• Paul E. McKenney's avatar
    rcu: Define RCU-sched API in terms of RCU for Tree RCU PREEMPT builds · 45975c7d
    Paul E. McKenney authored
    Now that RCU-preempt knows about preemption disabling, its implementation
    of synchronize_rcu() works for synchronize_sched(), and likewise for the
    other RCU-sched update-side API members.  This commit therefore confines
    the RCU-sched update-side code to CONFIG_PREEMPT=n builds, and defines
    RCU-sched's update-side API members in terms of those of RCU-preempt.
    
    This means that any given build of the Linux kernel has only one
    update-side flavor of RCU, namely RCU-preempt for CONFIG_PREEMPT=y builds
    and RCU-sched for CONFIG_PREEMPT=n builds.  This in turn means that kernels
    built with CONFIG_RCU_NOCB_CPU=y have only one rcuo kthread per CPU.
    Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
    Cc: Andi Kleen <ak@linux.intel.com>
    45975c7d
tree_exp.h 25.8 KB