linux-kernel - Re: [patch 1/2] x86: define outb_pic and inb_pic to stop using outb_p and inb

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Message-ID: <20080218154546.66e4c72d@core>
Date:	Mon, 18 Feb 2008 15:45:46 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	"David P. Reed" <dpreed@...d.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	"David P. Reed" <dpreed@...d.com>
Subject: Re: [patch 1/2] x86: define outb_pic and inb_pic to stop using
 outb_p and inb_p

> +unsigned char inb_pic(unsigned int port)
> +{
> +	/* delay for some accesses to PIC on motherboard or in chipset must be
> +	   at least one microsecond, but be safe here. */
> +	unsigned char value = inb(port);
> +	udelay(2);
> +	return value;
> +}

inline it. Its almost no instructions
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