Commit 3b18eb3f authored Apr 29, 2024 by Valentin Schneider Committed by Neeraj Upadhyay Aug 15, 2024

rcu: Rename rcu_implicit_dynticks_qs() into rcu_watching_snap_recheck()



The context_tracking.state RCU_DYNTICKS subvariable has been renamed to
RCU_WATCHING, drop the dyntick reference and update the name of this helper
to express that it rechecks rdp->watching_snap after an earlier
rcu_watching_snap_save().

Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@kernel.org>

parent 49f82c64

Documentation/RCU/Design/Memory-Ordering/TreeRCU-dyntick.svg

+1 −1

Original line number	Diff line number	Diff line
		@@ -537,7 +537,7 @@
		font-style="normal"
		y="-8368.1475"
		x="2463.3262"
		xml:space="preserve">rcu_implicit_dynticks_qs()</text>
		xml:space="preserve">rcu_watching_snap_recheck()</text>
		</g>
		<g
		id="g4504"

Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-fqs.svg

+1 −1

Original line number	Diff line number	Diff line
		@@ -899,7 +899,7 @@
		font-style="normal"
		y="1858.8729"
		x="4414.1836"
		xml:space="preserve">rcu_implicit_dynticks_qs()</text>
		xml:space="preserve">rcu_watching_snap_recheck()</text>
		<text
		xml:space="preserve"
		x="14659.87"

Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp.svg

+1 −1

Original line number	Diff line number	Diff line
		@@ -3029,7 +3029,7 @@
		font-style="normal"
		y="38425.035"
		x="-337.79462"
		xml:space="preserve">rcu_implicit_dynticks_qs()</text>
		xml:space="preserve">rcu_watching_snap_recheck()</text>
		<text
		xml:space="preserve"
		x="9907.8887"

Documentation/RCU/Design/Memory-Ordering/TreeRCU-hotplug.svg

+1 −1

Original line number	Diff line number	Diff line
		@@ -525,7 +525,7 @@
		font-style="normal"
		y="-8368.1475"
		x="2463.3262"
		xml:space="preserve">rcu_implicit_dynticks_qs()</text>
		xml:space="preserve">rcu_watching_snap_recheck()</text>
		<text
		sodipodi:linespacing="125%"
		style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"

kernel/rcu/tree.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -812,7 +812,7 @@ static int rcu_watching_snap_save(struct rcu_data *rdp)
		*
		* Returns zero otherwise.
		*/
		static int rcu_implicit_dynticks_qs(struct rcu_data *rdp)
		static int rcu_watching_snap_recheck(struct rcu_data *rdp)
		{
		unsigned long jtsq;
		int ret = 0;
		@@ -1998,7 +1998,7 @@ static void rcu_gp_fqs(bool first_time)
		force_qs_rnp(rcu_watching_snap_save);
		} else {
		/* Handle dyntick-idle and offline CPUs. */
		force_qs_rnp(rcu_implicit_dynticks_qs);
		force_qs_rnp(rcu_watching_snap_recheck);
		}
		/* Clear flag to prevent immediate re-entry. */
		if (READ_ONCE(rcu_state.gp_flags) & RCU_GP_FLAG_FQS) {