> > > > Interrupt handler (hardirq context) at CPU0, and process at CPU1, eg > > role switch, unload module, etc. > > the process at CPU1 would need to disable interrupts (spin_lock_irq() or > spin_lock_irqsave()), not the hardirq on CPU0 as that already runs with > interrrupts > disabled. > > https://www.kernel.org/doc/html/latest/kernel-hacking/locking.html#table-of- > minimum-requirements >
I see, thanks. Peter
