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Date:   Fri, 28 Aug 2020 10:59:17 +0200
From:   "Ahmed S. Darwish" <a.darwish@linutronix.de>
To:     peterz@infradead.org
Cc:     Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        "Sebastian A. Siewior" <bigeasy@linutronix.de>,
        "Paul E. McKenney" <paulmck@kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1 2/5] seqlock: Use unique prefix for seqcount_t
 property accessors
Message-ID: <20200828085917.GA7205@lx-t490>
References: <20200519214547.352050-1-a.darwish@linutronix.de>
 <20200828010710.5407-1-a.darwish@linutronix.de>
 <20200828010710.5407-3-a.darwish@linutronix.de>
 <20200828082754.GN1362448@hirez.programming.kicks-ass.net>
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On Fri, Aug 28, 2020 at 10:27:54AM +0200, peterz@infradead.org wrote:
> On Fri, Aug 28, 2020 at 03:07:07AM +0200, Ahmed S. Darwish wrote:
> > Differentiate the first group by using "__seqcount_t_" as prefix. This
> > also conforms with the rest of seqlock.h naming conventions.
>
> >  #define __seqprop_case(s, locktype, prop)				\
> >  	seqcount_##locktype##_t: __seqcount_##locktype##_##prop((void *)(s))
> >
> >  #define __seqprop(s, prop) _Generic(*(s),				\
> > -	seqcount_t:		__seqcount_##prop((void *)(s)),		\
> > +	seqcount_t:		__seqcount_t_##prop((void *)(s)),	\
> >  	__seqprop_case((s),	raw_spinlock,	prop),			\
> >  	__seqprop_case((s),	spinlock,	prop),			\
> >  	__seqprop_case((s),	rwlock,		prop),			\
>
> If instead you do:
>
> #define __seqprop_case(s, _lockname, prop) \
> 	seqcount##_lockname##_t: __seqcount##_lockname##_##prop((void *)(s))
>
> You can have:
>
> 	__seqprop_case((s),	,		prop),
> 	__seqprop_case((s),	_raw_spinlock,	prop),
> 	__seqprop_case((s),	_spinlock,	prop),
> 	__seqprop_case((s),	_rwlock,	prop),
> 	__seqprop_case((s),	_mutex,		prop),
> 	__seqprop_case((s),	_ww_mutex,	prop),
>
> And it's all good again.
>
> Although arguably we should do something like s/__seqcount/__seqprop/
> over this lot.
>

ACK.