pp_stats[][ETH_GSTRING_LEN] = { * is passed to this API which is filled in. The caller can then report * those stats to the user (perhaps via ethtool, debugfs, etc.). */ -bool page_pool_get_stats(struct page_pool *pool, +bool page_pool_get_stats(const struct page_pool *pool, struct page_pool_stats *stats) { int cpu = 0; @@ -119,9 +119,9 @@ 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; @@ -338,8 +338,8 @@ 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); @@ -509,7 +509,7 @@ EXPORT_SYMBOL(page_pool_alloc_pages); */ #define _distance(a, b) (s32)((a) - (b)) -static s32 page_pool_inflight(struct page_pool *pool) +static s32 page_pool_inflight(const struct page_pool *pool) { u32 release_cnt = atomic_read(&pool->pages_state_release_cnt); u32 hold_cnt = READ_ONCE(pool->pages_state_hold_cnt); -- 2.42.0
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