[PATCH] mm/cma.c: Switch to bitmap_zalloc() for cma bitmap allocation

[Yunfeng Ye]

kzalloc() is used for cma bitmap allocation in cma_activate_area(),
switch to bitmap_zalloc() is more clearly.

Signed-off-by: Yunfeng Ye <yeyunf...@huawei.com>
---
 mm/cma.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/mm/cma.c b/mm/cma.c
index 7fe0b83..be55d19 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -95,13 +95,11 @@ static void cma_clear_bitmap(struct cma *cma, unsigned long 
pfn,

 static int __init cma_activate_area(struct cma *cma)
 {
-       int bitmap_size = BITS_TO_LONGS(cma_bitmap_maxno(cma)) * sizeof(long);
        unsigned long base_pfn = cma->base_pfn, pfn = base_pfn;
        unsigned i = cma->count >> pageblock_order;
        struct zone *zone;

-       cma->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
-
+       cma->bitmap = bitmap_zalloc(cma_bitmap_maxno(cma), GFP_KERNEL);
        if (!cma->bitmap) {
                cma->count = 0;
                return -ENOMEM;
@@ -139,7 +137,7 @@ static int __init cma_activate_area(struct cma *cma)

 not_in_zone:
        pr_err("CMA area %s could not be activated\n", cma->name);
-       kfree(cma->bitmap);
+       bitmap_free(cma->bitmap);
        cma->count = 0;
        return -EINVAL;
 }
-- 
2.7.4