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Commit 0fe09a45 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

vm: convert snd_pcm_lib_mmap_iomem() to vm_iomap_memory() helper 



This is my example conversion of a few existing mmap users.  The pcm
mmap case is one of the more straightforward ones.

Acked-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent fc9bbca8

sound/core/pcm_native.c

+2 −10
Original line number Diff line number Diff line
@@ -3222,18 +3222,10 @@ EXPORT_SYMBOL_GPL(snd_pcm_lib_default_mmap); 
int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,

			   struct vm_area_struct *area)

{

	long size;

	unsigned long offset;

	struct snd_pcm_runtime *runtime = substream->runtime;;



	area->vm_page_prot = pgprot_noncached(area->vm_page_prot);

	area->vm_flags |= VM_IO;

	size = area->vm_end - area->vm_start;

	offset = area->vm_pgoff << PAGE_SHIFT;

	if (io_remap_pfn_range(area, area->vm_start,

				(substream->runtime->dma_addr + offset) >> PAGE_SHIFT,

				size, area->vm_page_prot))

		return -EAGAIN;

	return 0;

	return vm_iomap_memory(area, runtime->dma_addr, runtime->dma_bytes);

}



EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);