Hello, I'm trying to understand how irq_disable() is supposed to work on PowerPC systems. Most PowerPC PIC do *not* implement the enable and disable, but just the unmask and mask methods, e.g:
http://lxr.linux.no/linux+v2.6.26.5/arch/powerpc/sysdev/mpic.c#L867 The irq_disable() function will then call the default function default_disable(): http://lxr.linux.no/linux+v2.6.26.5/kernel/irq/chip.c#L234 which does not *nothing*. I do not see how the interrupt gets disabled on the hardware level. Obviously I have missed something. TIA for clarification. Wolfgang. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
