From: kernel test robot <lkp@intel.com>
To: oe-kbuild@lists.linux.dev
Cc: lkp@intel.com
Subject: mm/vmscan.c:4080:29: sparse: sparse: cast to non-scalar
Date: Thu, 19 Jan 2023 16:09:59 +0800 [thread overview]
Message-ID: <202301191605.XaYMfTFT-lkp@intel.com> (raw)
::::::
:::::: Manual check reason: "low confidence static check warning: mm/vmscan.c:4080:29: sparse: sparse: cast to non-scalar"
::::::
BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
TO: Yu Zhao <yuzhao@google.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 7287904c8771b77b9504f53623bb477065c19a58
commit: bd74fdaea146029e4fa12c6de89adbe0779348a9 mm: multi-gen LRU: support page table walks
date: 4 months ago
:::::: branch date: 9 hours ago
:::::: commit date: 4 months ago
config: alpha-randconfig-s051-20230118 (https://download.01.org/0day-ci/archive/20230119/202301191605.XaYMfTFT-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 12.1.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bd74fdaea146029e4fa12c6de89adbe0779348a9
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout bd74fdaea146029e4fa12c6de89adbe0779348a9
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=alpha olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=alpha SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>)
>> mm/vmscan.c:4080:29: sparse: sparse: cast to non-scalar
>> mm/vmscan.c:4080:29: sparse: sparse: cast from non-scalar
mm/vmscan.c: note: in included file (through include/linux/rbtree.h, include/linux/mm_types.h, include/linux/mmzone.h, ...):
include/linux/rcupdate.h:737:9: sparse: sparse: context imbalance in 'lru_gen_look_around' - different lock contexts for basic block
mm/vmscan.c: note: in included file (through include/linux/swap.h):
include/linux/memcontrol.h:1663:39: sparse: sparse: context imbalance in 'check_move_unevictable_folios' - unexpected unlock
vim +4080 mm/vmscan.c
bd74fdaea14602 Yu Zhao 2022-09-18 4065
bd74fdaea14602 Yu Zhao 2022-09-18 4066 static int walk_pud_range(p4d_t *p4d, unsigned long start, unsigned long end,
bd74fdaea14602 Yu Zhao 2022-09-18 4067 struct mm_walk *args)
bd74fdaea14602 Yu Zhao 2022-09-18 4068 {
bd74fdaea14602 Yu Zhao 2022-09-18 4069 int i;
bd74fdaea14602 Yu Zhao 2022-09-18 4070 pud_t *pud;
bd74fdaea14602 Yu Zhao 2022-09-18 4071 unsigned long addr;
bd74fdaea14602 Yu Zhao 2022-09-18 4072 unsigned long next;
bd74fdaea14602 Yu Zhao 2022-09-18 4073 struct lru_gen_mm_walk *walk = args->private;
bd74fdaea14602 Yu Zhao 2022-09-18 4074
bd74fdaea14602 Yu Zhao 2022-09-18 4075 VM_WARN_ON_ONCE(p4d_leaf(*p4d));
bd74fdaea14602 Yu Zhao 2022-09-18 4076
bd74fdaea14602 Yu Zhao 2022-09-18 4077 pud = pud_offset(p4d, start & P4D_MASK);
bd74fdaea14602 Yu Zhao 2022-09-18 4078 restart:
bd74fdaea14602 Yu Zhao 2022-09-18 4079 for (i = pud_index(start), addr = start; addr != end; i++, addr = next) {
bd74fdaea14602 Yu Zhao 2022-09-18 @4080 pud_t val = READ_ONCE(pud[i]);
bd74fdaea14602 Yu Zhao 2022-09-18 4081
bd74fdaea14602 Yu Zhao 2022-09-18 4082 next = pud_addr_end(addr, end);
bd74fdaea14602 Yu Zhao 2022-09-18 4083
bd74fdaea14602 Yu Zhao 2022-09-18 4084 if (!pud_present(val) || WARN_ON_ONCE(pud_leaf(val)))
bd74fdaea14602 Yu Zhao 2022-09-18 4085 continue;
bd74fdaea14602 Yu Zhao 2022-09-18 4086
bd74fdaea14602 Yu Zhao 2022-09-18 4087 walk_pmd_range(&val, addr, next, args);
bd74fdaea14602 Yu Zhao 2022-09-18 4088
bd74fdaea14602 Yu Zhao 2022-09-18 4089 /* a racy check to curtail the waiting time */
bd74fdaea14602 Yu Zhao 2022-09-18 4090 if (wq_has_sleeper(&walk->lruvec->mm_state.wait))
bd74fdaea14602 Yu Zhao 2022-09-18 4091 return 1;
bd74fdaea14602 Yu Zhao 2022-09-18 4092
bd74fdaea14602 Yu Zhao 2022-09-18 4093 if (need_resched() || walk->batched >= MAX_LRU_BATCH) {
bd74fdaea14602 Yu Zhao 2022-09-18 4094 end = (addr | ~PUD_MASK) + 1;
bd74fdaea14602 Yu Zhao 2022-09-18 4095 goto done;
bd74fdaea14602 Yu Zhao 2022-09-18 4096 }
bd74fdaea14602 Yu Zhao 2022-09-18 4097 }
bd74fdaea14602 Yu Zhao 2022-09-18 4098
bd74fdaea14602 Yu Zhao 2022-09-18 4099 if (i < PTRS_PER_PUD && get_next_vma(P4D_MASK, PUD_SIZE, args, &start, &end))
bd74fdaea14602 Yu Zhao 2022-09-18 4100 goto restart;
bd74fdaea14602 Yu Zhao 2022-09-18 4101
bd74fdaea14602 Yu Zhao 2022-09-18 4102 end = round_up(end, P4D_SIZE);
bd74fdaea14602 Yu Zhao 2022-09-18 4103 done:
bd74fdaea14602 Yu Zhao 2022-09-18 4104 if (!end || !args->vma)
bd74fdaea14602 Yu Zhao 2022-09-18 4105 return 1;
bd74fdaea14602 Yu Zhao 2022-09-18 4106
bd74fdaea14602 Yu Zhao 2022-09-18 4107 walk->next_addr = max(end, args->vma->vm_start);
bd74fdaea14602 Yu Zhao 2022-09-18 4108
bd74fdaea14602 Yu Zhao 2022-09-18 4109 return -EAGAIN;
bd74fdaea14602 Yu Zhao 2022-09-18 4110 }
bd74fdaea14602 Yu Zhao 2022-09-18 4111
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
next reply other threads:[~2023-01-19 8:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-19 8:09 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2023-12-11 2:47 mm/vmscan.c:4080:29: sparse: sparse: cast to non-scalar kernel test robot
2023-06-29 19:18 kernel test robot
2023-05-10 17:31 kernel test robot
2023-03-29 19:28 kernel test robot
2023-03-29 18:57 kernel test robot
2023-01-19 3:53 kernel test robot
2022-12-02 6:49 kernel test robot
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