linux-kernel - Re: 2.6.20-rc7: known regressions

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Message-Id: <200702031033.42940.ak@suse.de>
Date:	Sat, 3 Feb 2007 10:33:42 +0100
From:	Andi Kleen <ak@...e.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Frédéric Riss <frederic.riss@...il.com>,
	Matt Domsch <Matt_Domsch@...l.com>,
	Adrian Bunk <bunk@...sta.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Eric Van Hensbergen <ericvh@...il.com>,
	Trond Myklebust <trond.myklebust@....uio.no>,
	Neil Brown <neilb@...e.de>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Jeff Garzik <jeff@...zik.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Francois Romieu <romieu@...zoreil.com>
Subject: Re: 2.6.20-rc7: known regressions


>  /*
> + * Wrap all the virtual calls in a way that forces the parameters on the stack.
> + */
> +
> +#define efi_call_virt(f, args...) \
> +     ((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args)
> +
> +static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
> +{
> +	return efi_call_virt(get_time, tm, tc);

Wouldn't it be better to just declare the pointers in efi.systab with 
the correct attribute?  Then you wouldn't need all that ugly casting.

-Andi
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