12:13 p.m.
Hi Peter,
FYI, the error/warning still remains.
tree: https://android.googlesource.com/kernel/common android12-5.10
head: b6e60f0673ab010bb9d00f9473bc2398365a8c43
commit: 59caf93f36aed4b7c5960672376b966e3f5b2bf1 [7509/9146] BACKPORT: FROMGIT: hugetlb:
pass vma into huge_pte_alloc() and huge_pmd_share()
config: arm64-randconfig-c003-20210518 (attached as .config)
compiler: aarch64-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
git remote add android-common https://android.googlesource.com/kernel/common
git fetch --no-tags android-common android12-5.10
git checkout 59caf93f36aed4b7c5960672376b966e3f5b2bf1
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
> mm/hugetlb.c:5458:8: error: conflicting types for
'huge_pmd_share'
5458 | pte_t *huge_pmd_share(struct mm_struct *mm,
struct vm_area_struct vma,
| ^~~~~~~~~~~~~~
In file included from mm/hugetlb.c:39:
include/linux/hugetlb.h:155:8: note: previous declaration of 'huge_pmd_share'
was here
155 | pte_t *huge_pmd_share(struct mm_struct *mm, struct vm_area_struct *vma,
| ^~~~~~~~~~~~~~
vim +/huge_pmd_share +5458 mm/hugetlb.c
5425
5426 /*
5427 * unmap huge page backed by shared pte.
5428 *
5429 * Hugetlb pte page is ref counted at the time of mapping. If pte is shared
5430 * indicated by page_count > 1, unmap is achieved by clearing pud and
5431 * decrementing the ref count. If count == 1, the pte page is not shared.
5432 *
5433 * Called with page table lock held and i_mmap_rwsem held in write mode.
5434 *
5435 * returns: 1 successfully unmapped a shared pte page
5436 * 0 the underlying pte page is not shared, or it is the last user
5437 */
5438 int huge_pmd_unshare(struct mm_struct *mm, struct vm_area_struct *vma,
5439 unsigned long *addr, pte_t *ptep)
5440 {
5441 pgd_t *pgd = pgd_offset(mm, *addr);
5442 p4d_t *p4d = p4d_offset(pgd, *addr);
5443 pud_t *pud = pud_offset(p4d, *addr);
5444
5445 i_mmap_assert_write_locked(vma->vm_file->f_mapping);
5446 BUG_ON(page_count(virt_to_page(ptep)) == 0);
5447 if (page_count(virt_to_page(ptep)) == 1)
5448 return 0;
5449
5450 pud_clear(pud);
5451 put_page(virt_to_page(ptep));
5452 mm_dec_nr_pmds(mm);
5453 *addr = ALIGN(*addr, HPAGE_SIZE * PTRS_PER_PTE) - HPAGE_SIZE;
5454 return 1;
5455 }
5456 #define want_pmd_share() (1)
5457 #else /* !CONFIG_ARCH_WANT_HUGE_PMD_SHARE */
5458 pte_t *huge_pmd_share(struct mm_struct *mm, struct
vm_area_struct vma,
5459 unsigned long addr, pud_t *pud)
5460 {
5461 return NULL;
5462 }
5463
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org