Quoting Guenter Roeck (2013-09-13 12:35:35)
> On Fri, Sep 13, 2013 at 03:52:43PM +0200, Geert Uytterhoeven wrote:
> > On Fri, Sep 13, 2013 at 3:33 PM, Guenter Roeck <li...@roeck-us.net> wrote:
> > > fs/btrfs/ioctl.c: In function 'btrfs_ioctl_file_extent_same':
> > > fs/btrfs/ioctl.c:2802:3: error: implicit declaration of function 
> > > '__put_user_unaligned' [-Werror=implicit-function-declaration]
> > > cc1: some warnings being treated as errors
> > > make[2]: *** [fs/btrfs/ioctl.o] Error 1
> > > make[2]: *** Waiting for unfinished jobs....
> > >
> > > Seen with alpha:allmodconfig, arm:allmodconfig, m68k:allmodconfig, and
> > > xtensa:allmodconfig.
> > 
> > Known issue, cfr. my early warning 10 days ago:
> > 
> > "Btrfs is the first user of __put_user_unaligned() outside the compat code,
> > hence now all 32-bit architectures should make sure to implement this, too."
> > 
> > http://marc.info/?l=linux-arch&m=137820065929216&w=2
> > 
> > and today's thread https://lkml.org/lkml/2013/9/12/814
> > 
> 
> It doesn't seem right that a patch breaks the build for several platforms, and
> the problem is then blamed on the platform code instead of the code that is
> introducing the problem.
> 
> Maybe we should add BROKEN to the btrfs dependencies for the affected 
> platforms.
> After all, it _is_ broken.

I'm happy to fix this with a bigger put of the info struct, just
let me know the preferred arch-happy solution.

-chris
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