diff options
Diffstat (limited to 'include/linux/cma.h')
| -rw-r--r-- | include/linux/cma.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/cma.h b/include/linux/cma.h index bd801023504b..90fd742fd1ef 100644 --- a/include/linux/cma.h +++ b/include/linux/cma.h @@ -20,6 +20,14 @@ #define CMA_MAX_NAME 64 +/* + * TODO: once the buddy -- especially pageblock merging and alloc_contig_range() + * -- can deal with only some pageblocks of a higher-order page being + * MIGRATE_CMA, we can use pageblock_nr_pages. + */ +#define CMA_MIN_ALIGNMENT_PAGES MAX_ORDER_NR_PAGES +#define CMA_MIN_ALIGNMENT_BYTES (PAGE_SIZE * CMA_MIN_ALIGNMENT_PAGES) + struct cma; extern unsigned long totalcma_pages; @@ -50,4 +58,6 @@ extern bool cma_pages_valid(struct cma *cma, const struct page *pages, unsigned extern bool cma_release(struct cma *cma, const struct page *pages, unsigned long count); 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); #endif |