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Commit e4231bcd authored Apr 18, 2017 by Laura Abbott Committed by Greg Kroah-Hartman Apr 18, 2017

cma: Introduce cma_for_each_area

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent f318dd08

include/linux/cma.h

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -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,		extern struct page cma_alloc(struct cma cma, size_t count, unsigned int align,
	gfp_t gfp_mask);		gfp_t gfp_mask);
	extern bool cma_release(struct cma cma, const struct page pages, unsigned int count);		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		#endif

mm/cma.c

+14 −0

Original line number	Original line	Diff line number	Diff line
	@@ -504,3 +504,17 @@ bool cma_release(struct cma cma, const struct page pages, unsigned int count)

	return true;		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;
			}