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| author | Yu Zhao <yuzhao@google.com> | 2024-08-13 21:54:50 -0600 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-03 21:15:36 -0700 |
| commit | 463586e9ff398f951a9a63d98a3b93f44434d20c (patch) | |
| tree | ddaacb6643ffc9156b6e46fb7684b3fb6ada2a9f /include/linux/cma.h | |
| parent | e98337d11bbdfa3e3f0fb99aa93e40f97549e0cd (diff) | |
| download | lwn-463586e9ff398f951a9a63d98a3b93f44434d20c.tar.gz lwn-463586e9ff398f951a9a63d98a3b93f44434d20c.zip | |
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 <yuzhao@google.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Cc: Frank van der Linden <fvdl@google.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/cma.h')
| -rw-r--r-- | include/linux/cma.h | 16 |
1 files changed, 16 insertions, 0 deletions
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 |