linux-kernel - Re: [PATCH 4/5] x86 idle floppy: delete disable_hlt()/enable

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Message-ID: <m239mcv7by.fsf@firstfloor.org>
Date:	Thu, 24 Mar 2011 08:58:25 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Len Brown <lenb@...nel.org>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org,
	Len Brown <len.brown@...el.com>
Subject: Re: [PATCH 4/5] x86 idle floppy: delete disable_hlt()/enable_hlt()

Len Brown <lenb@...nel.org> writes:
>
> floppy.c said:
>
> "disable hlt during certain critical i/o operations"
>
> x86/kernel/process.c said:
>
> "This halt magic was a workaround for ancient floppy DMA
>  wreckage. It should be safe to remove."

AFAIK it was used on some 386/486s. I suspect it's safe to remove now.

-Andi


-- 
ak@...ux.intel.com -- Speaking for myself only
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