On Fri, Mar 15, 2002 at 02:11:49PM -0500, Robert Love wrote:
> If you "poke the processor", to be SMP-safe, you should hold a lock to
> prevent multiple concurrent "pokings of the processor" - thus you become
> preempt-safe.
Without preempt:
x = movefrom processor register;
do_something with x
is safe in SMP
With SMP it requires a lock.
-- --------------------------------------------------------- Victor Yodaiken Finite State Machine Labs: The RTLinux Company. www.fsmlabs.com www.rtlinux.com- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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