SND_CTL_ADD_SLAVE_UN(9)                 Control/Mixer API                 SND_CTL_ADD_SLAVE_UN(9)



NAME
       snd_ctl_add_slave_uncached - Add a virtual slave control

SYNOPSIS
       int snd_ctl_add_slave_uncached(struct snd_kcontrol * master, struct snd_kcontrol * slave);

ARGUMENTS
       master
           vmaster element

       slave
           slave element to add

DESCRIPTION
       Add a virtual slave control to the given master. Unlike snd_ctl_add_slave, the element
       added via this function is supposed to have volatile values, and get callback is called at
       each time queried from the master.

       When the control peeks the hardware values directly and the value can be changed by other
       means than the put callback of the element, this function should be used to keep the value
       always up-to-date.

RETURN
       Zero if successful or a negative error code.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   SND_CTL_ADD_SLAVE_UN(9)