The recent changes to msleep() and mawait() resulted in timeout() and untimeout() not being called with Giant in those functions.  For now, use the sched_lock to protect the callout wheel in softclock() and in the various timeout and callout functions.
The recent changes to msleep() and mawait() resulted in timeout() and
untimeout() not being called with Giant in those functions.  For now,
use the sched_lock to protect the callout wheel in softclock() and in
the various timeout and callout functions.

Noticed by:	tegge

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