Re: Linux 3.8.9 Build Failure in user_namespace.c

[Serge E. Hallyn]

Quoting shea@xxxxxxxxxxxx (shea@xxxxxxxxxxxx):
> 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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