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Date: Fri, 21 Jul 2023 10:30:57 +0800
From: "zhangpeng (AS)" <zhangpeng362@...wei.com>
To: kernel test robot <lkp@...el.com>, <linux-mm@...ck.org>,
<linux-kernel@...r.kernel.org>, <willy@...radead.org>
CC: <llvm@...ts.linux.dev>, <oe-kbuild-all@...ts.linux.dev>,
<hch@...radead.org>, <sidhartha.kumar@...cle.com>,
<akpm@...ux-foundation.org>, <wangkefeng.wang@...wei.com>,
<sunnanyong@...wei.com>
Subject: Re: [PATCH v3 09/10] mm/page_io: convert count_swpout_vm_event() to
take in a folio
On 2023/7/21 9:31, kernel test robot wrote:
> Hi Peng,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on akpm-mm/mm-everything]
> [also build test ERROR on axboe-block/for-next linus/master v6.5-rc2 next-20230720]
> [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/Peng-Zhang/mm-page_io-remove-unneeded-ClearPageUptodate/20230720-210515
> base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link: https://lore.kernel.org/r/20230720130147.4071649-10-zhangpeng362%40huawei.com
> patch subject: [PATCH v3 09/10] mm/page_io: convert count_swpout_vm_event() to take in a folio
> config: um-randconfig-r003-20230720 (https://download.01.org/0day-ci/archive/20230721/202307210951.NCdscoSS-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
> reproduce: (https://download.01.org/0day-ci/archive/20230721/202307210951.NCdscoSS-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@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202307210951.NCdscoSS-lkp@intel.com/
>
> 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:211:18: error: use of undeclared identifier 'THP_SWPOUT'; did you mean 'PSWPOUT'?
> 211 | count_vm_event(THP_SWPOUT);
> | ^~~~~~~~~~
> | PSWPOUT
> include/linux/vm_event_item.h:32:47: note: 'PSWPOUT' declared here
> 32 | enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
> | ^
> 12 warnings and 1 error generated.
I will fix it in the next version. Thanks.
>
> vim +211 mm/page_io.c
>
> 2f772e6cadf8ad Seth Jennings 2013-04-29 207
> c40c44eb86eb74 ZhangPeng 2023-07-20 208 static inline void count_swpout_vm_event(struct folio *folio)
> 225311a46411c3 Huang Ying 2017-09-06 209 {
> c40c44eb86eb74 ZhangPeng 2023-07-20 210 if (unlikely(folio_test_pmd_mappable(folio)))
> 225311a46411c3 Huang Ying 2017-09-06 @211 count_vm_event(THP_SWPOUT);
> c40c44eb86eb74 ZhangPeng 2023-07-20 212 count_vm_events(PSWPOUT, folio_nr_pages(folio));
> 225311a46411c3 Huang Ying 2017-09-06 213 }
> 225311a46411c3 Huang Ying 2017-09-06 214
>
--
Best Regards,
Peng
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