[RFC PATCHv2 02/21] cma: Introduce cma_for_each_area
From: Laura Abbott <hidden>
Date: 2017-03-18 01:49:19
Also in:
dri-devel, linux-media, linux-mm, lkml
Subsystem:
memory management, memory management - misc, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
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 <redacted> --- 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 d41d1f8..3e8fbf5 100644
--- a/include/linux/cma.h
+++ b/include/linux/cma.h@@ -34,4 +34,6 @@ extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, gfp_t gfp_mask); 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 0d187b1..9a040e1 100644
--- a/mm/cma.c
+++ b/mm/cma.c@@ -498,3 +498,17 @@ 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; +}
--
2.7.4