Hello, KCSAN issues a lot of warnings for various find_*_bit() functions. This is because some users (such as xarray) use these functions without protection from concurrent modifications (e.g. xarray tag searching is protected only by RCU) and find_*_bit() implementations are indeed prone to refetching values from memory with undefined results. This series fixes these problems. See patch 1 for more details. Mirsad, can you give these patches testing on your setup? Thanks! Honza