From 9fbd8dc19aa57ec8fe92606043199919527cd9be Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Sun, 24 Oct 2021 19:40:23 +0200 Subject: dma-mapping: use 'bitmap_zalloc()' when applicable 'dma_mem->bitmap' is a bitmap. So use 'bitmap_zalloc()' to simplify code, improve the semantic and avoid some open-coded arithmetic in allocator arguments. Also change the corresponding 'kfree()' into 'bitmap_free()' to keep consistency. Signed-off-by: Christophe JAILLET Signed-off-by: Christoph Hellwig --- kernel/dma/coherent.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'kernel') diff --git a/kernel/dma/coherent.c b/kernel/dma/coherent.c index 25fc85a7aebe..375fb3c9538d 100644 --- a/kernel/dma/coherent.c +++ b/kernel/dma/coherent.c @@ -40,7 +40,6 @@ static struct dma_coherent_mem *dma_init_coherent_memory(phys_addr_t phys_addr, { struct dma_coherent_mem *dma_mem; int pages = size >> PAGE_SHIFT; - int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long); void *mem_base; if (!size) @@ -53,7 +52,7 @@ static struct dma_coherent_mem *dma_init_coherent_memory(phys_addr_t phys_addr, dma_mem = kzalloc(sizeof(struct dma_coherent_mem), GFP_KERNEL); if (!dma_mem) goto out_unmap_membase; - dma_mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL); + dma_mem->bitmap = bitmap_zalloc(pages, GFP_KERNEL); if (!dma_mem->bitmap) goto out_free_dma_mem; @@ -81,7 +80,7 @@ static void dma_release_coherent_memory(struct dma_coherent_mem *mem) return; memunmap(mem->virt_base); - kfree(mem->bitmap); + bitmap_free(mem->bitmap); kfree(mem); } -- cgit v1.2.3