From 463586e9ff398f951a9a63d98a3b93f44434d20c Mon Sep 17 00:00:00 2001 From: Yu Zhao Date: Tue, 13 Aug 2024 21:54:50 -0600 Subject: mm/cma: add cma_{alloc,free}_folio() With alloc_contig_range() and free_contig_range() supporting large folios, CMA can allocate and free large folios too, by cma_alloc_folio() and cma_free_folio(). [yuzhao@google.com: fix WARN in cma_alloc_folio()] Link: https://lkml.kernel.org/r/Zsd0PgAQmbpR8jS6@google.com Link: https://lkml.kernel.org/r/20240814035451.773331-3-yuzhao@google.com Signed-off-by: Yu Zhao Acked-by: Zi Yan Cc: Frank van der Linden Cc: Matthew Wilcox (Oracle) Cc: Muchun Song Signed-off-by: Andrew Morton --- include/linux/cma.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/linux') diff --git a/include/linux/cma.h b/include/linux/cma.h index 9db877506ea8..d15b64f51336 100644 --- a/include/linux/cma.h +++ b/include/linux/cma.h @@ -52,4 +52,20 @@ extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); extern void cma_reserve_pages_on_error(struct cma *cma); + +#ifdef CONFIG_CMA +struct folio *cma_alloc_folio(struct cma *cma, int order, gfp_t gfp); +bool cma_free_folio(struct cma *cma, const struct folio *folio); +#else +static inline struct folio *cma_alloc_folio(struct cma *cma, int order, gfp_t gfp) +{ + return NULL; +} + +static inline bool cma_free_folio(struct cma *cma, const struct folio *folio) +{ + return false; +} +#endif + #endif -- cgit v1.2.3