Re: [PATCH] Fix CPU bitmask truncation

From: Andreas Schwab (schwab@suse.de)
Date: Fri Dec 20 2002 - 07:17:24 EST

William Lee Irwin III <wli@holomorphy.com> writes:

|> ===== include/linux/init_task.h 1.19 vs edited =====
|> --- 1.19/include/linux/init_task.h Sun Sep 29 07:02:55 2002
|> +++ edited/include/linux/init_task.h Fri Dec 20 02:22:04 2002
|> @@ -63,7 +63,7 @@
|> .prio = MAX_PRIO-20, \
|> .static_prio = MAX_PRIO-20, \
|> .policy = SCHED_NORMAL, \
|> - .cpus_allowed = -1, \
|> + .cpus_allowed = ~0UL, \

This is useless. Assigning -1 to any unsigned type is garanteed to give
you all bits one, and with two's complement this also holds for any signed
type.

Andreas. 

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg
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