Commit 00943a60 authored by Wei Yang's avatar Wei Yang Committed by Paul E. McKenney
Browse files

rcu: gp_max is protected by root rcu_node's lock 



Because gp_max is protected by root rcu_node's lock, this commit moves
the gp_max definition to the region of the rcu_node structure containing
fields protected by this lock.

Signed-off-by: default avatarWei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent c6dfd72b

kernel/rcu/tree.h

+2 −2
Original line number Diff line number Diff line
@@ -302,6 +302,8 @@ struct rcu_state { 
	u8	boost ____cacheline_internodealigned_in_smp;

						/* Subject to priority boost. */

	unsigned long gp_seq;			/* Grace-period sequence #. */

	unsigned long gp_max;			/* Maximum GP duration in */

						/*  jiffies. */

	struct task_struct *gp_kthread;		/* Task for grace periods. */

	struct swait_queue_head gp_wq;		/* Where GP task waits. */

	short gp_flags;				/* Commands for GP task. */
@@ -347,8 +349,6 @@ struct rcu_state { 
						/*  a reluctant CPU. */

	unsigned long n_force_qs_gpstart;	/* Snapshot of n_force_qs at */

						/*  GP start. */

	unsigned long gp_max;			/* Maximum GP duration in */

						/*  jiffies. */

	const char *name;			/* Name of structure. */

	char abbr;				/* Abbreviated name. */

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