tree: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git willy-maple head: 7e346d2845b4bd77663394f39fa70456e0084c86 commit: e40a951e09ed0e66dbd646f938df19c876915b9d [189/202] mm: Remove vma linked list. config: alpha-defconfig (attached as .config) compiler: alpha-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=e40a951e09ed0e66dbd646f938df19c876915b9d git remote add rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git git fetch --no-tags rcu willy-maple git checkout e40a951e09ed0e66dbd646f938df19c876915b9d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>
All warnings (new ones prefixed by >>):
mm/mmap.c:2366:5: warning: no previous prototype for 'do_mas_align_munmap'
[-Wmissing-prototypes]
2366 | int do_mas_align_munmap(struct ma_state *mas, struct vm_area_struct
*vma,
| ^~~~~~~~~~~~~~~~~~~
mm/mmap.c: In function '__do_sys_remap_file_pages':
>> mm/mmap.c:2830:18: warning: variable 'ma_lock' set but not used
>> [-Wunused-but-set-variable]
2830 | struct ma_state ma_lock;
| ^~~~~~~
vim +/ma_lock +2830 mm/mmap.c
2824
2825 struct mm_struct *mm = current->mm;
2826 struct vm_area_struct *vma;
2827 unsigned long populate = 0;
2828 unsigned long ret = -EINVAL;
2829 struct file *file;
> 2830 struct ma_state ma_lock;
2831 MA_STATE(mas, &mm->mm_mt, start, start);
2832
2833 pr_warn_once("%s (%d) uses deprecated remap_file_pages()
syscall. See Documentation/vm/remap_file_pages.rst.\n",
2834 current->comm, current->pid);
2835
2836 if (prot)
2837 return ret;
2838
2839 start = start & PAGE_MASK;
2840 size = size & PAGE_MASK;
2841 if (start + size <= start)
2842 return ret;
2843
2844 /* Does pgoff wrap? */
2845 if (pgoff + (size >> PAGE_SHIFT) < pgoff)
2846 return ret;
2847
2848 if (mmap_write_lock_killable(mm))
2849 return -EINTR;
2850
2851 mas_set(&mas, start);
2852 vma = mas_walk(&mas);
2853 ma_lock = mas;
2854
2855 if (!vma || !(vma->vm_flags & VM_SHARED))
2856 goto out;
2857
2858 if (!vma->vm_file)
2859 goto out;
2860
2861 if (start + size > vma->vm_end) {
2862 struct vm_area_struct *prev, *next;
2863
2864 prev = vma;
2865 mas_for_each(&mas, next, start + size) {
2866 /* hole between vmas ? */
2867 if (next->vm_start != prev->vm_end)
2868 goto out;
2869
2870 if (next->vm_file != vma->vm_file)
2871 goto out;
2872
2873 if (next->vm_flags != vma->vm_flags)
2874 goto out;
2875
2876 if (start + size <= next->vm_end)
2877 break;
2878
2879 prev = next;
2880 }
2881
2882 if (!next)
2883 goto out;
2884 }
2885
2886 prot |= vma->vm_flags & VM_READ ? PROT_READ : 0;
2887 prot |= vma->vm_flags & VM_WRITE ? PROT_WRITE : 0;
2888 prot |= vma->vm_flags & VM_EXEC ? PROT_EXEC : 0;
2889
2890 flags &= MAP_NONBLOCK;
2891 flags |= MAP_SHARED | MAP_FIXED | MAP_POPULATE;
2892
2893 file = get_file(vma->vm_file);
2894 ret = do_mmap(vma->vm_file, start, size,
2895 prot, flags, pgoff, &populate, NULL);
2896 fput(file);
2897 out:
2898 mmap_write_unlock(mm);
2899 if (populate)
2900 mm_populate(ret, populate);
2901 if (!IS_ERR_VALUE(ret))
2902 ret = 0;
2903 return ret;
2904 }
2905
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
.config.gz
Description: application/gzip
