cvs commit: src/sys/kern kern_mutex.c

John Baldwin jhb at
Tue Jun 5 19:12:26 UTC 2007

On Tuesday 05 June 2007 02:57:09 pm Attilio Rao wrote:
> attilio     2007-06-05 18:57:09 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/kern             kern_mutex.c 
>   Log:
>   Fix a problem with not-preemptive kernels caming from mis-merging of
>   existing code with the new thread_lock patch.
>   This also cleans up a bit unlock operation for mutexes.
>   Approved by: jhb, jeff(mentor)

Specifically, this retires the explicit preemption code in mtx_unlock()
(inherited from BSD/OS) in the #ifndef PREEMPTION case.  We now only do
preemptions as a scheduling decision in the scheduler and only

John Baldwin

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