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| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2021-10-24 19:40:23 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-10-27 08:20:09 +0200 |
| commit | 9fbd8dc19aa57ec8fe92606043199919527cd9be (patch) | |
| tree | 0be05b49287ea696ecbb850bfc19d2036f15a1cf /kernel/dma | |
| parent | 7d6db80b7d264d6af9dc21baafe59f93cc4607c5 (diff) | |
| download | linux-9fbd8dc19aa57ec8fe92606043199919527cd9be.tar.bz2 | |
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 <christophe.jaillet@wanadoo.fr>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/coherent.c | 5 |
1 files changed, 2 insertions, 3 deletions
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); } |