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This commit validates that the caller of rcu_sync_is_idle() holds the corresponding type of RCU read-side lock, but only in kernels built with CONFIG_PROVE_RCU=y. This validation is carried out via a new rcu_sync_ops->held() method that is checked within rcu_sync_is_idle(). Note that although this does add code to the fast path, it only does so in kernels built with CONFIG_PROVE_RCU=y. Suggested-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org> |
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