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Date: Thu, 23 Feb 2023 15:14:39 +0100
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Cc: kernel test robot <lkp@intel.com>,
	Dave Hansen <dave.hansen@linux.intel.com>, llvm@lists.linux.dev,
	oe-kbuild-all@lists.linux.dev,
	GNU/Weeb Mailing List <gwml@vger.gnuweeb.org>,
	Sasha Levin <sashal@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [ammarfaizi2-block:stable/linux-stable-rc/queue/5.4 15/15]
 kernel/bpf/core.c:1570:3: error: implicit declaration of function
 'barrier_nospec'
Message-ID: <Y/d0zwDQmCJ33SFu@kroah.com>
References: <202302232136.AWzwjCvb-lkp@intel.com>
 <Y/duzncICkBE4wSe@biznet-home.integral.gnuweeb.org>
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On Thu, Feb 23, 2023 at 08:49:02PM +0700, Ammar Faizi wrote:
> On Thu, Feb 23, 2023 at 09:31:08PM +0800, kernel test robot wrote:
> > tree:   https://github.com/ammarfaizi2/linux-block stable/linux-stable-rc/queue/5.4
> > commit: 3bb990ea37595b41a1f06a551e5dd35372ea404a [15/15] uaccess: Add speculation barrier to copy_from_user()
> ...
> > If you fix the issue, kindly add following tag where applicable
> > | Reported-by: kernel test robot <lkp@intel.com>
> > | Link: https://lore.kernel.org/oe-kbuild-all/202302232136.AWzwjCvb-lkp@intel.com/
> > 
> > All errors (new ones prefixed by >>):
> > 
> > >> kernel/bpf/core.c:1570:3: error: implicit declaration of function 'barrier_nospec' [-Werror,-Wimplicit-function-declaration]
> >                    barrier_nospec();
> >                    ^
> >    1 error generated.
> 
> It's missing #include <linux/nospec.h>. The fix for this is:
> 
> Upstream f3dd0c53370e70c0f9b7e931bbec12916f3bb8cc ("bpf: add missing header file include")
> 
> That one needs to get backported too. Or just fold that in to maintain
> the bisectability (for stable kernels).

Thanks, now queued up, I missed that follow-on patch.

greg k-h