From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu, 12 Jan 2017 12:01:11 +0000
From: Will Deacon <will.deacon@arm.com>
Subject: Re: [PATCH v29 4/9] arm64: kdump: implement machine_crash_shutdown()
Message-ID: <20170112120111.GE1771@arm.com>
References: <20161228043347.27358-1-takahiro.akashi@linaro.org>
 <20161228043605.27470-3-takahiro.akashi@linaro.org>
 <20170110113248.GC21598@arm.com>
 <20170111063626.GE20972@linaro.org>
 <20170111105405.GF12388@arm.com>
 <20170112042143.GF20972@linaro.org>
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To: AKASHI Takahiro <takahiro.akashi@linaro.org>, catalin.marinas@arm.com, james.morse@arm.com, geoff@infradead.org, bauerman@linux.vnet.ibm.com, dyoung@redhat.com, mark.rutland@arm.com, kexec@lists.infradead.org, linux-arm-kernel@lists.infradead.org

On Thu, Jan 12, 2017 at 01:21:44PM +0900, AKASHI Takahiro wrote:
> On Wed, Jan 11, 2017 at 10:54:05AM +0000, Will Deacon wrote:
> > On Wed, Jan 11, 2017 at 03:36:28PM +0900, AKASHI Takahiro wrote:
> > > On Tue, Jan 10, 2017 at 11:32:48AM +0000, Will Deacon wrote:
> > > > On Wed, Dec 28, 2016 at 01:36:01PM +0900, AKASHI Takahiro wrote:
> > > > > @@ -22,6 +25,7 @@
> > > > >  extern const unsigned char arm64_relocate_new_kernel[];
> > > > >  extern const unsigned long arm64_relocate_new_kernel_size;
> > > > >  
> > > > > +static bool in_crash_kexec;
> > > > 
> > > > Do you actually need this bool? Why not call kexec_crash_loaded() instead?
> > > 
> > > The two have different meanings:
> > > "in_crash_kexec" indicates that kdump is taking place, while
> > > kexec_crash_loaded() tells us only whether crash dump kernel has been
> > > loaded or not.
> > > 
> > > It is crucial to distinguish them especially for machine_kexec()
> > > which can be called on normal kexec even if kdump has been set up.
> > 
> > Ah, I see. So how about just doing:
> > 
> >   if (kimage == kexec_crash_image)
> > 
> > in machine_kexec?
> 
> Yeah, it should work.
> Do you want to merge the following hunk,
> or expect that I will re-send the whole patch series
> (with other changes if any)?

Thanks, I'll fold it in and shout if I run into any problems. My plan is
to queue this for 4.11.

Will

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