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BUG: KCSAN: data-race in shrink_dentry_list / step_into

read-write to 0xffff8881006e3180 of 4 bytes by task 3866 on cpu 0:
 d_shrink_del fs/dcache.c:449 [inline]
 shrink_dentry_list+0x19f/0x3e0 fs/dcache.c:1074
 shrink_dcache_sb+0x154/0x280 fs/dcache.c:1195
 reconfigure_super+0x4c1/0x5b0 fs/super.c:1050