linux-kernel - Re: [PATCH 13/56] microblaze_v2: PVR support, cpuinfo support

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Date:	Mon, 05 May 2008 12:14:23 +1000
From:	John Williams <john.williams@...alogix.com>
To:	monstr@...nam.cz
Cc:	linux-kernel@...r.kernel.org, arnd@...db.de,
	linux-arch@...r.kernel.org, stephen.neuendorffer@...inx.com,
	John.Linn@...inx.com, matthew@....cx, will.newton@...il.com,
	drepper@...hat.com, microblaze-uclinux@...e.uq.edu.au,
	grant.likely@...retlab.ca, Michal Simek <monstr@...str.eu>
Subject: Re: [PATCH 13/56] microblaze_v2: PVR support, cpuinfo support


> +int cpu_has_pvr(void)
> +{
> +	unsigned flags;
> +	unsigned pvr0;
> +	int ret = 0;
> +
> +	local_irq_save(flags);
> +

...

> +out:
> +	local_irq_restore(flags);
> +	return ret;
> +}

The actual IRQ clear/restore is not required - can you just use
local_save_flags() or similar to read the MSR?


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