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Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Sep 09, 2025 at 11:26:50AM +0800, kernel test robot wrote: > Hi Lorenzo, > > kernel test robot noticed the following build warnings: > > [auto build test WARNING on akpm-mm/mm-everything] > [cannot apply to brauner-vfs/vfs.all char-misc/char-misc-testing char-misc/char-misc-next char-misc/char-misc-linus s390/features lwn/docs-next linus/master v6.17-rc5 next-20250908] > [If your patch is applied to the wrong git tree, kindly drop us a note. > And when submitting patch, we suggest to use '--base' as documented in > https://git-scm.com/docs/git-format-patch#_base_tree_information] > > url: https://github.com/intel-lab-lkp/linux/commits/Lorenzo-Stoakes/mm-shmem-update-shmem-to-use-mmap_prepare/20250908-191516 > base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything > patch link: https://lore.kernel.org/r/d9e9407d2ee4119c83a704a80763e5344afb42f5.1757329751.git.lorenzo.stoakes%40oracle.com > patch subject: [PATCH 12/16] mm: update resctl to use mmap_prepare, mmap_complete, mmap_abort > config: i386-buildonly-randconfig-001-20250909 (https://download.01.org/0day-ci/archive/20250909/202509091127.USj6agt3-lkp@intel.com/config) > compiler: gcc-13 (Debian 13.3.0-16) 13.3.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250909/202509091127.USj6agt3-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 > | Closes: https://lore.kernel.org/oe-kbuild-all/202509091127.USj6agt3-lkp@intel.com/ > > All warnings (new ones prefixed by >>): > > In file included from include/linux/mm.h:1096, > from include/linux/mman.h:6, > from fs/resctrl/pseudo_lock.c:19: > include/linux/huge_mm.h: In function 'split_huge_page_to_list_to_order': > include/linux/huge_mm.h:591:23: warning: unused variable 'folio' [-Wunused-variable] > 591 | struct folio *folio = page_folio(page); > | ^~~~~ > include/linux/huge_mm.h: In function 'split_huge_page': > include/linux/huge_mm.h:598:23: warning: unused variable 'folio' [-Wunused-variable] > 598 | struct folio *folio = page_folio(page); > | ^~~~~ (These are nothing to do with the series of course.) > fs/resctrl/pseudo_lock.c: In function 'pseudo_lock_dev_mmap_complete': > >> fs/resctrl/pseudo_lock.c:1006:23: warning: variable 'psize' set but not used [-Wunused-but-set-variable] > 1006 | unsigned long psize; > | ^~~~~ > Ack, will refactor! > > vim +/psize +1006 fs/resctrl/pseudo_lock.c > > 7168ae330e8105 James Morse 2025-05-15 997 > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 998 static int pseudo_lock_dev_mmap_complete(struct file *filp, struct vm_area_struct *vma, > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 999 const void *context) > 7168ae330e8105 James Morse 2025-05-15 1000 { > 7168ae330e8105 James Morse 2025-05-15 1001 unsigned long vsize = vma->vm_end - vma->vm_start; > 7168ae330e8105 James Morse 2025-05-15 1002 unsigned long off = vma->vm_pgoff << PAGE_SHIFT; > 7168ae330e8105 James Morse 2025-05-15 1003 struct pseudo_lock_region *plr; > 7168ae330e8105 James Morse 2025-05-15 1004 struct rdtgroup *rdtgrp; > 7168ae330e8105 James Morse 2025-05-15 1005 unsigned long physical; > 7168ae330e8105 James Morse 2025-05-15 @1006 unsigned long psize; > 7168ae330e8105 James Morse 2025-05-15 1007 > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1008 rdtgrp = filp->private_data; > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1009 plr = rdtgrp->plr; > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1010 > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1011 physical = __pa(plr->kmem) >> PAGE_SHIFT; > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1012 psize = plr->size - off; > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1013 > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1014 memset(plr->kmem + off, 0, vsize); > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1015 > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1016 if (remap_pfn_range_complete(vma, vma->vm_start, physical + vma->vm_pgoff, > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1017 vsize, vma->vm_page_prot)) { > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1018 mutex_unlock(&rdtgroup_mutex); > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1019 return -EAGAIN; > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1020 } > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1021 > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1022 mutex_unlock(&rdtgroup_mutex); > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1023 return 0; > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1024 } > 5ef190013e9b31 Lorenzo Stoakes 2025-09-08 1025 > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki Cheers, Lorenzo