linux-kernel - Re: [PATCH] wfcqueue: functions for local append and enqueue

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Message-ID: <20130322103146.GA9078@dcvr.yhbt.net>
Date:	Fri, 22 Mar 2013 10:31:46 +0000
From:	Eric Wong <normalperson@...t.net>
To:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:	Lai Jiangshan <laijs@...fujitsu.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] wfcqueue: functions for local append and enqueue

Mathieu Desnoyers <mathieu.desnoyers@...icios.com> wrote:
> * Eric Wong (normalperson@...t.net) wrote:
> >  /*
> > + * __wfcq_append_local: append one local queue to another local queue
> > + *
> > + * No memory barriers are issued.  Mutual exclusion is the responsibility
> > + * of the caller.
> > + *
> > + * Returns false if the queue was empty prior to adding the node.
> > + * Returns true otherwise.
> > + */
> > +static inline bool __wfcq_append_local(struct wfcq_head *head,
> 
> Following the rest of the header, we could use:
> 
> ___wfcq_append() for this function,

OK.

However, I think ___ is a little confusing (but I'm easily confused :x).
I didn't even realize some functions in wfcqueue.h had ___ (vs __) until
just now(!)

But I will resend later tonight/tomorrow with ___ for consistency with
the existing API unless I've convinced you "_local" is easier :)

On a related note to underscores, I totally missed the existence of
____cacheline_aligned_in_smp in my first RFC even though I had seen
the __ version for .data around.

> and:
> 
> __wfcq_enqueue()
> 
> we should also update the "Synchronization table" at the beginning of
> the file accordingly.

Will update.
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