snd_ctl_notify
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## Name

snd_ctl_notify — Send notification to user-space for a control change

## Synopsis

`void snd_ctl_notify (` | struct snd_card * card,
| unsigned int mask,
| struct snd_ctl_elem_id * id`)`;

## Arguments

`card`

  the card to send notification

`mask`

  the event mask, SNDRV_CTL_EVENT_*

`id`

  the ctl element id to send notification

## Description

This function adds an event record with the given id and mask, appends to the list and wakes up the user-space for notification. This can be called in the atomic context.

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