Frameworks (e.g. Ion) may want to iterate over each possible CMA area to allow for enumeration. Introduce a function to allow a callback.
Signed-off-by: Laura Abbott labbott@redhat.com --- include/linux/cma.h | 2 ++ mm/cma.c | 14 ++++++++++++++ 2 files changed, 16 insertions(+)
diff --git a/include/linux/cma.h b/include/linux/cma.h index 49f98ea..b521e3c 100644 --- a/include/linux/cma.h +++ b/include/linux/cma.h @@ -33,4 +33,6 @@ extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, struct cma **res_cma); extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align); extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); + +extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); #endif diff --git a/mm/cma.c b/mm/cma.c index 4a93d2b..a430df0 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -464,3 +464,17 @@ bool cma_release(struct cma *cma, const struct page *pages, unsigned int count)
return true; } + +int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data) +{ + int i; + + for (i = 0; i < cma_area_count; i++) { + int ret = it(&cma_areas[i], data); + + if (ret) + return ret; + } + + return 0; +}