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Date: Tue, 31 Mar 2015 19:18:34 -0700
From: Guenter Roeck <linux@roeck-us.net>
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To: Michael Ellerman <mpe@ellerman.id.au>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: Stephen Rothwell <sfr@canb.auug.org.au>, linux-next@vger.kernel.org,
        linux-kernel@vger.kernel.org, Tony Lindgren <tony@atomide.com>,
        Felipe Balbi <balbi@ti.com>,
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        Russell King <rmk+kernel@arm.linux.org.uk>,
        Arnd Bergmann <arnd@arndb.de>, Lad@roeck-us.net,
        Prabhakar <prabhakar.csengg@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>, Daniel Mack <daniel@zonque.org>,
        Mikko Perttunen <mperttunen@nvidia.com>,
        Thierry Reding <treding@nvidia.com>
Subject: Re: linux-next: Tree for Mar 31 (build failures and culprits)
References: <20150401000221.21961ecd@canb.auug.org.au>	 <20150331161640.GA16540@roeck-us.net> <20150331230749.GA6564@kroah.com> <1427844281.4256.3.camel@ellerman.id.au>
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On 03/31/2015 04:24 PM, Michael Ellerman wrote:
> On Wed, 2015-04-01 at 01:07 +0200, Greg Kroah-Hartman wrote:
>> On Tue, Mar 31, 2015 at 09:16:40AM -0700, Guenter Roeck wrote:
>>> alpha:allmodconfig
>>> mips:allmodconfig
>>>
>>> samples/kdbus/kdbus-workers.c: In function ‘prime_new’:
>>> samples/kdbus/kdbus-workers.c:930:18: error: ‘__NR_memfd_create’ undeclared
>>> (first use in this function)
>>>    p->fd = syscall(__NR_memfd_create, "prime-area", MFD_CLOEXEC);
>>>
>>> Looks like the kdbus example never worked for the affected architectures.
>>> I don't build allmodconfig for all architectures, so other architectures
>>> may be affected as well.
>>
>> You need 3.17 kernel headers to have memfd_create, not much the kdbus
>> test code can do about that.  You might want to update the kernel
>> headers for these build boxes.
>
> Or just 'make headers_install' before building the samples should do it.
>

Sure, that works so well in a cross build environment.

Guenter