The following commit has been merged into the locking/core branch of tip: Commit-ID: 1c6f9ec0095459b5120a1cb059d442f56d3cb6e7 Gitweb: https://git.kernel.org/tip/1c6f9ec0095459b5120a1cb059d442f56d3cb6e7 Author: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> AuthorDate: Tue, 08 Feb 2022 18:21:10 +01:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Fri, 11 Feb 2022 12:13:56 +01:00 locking: Enable RT_MUTEXES by default on PREEMPT_RT. The CONFIG_RT_MUTEXES option is enabled by CONFIG_FUTEX and CONFIG_I2C. If both are disabled then a CONFIG_PREEMPT_RT build fails to compile. It is not possible to have a PREEMPT_RT kernel without RT_MUTEX support because RT_MUTEX based locking is always used. Enable CONFIG_RT_MUTEXES by default on PREEMPT_RT builds. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Link: https://lkml.kernel.org/r/YgKmhjkcuqWXdUjQ@xxxxxxxxxxxxx --- init/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/init/Kconfig b/init/Kconfig index e9119bf..beb5b86 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -2054,6 +2054,7 @@ source "arch/Kconfig" config RT_MUTEXES bool + default y if PREEMPT_RT config BASE_SMALL int
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