Re: [PATCH v2 bpf-next 03/20] bpf: Plumb get_unmapped_area() callback into bpf_map_ops

[kernel test robot <lkp@intel.com>]

Hi Alexei,

kernel test robot noticed the following build errors:

[auto build test ERROR on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Alexei-Starovoitov/bpf-Allow-kfuncs-return-void/20240209-120941
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
patch link:    https://lore.kernel.org/r/20240209040608.98927-4-alexei.starovoitov%40gmail.com
patch subject: [PATCH v2 bpf-next 03/20] bpf: Plumb get_unmapped_area() callback into bpf_map_ops
config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20240210/202402101653.QJBLJLnM-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240210/202402101653.QJBLJLnM-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/202402101653.QJBLJLnM-lkp@intel.com/

All errors (new ones prefixed by >>):

   kernel/bpf/syscall.c: In function 'bpf_get_unmapped_area':
>> kernel/bpf/syscall.c:948:27: error: 'struct mm_struct' has no member named 'get_unmapped_area'
     948 |         return current->mm->get_unmapped_area(filp, addr, len, pgoff, flags);
         |                           ^~
   kernel/bpf/syscall.c:949:1: warning: control reaches end of non-void function [-Wreturn-type]
     949 | }
         | ^


vim +948 kernel/bpf/syscall.c

   939	
   940	static unsigned long bpf_get_unmapped_area(struct file *filp, unsigned long addr,
   941						   unsigned long len, unsigned long pgoff,
   942						   unsigned long flags)
   943	{
   944		struct bpf_map *map = filp->private_data;
   945	
   946		if (map->ops->map_get_unmapped_area)
   947			return map->ops->map_get_unmapped_area(filp, addr, len, pgoff, flags);
 > 948		return current->mm->get_unmapped_area(filp, addr, len, pgoff, flags);
   949	}
   950	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki