linux-kernel - Re: Linux 3.8.9 Build Failure in user

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Message-ID: <20130429205628.GA20607@austin.hallyn.com>
Date:	Mon, 29 Apr 2013 15:56:28 -0500
From:	"Serge E. Hallyn" <serge@...lyn.com>
To:	shea@...alevy.com
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Linux 3.8.9 Build Failure in user_namespace.c

Quoting shea@...alevy.com (shea@...alevy.com):
> Hi All,
> 
> I just hit the following error trying to build 3.8.9:
> 
> /nix/store/vkvwpn6f7iff6zqrq2d9z2a1945pcsza-linux-3.8.9-source/kernel/user_namespace.c:
> In function 'map_write':
> /nix/store/vkvwpn6f7iff6zqrq2d9z2a1945pcsza-linux-3.8.9-source/kernel/user_namespace.c:582:2:
> error: implicit declaration of function 'file_ns_capable'
> [-Werror=implicit-function-declaration]
> cc1: some warnings being treated as errors
> 
> Below is my .config, below that the build log.

I'm looking at 3.9.  file_ns_capable() is declared in capability.h, which gets
included into user_namespace.c through cred.h.  I did also try building with
CONFIG_SECURITY=n and CONFIG_USER_NS=y as you have it, but build succeeded,
as I would expect given how it is included.

Do you have any custom patches applied by chance?

-serge
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