linux-kernel - Re: [ 07/44] ARM: 7477/1: vfp: Always save VFP state in vfp_pm

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Message-ID: <20120814200110.GE5277@herton-Z68MA-D2H-B3>
Date:	Tue, 14 Aug 2012 17:01:11 -0300
From:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Colin Cross <ccross@...roid.com>,
	Barry Song <bs14@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Ido Yariv <ido@...ery.com>, Daniel Drake <dsd@...top.org>,
	Will Deacon <will.deacon@....com>,
	Russell King <rmk+kernel@....linux.org.uk>
Subject: Re: [ 07/44] ARM: 7477/1: vfp: Always save VFP state in
 vfp_pm_suspend on UP

On Mon, Aug 13, 2012 at 03:02:14PM -0700, Greg Kroah-Hartman wrote:
> From: Greg KH <gregkh@...uxfoundation.org>
> 
[...]
> --- a/arch/arm/vfp/vfpmodule.c
> +++ b/arch/arm/vfp/vfpmodule.c
> @@ -412,6 +412,12 @@ static int vfp_pm_suspend(void)
>  
>  		/* disable, just in case */
>  		fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
> +	} else if (vfp_current_hw_state[ti->cpu]) {
> +#ifndef CONFIG_SMP
> +		fmxr(FPEXC, fpexc | FPEXC_EN);
> +		vfp_save_state(vfp_current_hw_state[ti->cpu], fpexc);
> +		fmxr(FPEXC, fpexc);
> +#endif

This fails to build on 3.0:

linux-stable/arch/arm/vfp/vfpmodule.c: In function 'vfp_pm_suspend':
linux-stable/arch/arm/vfp/vfpmodule.c:415:13: error: 'vfp_current_hw_state' undeclared (first use in this function)
linux-stable/arch/arm/vfp/vfpmodule.c:415:13: note: each undeclared identifier is reported only once for each function it appears in
make[3]: *** [arch/arm/vfp/vfpmodule.o] Error 1

In 3.0, vfp_current_hw_state was still named last_VFP_context, so I
think just renaming should be enough to fix this.

>  	}
>  
>  	/* clear any information we had about last context state */
> 

-- 
[]'s
Herton
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