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rcutiny.c

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  • user avatar
    Paul E. McKenney authored and Paul E. McKenney committed
    RCU, RCU-bh, and RCU-sched read-side critical sections are forbidden
    in the inner idle loop, that is, between the rcu_idle_enter() and the
    rcu_idle_exit() -- RCU will happily ignore any such read-side critical
    sections.  However, things like powertop need tracepoints in the inner
    idle loop.
    
    This commit therefore provides an RCU_NONIDLE() macro that can be used to
    wrap code in the idle loop that requires RCU read-side critical sections.
    
    Suggested-by: default avatarSteven Rostedt <rostedt@goodmis.org>
    Signed-off-by: default avatarPaul E. McKenney <paul.mckenney@linaro.org>
    Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
    Reviewed-by: default avatarJosh Triplett <josh@joshtriplett.org>
    Acked-by: default avatarDeepthi Dharwar <deepthi@linux.vnet.ibm.com>
    8a2ecf47
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    rcutiny.c 10.24 KiB