Commit cd006509b0a9 ("blk-iocost: account for IO size when testing latencies") selects the non-existing config BLK_RQ_IO_DATA_LEN in config BLK_CGROUP_IOCOST. Hence, ./scripts/checkkconfigsymbols.py warns: BLK_RQ_IO_DATA_LEN Referencing files: block/Kconfig Probably, this select is just some unintended left-over from an earlier draft version; BLK_RQ_IO_DATA_LEN was never defined in any commit in the repository. So, drop this dead select to an undefined config. Fixes: cd006509b0a9 ("blk-iocost: account for IO size when testing latencies") Signed-off-by: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx> Acked-by: Tejun Heo <tj@xxxxxxxxxx> --- first submission: https://lore.kernel.org/all/20211112093728.3237-1-lukas.bulwahn@xxxxxxxxx/ Patch is already acked by Tejun. Jens, please pick this quick minor clean-up patch. block/Kconfig | 1 - 1 file changed, 1 deletion(-) diff --git a/block/Kconfig b/block/Kconfig index d5d4197b7ed2..80826e28d0d5 100644 --- a/block/Kconfig +++ b/block/Kconfig @@ -136,7 +136,6 @@ config BLK_CGROUP_FC_APPID config BLK_CGROUP_IOCOST bool "Enable support for cost model based cgroup IO controller" depends on BLK_CGROUP - select BLK_RQ_IO_DATA_LEN select BLK_RQ_ALLOC_TIME help Enabling this option enables the .weight interface for cost -- 2.17.1