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Message-Id: <1488491084-17252-10-git-send-email-labbott@redhat.com>
Date: Thu, 2 Mar 2017 13:44:41 -0800
From: Laura Abbott <labbott@...hat.com>
To: Sumit Semwal <sumit.semwal@...aro.org>,
Riley Andrews <riandrews@...roid.com>, arve@...roid.com
Cc: Laura Abbott <labbott@...hat.com>, romlem@...gle.com,
devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
linaro-mm-sig@...ts.linaro.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
dri-devel@...ts.freedesktop.org,
Brian Starkey <brian.starkey@....com>,
Daniel Vetter <daniel.vetter@...el.com>,
Mark Brown <broonie@...nel.org>,
Benjamin Gaignard <benjamin.gaignard@...aro.org>,
linux-mm@...ck.org
Subject: [RFC PATCH 09/12] 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@...hat.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;
+}
--
2.7.4
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