linux-kernel - Re: [PATCH v5] HPET: Remove the BKL.

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Date:	Tue, 21 Oct 2008 19:35:26 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	David John <davidjon@...ontk.org>
Cc:	mingo@...e.hu, akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	linux-kernel@...r.kernel.org, venkatesh.pallipadi@...el.com,
	tglx@...utronix.de
Subject: Re: [PATCH v5] HPET: Remove the BKL.

David John <davidjon@...ontk.org> writes:

>  	switch (cmd) {
>  	case HPET_IE_OFF:
> -		if ((devp->hd_flags & HPET_IE) == 0)
> +		spin_lock_irq(&hpet_lock);
> +		if ((devp->hd_flags & HPET_IE) == 0) {
> +			spin_unlock_irq(&hpet_lock);
>  			break;

Reads don't need to be locked here, so you could just move the spin_lock_irq
down a bit and avoid the redundant unlock_irq. Same below.

> +		}

-Andi

-- 
ak@...ux.intel.com
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