Re: Kernel Semaphores

["Kevin D. Kissell" <kevink@mips.com>]

>> To make it work on 32-bit CPUs, I looked at using
>> the x386 model, but that one uses interrupt disables
>> and is intrinsically SMP-unsafe.
>
>semaphore-helper.h uses spin_lock_irqsave which is smp-safe.  The way
>we do things for 64-bit MIPS is just more performant.


spin_lock_irqsave() in 2.2.12 for MIPS is just a save_and_cli().
The MIPS spin_lock macros all collapse the lock into nothingness.