Re: [rdma:k.o/for-4.11 15/22] include/linux/compiler.h:518:38: error: call to '__compiletime_assert_126' declared with attribute error: BUILD_BUG_ON failed: !is_power_of_2(RXE_BUF_PER_MAP)

[Bart Van Assche <Bart.VanAssche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>]

On Thu, 2017-01-12 at 16:50 +0800, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma.git k.o/for-4.11
> head:   c5540a0195ec65e2ab9fcc4bde958db2cc66550c
> commit: 43553b47c3124e7f4a9f115cff9db513b35a5e0a [15/22] IB/rxe: Issue warnings once
> config: i386-randconfig-c0-01121610 (attached as .config)
> compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
> reproduce:
>         git checkout 43553b47c3124e7f4a9f115cff9db513b35a5e0a
>         # save the attached .config to linux build tree
>         make ARCH=i386 
> 
> All error/warnings (new ones prefixed by >>):
> 
>    In file included from include/uapi/linux/stddef.h:1:0,
>                     from include/linux/stddef.h:4,
>                     from include/uapi/linux/posix_types.h:4,
>                     from include/uapi/linux/types.h:13,
>                     from include/linux/types.h:5,
>                     from include/linux/list.h:4,
>                     from include/linux/module.h:9,
>                     from drivers/infiniband/sw/rxe/rxe.h:42,
>                     from drivers/infiniband/sw/rxe/rxe_mr.c:34:
>    drivers/infiniband/sw/rxe/rxe_mr.c: In function 'rxe_mem_alloc.isra.3':
> > > include/linux/compiler.h:518:38: error: call to '__compiletime_assert_126' declared with attribute error: BUILD_BUG_ON failed: !is_power_of_2(RXE_BUF_PER_MAP)
> 
>      _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
>                                          ^
>    include/linux/compiler.h:501:4: note: in definition of macro '__compiletime_assert'
>        prefix ## suffix();    \
>        ^
>    include/linux/compiler.h:518:2: note: in expansion of macro '_compiletime_assert'
>      _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
>      ^
>    include/linux/bug.h:54:37: note: in expansion of macro 'compiletime_assert'
>     #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
>                                         ^
>    include/linux/bug.h:78:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
>      BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
>      ^
> > > drivers/infiniband/sw/rxe/rxe_mr.c:126:2: note: in expansion of macro 'BUILD_BUG_ON'
> 
>      BUILD_BUG_ON(!is_power_of_2(RXE_BUF_PER_MAP));
>      ^


Hello Wu,

make ARCH=i386 M=drivers/infiniband/sw/rxe succeeds on my development system
with the .config that was attached to your e-mail and with gcc 6.2.1. Do you
think the above indicate a bug in the kbuild test robot infrastructure?

Thanks,

Bart.--
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