* [patch 137/158] mm/cma.c: switch to bitmap_zalloc() for cma bitmap allocation
@ 2019-12-01 1:57 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2019-12-01 1:57 UTC (permalink / raw)
To: akpm, andreyknvl, aryabinin, huyue2, linux-mm, mm-commits,
opendmb, peng.fan, rppt, ryh.szk.cmnty, tglx, torvalds,
yeyunfeng
From: Yunfeng Ye <yeyunfeng@huawei.com>
Subject: mm/cma.c: switch to bitmap_zalloc() for cma bitmap allocation
kzalloc() is used for cma bitmap allocation in cma_activate_area(),
switch to bitmap_zalloc() for clarity.
Link: http://lkml.kernel.org/r/895d4627-f115-c77a-d454-c0a196116426@huawei.com
Signed-off-by: Yunfeng Ye <yeyunfeng@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Yue Hu <huyue2@yulong.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Ryohei Suzuki <ryh.szk.cmnty@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Doug Berger <opendmb@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/cma.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
--- a/mm/cma.c~mm-cmac-switch-to-bitmap_zalloc-for-cma-bitmap-allocation
+++ a/mm/cma.c
@@ -95,13 +95,11 @@ static void cma_clear_bitmap(struct cma
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(stru
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;
}
_
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2019-12-01 1:57 [patch 137/158] mm/cma.c: switch to bitmap_zalloc() for cma bitmap allocation akpm
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