Man page 9 : disk_clear_events

disk_clear_events - synchronously check, clear and return pending events

unsigned int disk_clear_events(struct gendisk *  disk , unsigned int  mask );

disk
    disk to fetch and clear events from

mask
    mask of events to be fetched and clearted

Disk events are synchronously checked and pending events in mask are cleared and returned. This ignores the block count.

Might sleep.