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BUG: KCSAN: data-race in __ext4_update_other_inode_time / inode_io_list_del

write to 0xffff888030e28cd8 of 8 bytes by task 8398 on cpu 0:
 inode_io_list_del_locked fs/fs-writeback.c:148 [inline]
 inode_io_list_del+0x9c/0x240 fs/fs-writeback.c:1127
 evict+0xad/0x410 fs/inode.c:565
 iput_final fs/inode.c:1654 [inline]
 iput+0x3fd/0x520 fs/inode.c:1680
 do_unlinkat+0x2e9/0x4f0 fs/namei.c:4103
 __do_sys_unlink fs/namei.c:4143 [inline]
 __se_sys_unlink fs/namei.c:4141 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4141
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888030e28cd8 of 8 bytes by task 1338 on cpu 1:
 inode_is_dirtytime_only include/linux/fs.h:2286 [inline]
 __ext4_update_other_inode_time+0x45/0x550 fs/ext4/inode.c:4965
 ext4_update_other_inodes_time fs/ext4/inode.c:5008 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5137 [inline]
 ext4_mark_iloc_dirty+0x11b6/0x16f0 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x4db/0x5e0 fs/ext4/inode.c:5918
 ext4_evict_inode+0x9a4/0xef0 fs/ext4/inode.c:281
 evict+0x1aa/0x410 fs/inode.c:578
 iput_final fs/inode.c:1654 [inline]
 iput+0x3fd/0x520 fs/inode.c:1680
 dentry_unlink_inode+0x210/0x220 fs/dcache.c:374
 d_delete+0x78/0xa0 fs/dcache.c:2503
 vfs_rmdir+0x28a/0x2a0 fs/namei.c:3913
 do_rmdir+0x186/0x310 fs/namei.c:3962
 __do_sys_rmdir fs/namei.c:3980 [inline]
 __se_sys_rmdir fs/namei.c:3978 [inline]
 __x64_sys_rmdir+0x2c/0x30 fs/namei.c:3978
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 1338 Comm: syz-executor.5 Not tainted 5.12.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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