Killing a tasklet while holdiing spin_lock_irqsave

Question

I am using the following API to kill a tasklet:

tasklet_kill();

While killing the tasklet, I have disabled local interrupts using spin_lock_irqsave. Why does the kernel throws the following message(warning?):

Attempt to kill tasklet from interrupt

Is it not advisable to use tasklet_kill() while holding a spin_lock?

Answer 1

if you take a look at the func itself you will find it has a call to yield, which can give up the cpu. but that's prohibited with interrupts disabled and/or a spin lock held.