linux-kernel - Re: [patch 00/23]

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Date:	Sat, 30 Sep 2006 01:35:49 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Jim Gettys <jg@...top.org>, John Stultz <johnstul@...ibm.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Dave Jones <davej@...hat.com>
Subject: Re: [patch 00/23]

General readability comment.  This:

enum hrtimer_mode {
	HRTIMER_ABS,	/* Time value is absolute */
	HRTIMER_REL,	/* Time value is relative to now */
};

enum hrtimer_restart {
	HRTIMER_NORESTART,
	HRTIMER_RESTART,
};

#define HRTIMER_INACTIVE	0x00
#define HRTIMER_ACTIVE		0x01
#define HRTIMER_CALLBACK	0x02
#define HRTIMER_PENDING		0x04

is quite bad.  They enumerate different conceptual things but they are all
in the sane namespace.  The reader sees code which is using a mixture of
HRTIMER_ABS, HRTIMER_RESTART and HRTIMER_ACTIVE and gets needlessly
confused over what they all signify.  

This:

enum hrtimer_cb_mode {
	HRTIMER_CB_SOFTIRQ,
	HRTIMER_CB_IRQSAFE,
	HRTIMER_CB_IRQSAFE_NO_RESTART,
	HRTIMER_CB_IRQSAFE_NO_SOFTIRQ,
};

is better.
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