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	<1292482456-22690-5-git-send-email-johlstei@codeaurora.org>
Date: Thu, 16 Dec 2010 12:55:28 +0000
Message-ID: <AANLkTinzVP4rjOZM0PZQGYBNm+z-O=S0h6vo1QVoh+ps@mail.gmail.com>
Subject: Re: [PATCH v5 4/5] msm: hotplug: support cpu hotplug on msm
From: Catalin Marinas <catalin.marinas@arm.com>
To: Jeff Ohlstein <johlstei@codeaurora.org>
Cc: David Brown <davidb@codeaurora.org>,
        Daniel Walker <dwalker@codeaurora.org>, linux-arm-msm@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        Brian Swetland <swetland@google.com>, Dima Zavin <dima@android.com>,
        =?UTF-8?B?QXJ2ZSBIasO4bm5ldsOlZw==?= <arve@android.com>,
        Bryan Huntsman <bryanh@codeaurora.org>,
        Russell King <linux@arm.linux.org.uk>
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On 16 December 2010 06:54, Jeff Ohlstein <johlstei@codeaurora.org> wrote:
> --- /dev/null
> +++ b/arch/arm/mach-msm/hotplug.c
[...]
> +static inline void platform_do_lowpower(unsigned int cpu)
> +{
> +       /* Just enter wfi for now. TODO: Properly shut off the cpu. */
> +       for (;;) {
> +               /*
> +                * here's the WFI
> +                */
> +               asm(".word      0xe320f003\n"
> +                   :
> +                   :
> +                   : "memory", "cc");

Is this for an ARMv7 platform? If yes, you could just use the WFI
instruction directly (and it would also work if compiling the kernel
to Thumb-2 mode).

-- 
Catalin
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