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Date: Sat, 7 Oct 2017 12:06:59 +0200
From: gregkh <gregkh@linuxfoundation.org>
To: Laura Abbott <labbott@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>, Olof Johansson <olof@lixom.net>,
        Kernel Build Reports Mailman List
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        Mark Rutland <mark.rutland@arm.com>,
        Olof's autobuilder <build@lixom.net>
Subject: Re: stable-rc build: 0 warnings 1 failures
 (stable-rc/v4.9.53-105-g0e59436)
Message-ID: <20171007100659.GA25029@kroah.com>
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On Fri, Oct 06, 2017 at 08:14:40AM -0700, Laura Abbott wrote:
> On 10/06/2017 04:27 AM, Arnd Bergmann wrote:
> > On Fri, Oct 6, 2017 at 12:03 PM, Olof's autobuilder <build@lixom.net> wrote:
> >> Here are the build results from automated periodic testing.
> >>
> >> The tree being built was stable-rc, found at:
> >>
> >> https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable-rc.git/
> >>
> >> Topmost commit:
> >>
> >> 0e59436 Linux 4.9.54-rc1
> > 
> >>
> >>         arm64.allmodconfig:
> >> /work/build/batch/arch/arm64/mm/kasan_init.c:156:95: error: implicit declaration of function 'lm_alias'; did you mean 'mm_alloc'? [-Werror=implicit-function-declaration]
> > 
> > Caused by
> > 
> > e773d137b255 ("arm64: kasan: avoid bad virt_to_pfn()")
> > (backported from b0de0ccc8b9ed)
> > 
> > Presumably requires a backport of
> > 
> > 568c5fe5a54f ("mm: Introduce lm_alias")
> > 
> > Mark or Laura, can you confirm that this is the correct fix?
> > I see additional uses of lm_alias in mainline, but only this one
> > backported to stable, not sure if only this one is required there,
> > or we want the others as well.
> > 
> >        Arnd
> > 
> 
> 
> I don't think backporting lm_alias is the correct fix. That was
> introduced as part of DEBUG_VIRTUAL for arm64 which isn't present
> at all for 4.9. If DEBUG_VIRTUAL isn't present, there should be
> no need for this fix since it's handled by existing code. I
> think the patch should be dropped assuming there isn't another
> issue with kasan.

I've just dropped it now, sorry for this.

thanks,

greg k-h