linux-kernel - Re: [PATCH] Disable PowerMac cpufreq on SMP kernels

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 13 Aug 2009 16:14:58 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Bastian Blank <bastian@...di.eu.org>
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Disable PowerMac cpufreq on SMP kernels

On Tue, 2009-08-11 at 11:39 +0200, Bastian Blank wrote:
> The build of a PowerMac 32bit kernel currently fails with
> 
> error: #warning "WARNING, CPUFREQ not recommended on SMP kernels"
> 
> This patch just disables this driver on SMP kernels, as it is obviously
> not supported.
> 
> Signed-off-by: Bastian Blank <waldi@...ian.org>

Why not remove the #error instead ? :-) I don't think it's still
meaningful, especially since we use the timebase for delays nowadays
which doesn't depend on the CPU frequency...

Ben.

> diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig
> index 04a8061..99d3564 100644
> --- a/arch/powerpc/platforms/Kconfig
> +++ b/arch/powerpc/platforms/Kconfig
> @@ -149,7 +149,7 @@ menu "CPU Frequency drivers"
>  
>  config CPU_FREQ_PMAC
>  	bool "Support for Apple PowerBooks"
> -	depends on ADB_PMU && PPC32
> +	depends on ADB_PMU && PPC32 && !SMP
>  	select CPU_FREQ_TABLE
>  	help
>  	  This adds support for frequency switching on Apple PowerBooks,
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@...r.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/