centos man page for snd_pcm_lib_alloc_vmalloc_buffer

Query: snd_pcm_lib_alloc_vmalloc_buffer

OS: centos

Section: 9

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

SND_PCM_LIB_ALLOC_VM(9) 					   Sound Devices					   SND_PCM_LIB_ALLOC_VM(9)

NAME
snd_pcm_lib_alloc_vmalloc_buffer - allocate virtual DMA buffer
SYNOPSIS
int snd_pcm_lib_alloc_vmalloc_buffer(struct snd_pcm_substream * substream, size_t size);
ARGUMENTS
substream the substream to allocate the buffer to size the requested buffer size, in bytes
DESCRIPTION
Allocates the PCM substream buffer using vmalloc, i.e., the memory is contiguous in kernel virtual space, but not in physical memory. Use this if the buffer is accessed by kernel code but not by device DMA.
RETURN
1 if the buffer was changed, 0 if not changed, or a negative error code.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 SND_PCM_LIB_ALLOC_VM(9)
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