* [openeuler:OLK-6.6 2528/7513] fs/proc/etmem_scan.c:737:16: sparse: sparse: cast removes address space '__rcu' of expression
@ 2024-04-24 2:44 kernel test robot
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From: kernel test robot @ 2024-04-24 2:44 UTC (permalink / raw
To: kernel, Yuchen Tang; +Cc: oe-kbuild-all
tree: https://gitee.com/openeuler/kernel.git OLK-6.6
head: 1bab7be76541fb1208df75a4e4e00beb09be471f
commit: 5d3b64fd78b80ec49285f2186e7b5ac5850f76e4 [2528/7513] etmem: add etmem scan feature
config: arm64-randconfig-r131-20240424 (https://download.01.org/0day-ci/archive/20240424/202404241001.LouXWxwt-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20240424/202404241001.LouXWxwt-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202404241001.LouXWxwt-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
fs/proc/etmem_scan.c:269:18: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __user *buf @@ got void *buf @@
fs/proc/etmem_scan.c:269:18: sparse: expected void [noderef] __user *buf
fs/proc/etmem_scan.c:269:18: sparse: got void *buf
>> fs/proc/etmem_scan.c:737:16: sparse: sparse: cast removes address space '__rcu' of expression
fs/proc/etmem_scan.c:1361:40: sparse: sparse: incorrect type in assignment (incompatible argument 2 (different address spaces)) @@ expected long ( *extern [addressable] [assigned] [toplevel] read )( ... ) @@ got long ( * )( ... ) @@
fs/proc/etmem_scan.c:1361:40: sparse: expected long ( *extern [addressable] [assigned] [toplevel] read )( ... )
fs/proc/etmem_scan.c:1361:40: sparse: got long ( * )( ... )
fs/proc/etmem_scan.c:697:46: sparse: sparse: self-comparison always evaluates to false
fs/proc/etmem_scan.c:720:46: sparse: sparse: self-comparison always evaluates to false
vim +/__rcu +737 fs/proc/etmem_scan.c
724
725 static int arm_page_range(struct page_idle_ctrl *pic,
726 unsigned long addr,
727 unsigned long end)
728 {
729 pgd_t *pgd;
730 unsigned long next;
731 struct kvm *kvm = pic->kvm;
732 int err = 0;
733
734 WARN_ON(addr >= end);
735
736 read_lock(&pic->kvm->mmu_lock);
> 737 pgd = (pgd_t *)kvm->arch.mmu.pgt->pgd + pgd_index(addr) * PTRS_PER_PTE;
738 read_unlock(&pic->kvm->mmu_lock);
739
740 local_irq_disable();
741 do {
742 next = pgd_addr_end(addr, end);
743 if (!pgd_present(*pgd)) {
744 set_restart_gpa(next, "PGD_HOLE");
745 continue;
746 }
747
748 err = arm_p4d_range(pic, pgd, addr, next);
749 if (err)
750 break;
751 } while (pgd++, addr = next, addr != end);
752
753 local_irq_enable();
754 return err;
755 }
756 #endif
757
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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