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Date:   Wed, 10 Oct 2018 10:25:36 +0800
From:   Yi Sun <yi.y.sun@linux.intel.com>
To:     Ingo Molnar <mingo@kernel.org>
Cc:     linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de,
        jgross@suse.com, chao.p.peng@intel.com, chao.gao@intel.com,
        isaku.yamahata@intel.com, michael.h.kelley@microsoft.com,
        tianyu.lan@microsoft.com, "K. Y. Srinivasan" <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>
Subject: Re: [PATCH v4 2/2] locking/pvqspinlock, hv: Enable PV qspinlock for
 Hyper-V
Message-ID: <20181010022536.GH11769@yi.y.sun>
References: <1538987374-51217-1-git-send-email-yi.y.sun@linux.intel.com>
 <1538987374-51217-3-git-send-email-yi.y.sun@linux.intel.com>
 <20181009105427.GA102322@gmail.com>
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On 18-10-09 12:54:27, Ingo Molnar wrote:
> 
> * Yi Sun <yi.y.sun@linux.intel.com> wrote:
> 
> > Follow PV spinlock mechanism to implement the callback functions
> > to allow the CPU idling and kicking operations on Hyper-V.
> 
> > +#if defined(CONFIG_SMP)
> > +	smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu;
> > +#endif
> 
> What's wrong with using the common pattern of:
> 
> 	#ifdef CONFIG_SMP
> 
> ?

There is no difference between "#ifdef" and "#if defined". I just copied
it from "hv_smp_prepare_boot_cpu()". Do you need me submit a fix patch
after this set is merged?

> 
> Thanks,
> 
> 	Ingo