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BUG: KCSAN: data-race in __pagevec_lru_add / lru_add_drain_all

write to 0xffff88813bd27970 of 1 bytes by task 4519 on cpu 1:
 pagevec_reinit include/linux/pagevec.h:60 [inline]
 __pagevec_lru_add+0x24b/0x280 mm/swap.c:1031
 lru_add_drain_cpu+0x6a/0x250 mm/swap.c:616
 lru_add_drain mm/swap.c:720 [inline]
 __pagevec_release+0x5a/0xd0 mm/swap.c:951
 pagevec_release include/linux/pagevec.h:85 [inline]
 shmem_undo_range+0x49c/0x12b0 mm/shmem.c:954
 shmem_truncate_range mm/shmem.c:1058 [inline]
 shmem_evict_inode+0x115/0x530 mm/shmem.c:1158
 evict+0x1aa/0x410 fs/inode.c:577
 iput_final fs/inode.c:1651 [inline]
 iput+0x421/0x510 fs/inode.c:1677
 dentry_unlink_inode+0x1f3/0x210 fs/dcache.c:374
 __dentry_kill+0x28b/0x450 fs/dcache.c:579
 dentry_kill fs/dcache.c:692 [inline]
 dput+0x203/0x420 fs/dcache.c:878
 do_renameat2+0x5cf/0x900 fs/namei.c:4459
 __do_sys_rename fs/namei.c:4506 [inline]
 __se_sys_rename fs/namei.c:4504 [inline]
 __x64_sys_rename+0x58/0x60 fs/namei.c:4504
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88813bd27970 of 1 bytes by task 1661 on cpu 0:
 pagevec_count include/linux/pagevec.h:65 [inline]
 lru_add_drain_all+0x108/0x3c0 mm/swap.c:823
 khugepaged_do_scan+0x47/0x320 mm/khugepaged.c:2202
 khugepaged+0x75/0x650 mm/khugepaged.c:2263
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 1661 Comm: khugepaged Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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