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Message-ID: <202409190205.YJ5gtx3T-lkp@intel.com>
Date: Thu, 19 Sep 2024 02:57:21 +0800
From: kernel test robot <lkp@...el.com>
To: Anshuman Khandual <anshuman.khandual@....com>, linux-mm@...ck.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
Anshuman Khandual <anshuman.khandual@....com>,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Memory Management List <linux-mm@...ck.org>,
David Hildenbrand <david@...hat.com>,
Ryan Roberts <ryan.roberts@....com>,
"Mike Rapoport (IBM)" <rppt@...nel.org>,
Arnd Bergmann <arnd@...db.de>, x86@...nel.org,
linux-m68k@...ts.linux-m68k.org, linux-fsdevel@...r.kernel.org,
kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
linux-perf-users@...r.kernel.org,
Dimitri Sivanich <dimitri.sivanich@....com>,
Muchun Song <muchun.song@...ux.dev>,
Andrey Ryabinin <ryabinin.a.a@...il.com>,
Miaohe Lin <linmiaohe@...wei.com>,
Naoya Horiguchi <nao.horiguchi@...il.com>,
Pasha Tatashin <pasha.tatashin@...een.com>,
Dennis Zhou <dennis@...nel.org>, Tejun Heo <tj@...nel.org>,
Christoph Lameter <cl@...ux-foundation.org>,
Uladzislau Rezki <urezki@...il.com>,
Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH V2 4/7] mm: Use pmdp_get() for accessing PMD entries
Hi Anshuman,
kernel test robot noticed the following build errors:
[auto build test ERROR on char-misc/char-misc-testing]
[also build test ERROR on char-misc/char-misc-next char-misc/char-misc-linus brauner-vfs/vfs.all dennis-percpu/for-next linus/master v6.11]
[cannot apply to akpm-mm/mm-everything next-20240918]
[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/Anshuman-Khandual/m68k-mm-Change-pmd_val/20240917-153331
base: char-misc/char-misc-testing
patch link: https://lore.kernel.org/r/20240917073117.1531207-5-anshuman.khandual%40arm.com
patch subject: [PATCH V2 4/7] mm: Use pmdp_get() for accessing PMD entries
config: um-allnoconfig (https://download.01.org/0day-ci/archive/20240919/202409190205.YJ5gtx3T-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240919/202409190205.YJ5gtx3T-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/202409190205.YJ5gtx3T-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from mm/pgtable-generic.c:10:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:12:
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:14:
In file included from arch/um/include/asm/io.h:24:
include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
548 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
561 | 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/pgtable-generic.c:10:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:12:
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:14:
In file included from arch/um/include/asm/io.h:24:
include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
574 | 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/pgtable-generic.c:10:
In file included from include/linux/pagemap.h:11:
In file included from include/linux/highmem.h:12:
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:14:
In file included from arch/um/include/asm/io.h:24:
include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
585 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:693:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
693 | readsb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:701:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
701 | readsw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:709:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
709 | readsl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:718:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
718 | writesb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:727:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
727 | writesw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
736 | writesl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
>> mm/pgtable-generic.c:54:2: error: cannot take the address of an rvalue of type 'pgd_t'
54 | pmd_ERROR(pmdp_get(pmd));
| ^~~~~~~~~~~~~~~~~~~~~~~~
include/asm-generic/pgtable-nopmd.h:36:28: note: expanded from macro 'pmd_ERROR'
36 | #define pmd_ERROR(pmd) (pud_ERROR((pmd).pud))
| ^~~~~~~~~~~~~~~~~~~~
include/asm-generic/pgtable-nopud.h:32:28: note: expanded from macro 'pud_ERROR'
32 | #define pud_ERROR(pud) (p4d_ERROR((pud).p4d))
| ^~~~~~~~~~~~~~~~~~~~
include/asm-generic/pgtable-nop4d.h:25:28: note: expanded from macro 'p4d_ERROR'
25 | #define p4d_ERROR(p4d) (pgd_ERROR((p4d).pgd))
| ^~~~~~~~~~~~~~~~~~~~
arch/um/include/asm/pgtable-2level.h:31:67: note: expanded from macro 'pgd_ERROR'
31 | printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
32 | pgd_val(e))
| ~~~~~~~~~~~
include/linux/printk.h:465:60: note: expanded from macro 'printk'
465 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
include/linux/printk.h:437:19: note: expanded from macro 'printk_index_wrap'
437 | _p_func(_fmt, ##__VA_ARGS__); \
| ^~~~~~~~~~~
12 warnings and 1 error generated.
vim +/pgd_t +54 mm/pgtable-generic.c
46
47 /*
48 * Note that the pmd variant below can't be stub'ed out just as for p4d/pud
49 * above. pmd folding is special and typically pmd_* macros refer to upper
50 * level even when folded
51 */
52 void pmd_clear_bad(pmd_t *pmd)
53 {
> 54 pmd_ERROR(pmdp_get(pmd));
55 pmd_clear(pmd);
56 }
57
--
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