From: Yunfeng Ye <yeyunfeng@xxxxxxxxxx> 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@xxxxxxxxxx Signed-off-by: Yunfeng Ye <yeyunfeng@xxxxxxxxxx> Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Mike Rapoport <rppt@xxxxxxxxxxxxx> Cc: Yue Hu <huyue2@xxxxxxxxxx> Cc: Peng Fan <peng.fan@xxxxxxx> Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> Cc: Ryohei Suzuki <ryh.szk.cmnty@xxxxxxxxx> Cc: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Cc: Doug Berger <opendmb@xxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- 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; } _
