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    Subject[PATCH v3 13/22] tracing: Remove regular RCU context for _rcuidle tracepoints (again)
    Effectively revert commit 865e63b04e9b2 ("tracing: Add back in
    rcu_irq_enter/exit_irqson() for rcuidle tracepoints") now that we've
    taught perf how to deal with not having an RCU context provided.

    Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    ---
    include/linux/tracepoint.h | 8 ++------
    1 file changed, 2 insertions(+), 6 deletions(-)

    --- a/include/linux/tracepoint.h
    +++ b/include/linux/tracepoint.h
    @@ -179,10 +179,8 @@ static inline struct tracepoint *tracepo
    * For rcuidle callers, use srcu since sched-rcu \
    * doesn't work from the idle path. \
    */ \
    - if (rcuidle) { \
    + if (rcuidle) \
    __idx = srcu_read_lock_notrace(&tracepoint_srcu);\
    - rcu_irq_enter_irqsave(); \
    - } \
    \
    it_func_ptr = rcu_dereference_raw((tp)->funcs); \
    \
    @@ -194,10 +192,8 @@ static inline struct tracepoint *tracepo
    } while ((++it_func_ptr)->func); \
    } \
    \
    - if (rcuidle) { \
    - rcu_irq_exit_irqsave(); \
    + if (rcuidle) \
    srcu_read_unlock_notrace(&tracepoint_srcu, __idx);\
    - } \
    \
    preempt_enable_notrace(); \
    } while (0)

    \
     
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      Last update: 2020-02-19 16:15    [W:4.123 / U:0.076 seconds]
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