diff options
Diffstat (limited to 'kernel/Kconfig.preempt')
| -rw-r--r-- | kernel/Kconfig.preempt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt index 54ea59ff8fbe..da326800c1c9 100644 --- a/kernel/Kconfig.preempt +++ b/kernel/Kconfig.preempt @@ -103,6 +103,19 @@ config PREEMPT_RT Select this if you are building a kernel for systems which require real-time guarantees. +config PREEMPT_RT_NEEDS_BH_LOCK + bool "Enforce softirq synchronisation on PREEMPT_RT" + depends on PREEMPT_RT + help + Enforce synchronisation across the softirqs context. On PREEMPT_RT + the softirq is preemptible. This enforces the same per-CPU BLK + semantic non-PREEMPT_RT builds have. This should not be needed + because per-CPU locks were added to avoid the per-CPU BKL. + + This switch provides the old behaviour for testing reasons. Select + this if you suspect an error with preemptible softirq and want test + the old synchronized behaviour. + config PREEMPT_COUNT bool |