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Commit 4a1dfd7f authored by Paul E. McKenney's avatar Paul E. McKenney Committed by Gerrit - the friendly Code Review server
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rcu: Simplify rcu_sched_qs() control flow 



This commit applies an early-exit approach to rcu_sched_qs(), reducing
the nesting level and saving a line of code.

Change-Id: Ib5dff7a0e3a26ce8ed319fd03b15e77b7b6650db
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Git-commit: fecbf6f01fbd83e6419ccb7f61d9a6eb987f1d92
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: default avatarPrateek Sood <prsood@codeaurora.org>
parent ae2a1f63

kernel/rcu/tree.c

+14 −15
Original line number Diff line number Diff line
@@ -250,7 +250,8 @@ void rcu_sched_qs(void) 
{

	unsigned long flags;



	if (__this_cpu_read(rcu_sched_data.cpu_no_qs.s)) {

	if (!__this_cpu_read(rcu_sched_data.cpu_no_qs.s))

		return;

	trace_rcu_grace_period(TPS("rcu_sched"),

			       __this_cpu_read(rcu_sched_data.gpnum),

			       TPS("cpuqs"));
@@ -261,12 +262,10 @@ void rcu_sched_qs(void) 
	if (__this_cpu_read(rcu_sched_data.cpu_no_qs.b.exp)) {

		__this_cpu_write(rcu_sched_data.cpu_no_qs.b.exp, false);

		rcu_report_exp_rdp(&rcu_sched_state,

					   this_cpu_ptr(&rcu_sched_data),

					   true);

				   this_cpu_ptr(&rcu_sched_data), true);

	}

	local_irq_restore(flags);

}

}



void rcu_bh_qs(void)

{