linux-kernel - Re: [PATCH 07/12] Xen: Make events.c portable for ia64/xen support.

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Message-ID: <47ED54CE.7000007@goop.org>
Date:	Fri, 28 Mar 2008 13:27:58 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Isaku Yamahata <yamahata@...inux.co.jp>
CC:	chrisw@...s-sol.org, sct@...hat.com,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, xen-ia64-devel@...ts.xensource.com,
	eddie.dong@...el.com
Subject: Re: [PATCH 07/12] Xen: Make events.c portable for ia64/xen support.

Isaku Yamahata wrote:
> +/* macro to avoid header inclusion dependncy hell */
> +#define xen_irqs_disabled(regs)	(!((regs)->flags & X86_EFLAGS_IF))
>   

This seems pretty generic.  Is there no suitable existing function?  
Could irqs_disabled_flags() be pressed into service?  I guess it depends 
on how ia64 (and other architectures) can get the saved flags state from 
the interrupt context.

> +
> +/* macro to avoid header inclusion dependncy hell */
> +#define xen_do_IRQ(irq, regs)			\
> +	do {					\
> +		(regs)->orig_ax = ~(irq);	\
> +		do_IRQ(regs);			\
> +	} while (0)
>   

It's not possible to put this somewhere it could be an inline function?  
It might be better to make it an out of line function then.

    J
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