Re: [akpm-mm:mm-nonmm-unstable 22/23] lib/group_cpus.c:352:16: error: array initializer must be an initializer list

[Nathan Chancellor <nathan@kernel.org>]

On Sun, Jan 14, 2024 at 01:40:11AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-nonmm-unstable
> head:   3d69c575710800c9a4a58e94c157697310e32027
> commit: a868f9c8816cb72f983d1ff940b0938737fe8ee7 [22/23] lib/group_cpus: fix initialization section in group_cpus_evenly()
> config: i386-randconfig-011-20240113 (https://download.01.org/0day-ci/archive/20240114/202401140117.pwAcsXAT-lkp@intel.com/config)
> compiler: ClangBuiltLinux clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240114/202401140117.pwAcsXAT-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202401140117.pwAcsXAT-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
> >> lib/group_cpus.c:352:16: error: array initializer must be an initializer list
>      352 |         cpumask_var_t npresmsk __free(free_cpumask_var) = NULL;
>          |                       ^
>    1 error generated.

Not a compiler specific error, as evidenced by the GCC report:

https://lore.kernel.org/202401160231.mSAgDn9b-lkp@intel.com/

Neither configuration has CONFIG_CPUMASK_OFFSTACK, which is not going to
be enabled for most configurations, as it is not user selectable without
CONFIG_DEBUG_PER_CPU_MAPS and there are only a few conditions where it
is force selected. In other words, I suspect this error is going to be
quite widespread if it hits -next. I can still reproduce it at the
current mm-nonmm-unstable, commit 08be2d243fb7 ("lib/sort: Optimize
heapsort with double-pop variation").

Cheers,
Nathan