Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
rcu: Document that rcu_barrier() hurries lazy callbacks
This commit adds to the rcu_barrier() kerneldoc header stating that this
function hurries lazy callbacks and that it does not normally result in
additional RCU grace periods.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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kernel/rcu/tree.c
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kernel/rcu/tree.c
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* to complete. For example, if there are no RCU callbacks queued anywhere
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* in the system, then rcu_barrier() is within its rights to return
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* immediately, without waiting for anything, much less an RCU grace period.
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* In fact, rcu_barrier() will normally not result in any RCU grace periods
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* beyond those that were already destined to be executed.
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*
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* In kernels built with CONFIG_RCU_LAZY=y, this function also hurries all
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* pending lazy RCU callbacks.
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*/
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void rcu_barrier(void)
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{