linux-kernel - [PATCH v2 3/4] dma-buf: add export symbol for dma-heap

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201201175144.3996569-4-minchan@kernel.org>
Date:   Tue,  1 Dec 2020 09:51:43 -0800
From:   Minchan Kim <minchan@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>,
        hyesoo.yu@...sung.com, willy@...radead.org, david@...hat.com,
        iamjoonsoo.kim@....com, vbabka@...e.cz, surenb@...gle.com,
        pullip.cho@...sung.com, joaodias@...gle.com, hridya@...gle.com,
        sumit.semwal@...aro.org, john.stultz@...aro.org,
        Brian.Starkey@....com, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, robh@...nel.org,
        christian.koenig@....com, linaro-mm-sig@...ts.linaro.org,
        Minchan Kim <minchan@...nel.org>
Subject: [PATCH v2 3/4] dma-buf: add export symbol for dma-heap

From: Hyesoo Yu <hyesoo.yu@...sung.com>

The heaps could be added as module, so some functions should
be exported to register dma-heaps. And dma-heap of module can use
cma area to allocate and free. However the function related cma
is not exported now. Let's export them for next patches.

Signed-off-by: Hyesoo Yu <hyesoo.yu@...sung.com>
Signed-off-by: Minchan Kim <minchan@...nel.org>
---
 drivers/dma-buf/dma-heap.c | 2 ++
 kernel/dma/contiguous.c    | 1 +
 mm/cma.c                   | 5 +++++
 3 files changed, 8 insertions(+)

diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index afd22c9dbdcf..cc6339cbca09 100644
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c
@@ -189,6 +189,7 @@ void *dma_heap_get_drvdata(struct dma_heap *heap)
 {
 	return heap->priv;
 }
+EXPORT_SYMBOL_GPL(dma_heap_get_drvdata);
 
 struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
 {
@@ -272,6 +273,7 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info)
 	kfree(heap);
 	return err_ret;
 }
+EXPORT_SYMBOL_GPL(dma_heap_add);
 
 static char *dma_heap_devnode(struct device *dev, umode_t *mode)
 {
diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c
index 3d63d91cba5c..7e9777119b29 100644
--- a/kernel/dma/contiguous.c
+++ b/kernel/dma/contiguous.c
@@ -58,6 +58,7 @@
 #endif
 
 struct cma *dma_contiguous_default_area;
+EXPORT_SYMBOL_GPL(dma_contiguous_default_area);
 
 /*
  * Default global CMA area size can be defined in kernel's .config.
diff --git a/mm/cma.c b/mm/cma.c
index 4459045fa717..d39cb7066b9e 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -33,6 +33,7 @@
 #include <linux/io.h>
 #include <linux/kmemleak.h>
 #include <linux/swap.h>
+#include <linux/module.h>
 #include <trace/events/cma.h>
 
 #include "cma.h"
@@ -54,6 +55,7 @@ const char *cma_get_name(const struct cma *cma)
 {
 	return cma->name;
 }
+EXPORT_SYMBOL_GPL(cma_get_name);
 
 static unsigned long cma_bitmap_aligned_mask(const struct cma *cma,
 					     unsigned int align_order)
@@ -499,6 +501,7 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align,
 	pr_debug("%s(): returned %p\n", __func__, page);
 	return page;
 }
+EXPORT_SYMBOL_GPL(cma_alloc);
 
 /*
  * cma_alloc_bulk() - allocate high order bulk pages from contiguous area with
@@ -609,6 +612,7 @@ int cma_alloc_bulk(struct cma *cma, unsigned int align, bool fast,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(cma_alloc_bulk);
 
 /**
  * cma_release() - release allocated pages
@@ -642,6 +646,7 @@ bool cma_release(struct cma *cma, const struct page *pages, unsigned int count)
 
 	return true;
 }
+EXPORT_SYMBOL_GPL(cma_release);
 
 int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data)
 {
-- 
2.29.2.454.gaff20da3a2-goog