centos man page for snd_ctl_add_vmaster_hook

SND_CTL_ADD_VMASTER_(9) 					 Control/Mixer API					   SND_CTL_ADD_VMASTER_(9)

NAME
       snd_ctl_add_vmaster_hook - Add a hook to a vmaster control

SYNOPSIS
       int snd_ctl_add_vmaster_hook(struct snd_kcontrol * kcontrol, void (*hook) (void *private_data, int), void * private_data);

ARGUMENTS
       kcontrol
	   vmaster kctl element

       hook
	   the hook function

       private_data
	   the private_data pointer to be saved

DESCRIPTION
       Adds the given hook to the vmaster control element so that it's called at each time when the value is changed.

RETURN
       Zero.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						   SND_CTL_ADD_VMASTER_(9)