Messages in this thread | | | Date | Fri, 10 Feb 2017 19:28:07 +0100 | From | Sebastian Andrzej Siewior <> | Subject | Re: [PATCH RT] Align rt_mutex inlining with upstream behavior |
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On 2017-02-10 10:09:29 [-0800], Andy Ritger wrote: > Is the > > WARN_ON(rt_mutex_is_locked(lock)); > > in rt_mutex_destroy() valuable in non-CONFIG_DEBUG_MUTEXES kernels, > such that it would be better to always call it, and not noop away mutex_destroy() > non-CONFIG_DEBUG_MUTEXES kernels? I thought that was your objection to > Alex's original patch.
It kind of was… So first I removed the GPL symbol. Then I wasn't too happy about it especially since it was not introduced as part of RT. So I reverted that changed and aligned with mainline behaviour (the mutex_rt.h hunk). But then I noticed that with CONFIG_DEBUG_MUTEXES=n and CONFIG_DEBUG_RT_MUTEXES=y we still have a regression compared to !RT and this was the initial motivation to fix things. Then I got curious why mutex_lock() (which is essential rt_mutex_lock()) works and noticed the wrapper around it. And while looking at it I decided to go back to strip the GPL part from export symbol instead of adding a wrapper. And here I am. Then I was looking at the patch and decided to align with mainline (and keep that one hunk) in case Ingo ask for his GPL symbol.
> Thanks, > - Andy Sebastian
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