On Mon, Oct 16, 2000 at 09:31:42PM -0400, Jeff Garzik wrote:
> I understand SA_INTERRUPT, my question in the previous e-mail was more
> basic: keyboard_interrupt calls handle_kbd_event with local interrupts
> disabled. [..]
Woops sorry, I misunderstood your question.
>[..] Why are local interrupts disabled?
To avoid to deadlock on the kbd_controller_lock in SMP or to race in UP.
Both irq handler and normal kernel context (open/close) will play with the keyb
controller at around address 0x6x and accesses are serialized via the
kbd_controller_lock.
Andrea
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