Hi Vern, kernel test robot noticed the following build errors: [auto build test ERROR on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Vern-Hao/mm-memcg-add-THP-swap-out-info-for-anonymous-reclaim/20230914-005121 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230913164938.16918-1-vernhao%40tencent.com patch subject: [PATCH v3] mm: memcg: add THP swap out info for anonymous reclaim config: um-allnoconfig (https://download.01.org/0day-ci/archive/20230914/202309140314.DrcFvlZS-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230914/202309140314.DrcFvlZS-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202309140314.DrcFvlZS-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from mm/page_io.c:15: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 547 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from mm/page_io.c:15: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from mm/page_io.c:15: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from arch/um/include/asm/hardirq.h:5: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/um/include/asm/io.h:24: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 584 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 692 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 700 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 708 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 717 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 726 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 735 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ >> mm/page_io.c:298:45: error: use of undeclared identifier 'p' 298 | count_swpout_vm_event(page_folio(sio->bvec[p].bv_page)); | ^ 12 warnings and 1 error generated. vim +/p +298 mm/page_io.c 290 291 static void swap_writepage_fs(struct page *page, struct writeback_control *wbc) 292 { 293 struct swap_iocb *sio = NULL; 294 struct swap_info_struct *sis = page_swap_info(page); 295 struct file *swap_file = sis->swap_file; 296 loff_t pos = page_file_offset(page); 297 > 298 count_swpout_vm_event(page_folio(sio->bvec[p].bv_page)); 299 set_page_writeback(page); 300 unlock_page(page); 301 if (wbc->swap_plug) 302 sio = *wbc->swap_plug; 303 if (sio) { 304 if (sio->iocb.ki_filp != swap_file || 305 sio->iocb.ki_pos + sio->len != pos) { 306 swap_write_unplug(sio); 307 sio = NULL; 308 } 309 } 310 if (!sio) { 311 sio = mempool_alloc(sio_pool, GFP_NOIO); 312 init_sync_kiocb(&sio->iocb, swap_file); 313 sio->iocb.ki_complete = sio_write_complete; 314 sio->iocb.ki_pos = pos; 315 sio->pages = 0; 316 sio->len = 0; 317 } 318 bvec_set_page(&sio->bvec[sio->pages], page, thp_size(page), 0); 319 sio->len += thp_size(page); 320 sio->pages += 1; 321 if (sio->pages == ARRAY_SIZE(sio->bvec) || !wbc->swap_plug) { 322 swap_write_unplug(sio); 323 sio = NULL; 324 } 325 if (wbc->swap_plug) 326 *wbc->swap_plug = sio; 327 } 328 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
