Linux Device Drivers Development

Enabling and disabling a tasklet

There is one function to enable a tasklet:

void tasklet_enable(struct tasklet_struct *); 

tasklet_enable simply enables the tasklet. In older kernel versions, you may find void tasklet_hi_enable(struct tasklet_struct *) is used, but those two functions do exactly the same thing. To disable a tasklet, call:

void tasklet_disable(struct tasklet_struct *); 

You can also call:

void tasklet_disable_nosync(struct tasklet_struct *); 

tasklet_disable will disable the tasklet and return only when the tasklet has terminated its execution (if it was running), whereas tasklet_disable_nosync returns immediately, even if the termination has not occurred.