835f14ed53
Currently, any kernel built with CONFIG_PREEMPTION=y also gets CONFIG_TASKS_RCU=y, which is not helpful to people trying to build preemptible kernels of minimal size. Because CONFIG_TASKS_RCU=y is needed only in kernels doing tracing of one form or another, this commit moves from TASKS_RCU deciding when it should be enabled to the tracing Kconfig options explicitly selecting it. This allows building preemptible kernels without TASKS_RCU, if desired. This commit also updates the SRCU-N and TREE09 rcutorture scenarios in order to avoid Kconfig errors that would otherwise result from CONFIG_TASKS_RCU being selected without its CONFIG_RCU_EXPERT dependency being met. [ paulmck: Apply BPF_SYSCALL feedback from Andrii Nakryiko. ] Reported-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com> Tested-by: Zhouyi Zhou <zhouzhouyi@gmail.com> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
18 lines
363 B
Plaintext
18 lines
363 B
Plaintext
CONFIG_SMP=n
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CONFIG_NR_CPUS=1
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CONFIG_PREEMPT_NONE=n
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CONFIG_PREEMPT_VOLUNTARY=n
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CONFIG_PREEMPT=y
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#CHECK#CONFIG_PREEMPT_RCU=y
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CONFIG_HZ_PERIODIC=n
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CONFIG_NO_HZ_IDLE=y
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CONFIG_NO_HZ_FULL=n
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CONFIG_RCU_TRACE=n
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CONFIG_RCU_NOCB_CPU=n
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CONFIG_DEBUG_LOCK_ALLOC=n
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CONFIG_RCU_BOOST=n
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CONFIG_DEBUG_OBJECTS_RCU_HEAD=n
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#CHECK#CONFIG_RCU_EXPERT=n
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CONFIG_KPROBES=n
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CONFIG_FTRACE=n
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