linux-kernel - Re: [PATCH] IA64/perfmon: kill dead code, clean irq handling

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Message-ID: <20071025084615.GA32656@frankl.hpl.hp.com>
Date:	Thu, 25 Oct 2007 01:46:15 -0700
From:	Stephane Eranian <eranian@....hp.com>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	tony.luck@...el.com, linux-ia64@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, joshua.i.stone@...el.com,
	juan.villacis@...el.com
Subject: Re: [PATCH] IA64/perfmon: kill dead code, clean irq handling

Jeff,

On Tue, Oct 23, 2007 at 07:09:08PM -0400, Jeff Garzik wrote:
> 
> By deleting unused code, this makes perfmon irq handling more efficient,
> as well as reducing code size.
> 
> * remove unused pfm_install_alt_pmu_interrupt()
> * remove unused pfm_remove_alt_pmu_interrupt()
> 
I have not problem with the patch except maybe for those two functions.
How do you know they are not used?
Have you checked the VTUNE open-source driver?
I thought at some point they were using this hook.


> * remove now-unused pfm_alt_intr_handler pointer, and associated
>   function call in perfmon interrupt handler.
> 
> * remove unused 'irq' argument from pfm_do_interrupt_handler()
> 
> * un-indent code in pfm_interrupt_handler() now that
>   pfm_alt_intr_handler is no longer used.
> 
--
-Stephane
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