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Commit 2723249a authored by Paul E. McKenney's avatar Paul E. McKenney
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rcu: Wire ->rda pointers at compile time 



This commit wires up the rcu_state structures' ->rda pointers to the
per-CPU rcu_data structures at compile time, thus ensuring that this
linkage is present at early boot, in turn allowing posting of callbacks
before rcu_init() is executed.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent d3f3f3f2

kernel/rcu/tree.c

+3 −3
Original line number Diff line number Diff line
@@ -91,8 +91,10 @@ static const char *tp_##sname##_varname __used __tracepoint_string = sname##_var 


#define RCU_STATE_INITIALIZER(sname, sabbr, cr) \

DEFINE_RCU_TPS(sname) \

DEFINE_PER_CPU_SHARED_ALIGNED(struct rcu_data, sname##_data); \

struct rcu_state sname##_state = { \

	.level = { &sname##_state.node[0] }, \

	.rda = &sname##_data, \

	.call = cr, \

	.fqs_state = RCU_GP_IDLE, \

	.gpnum = 0UL - 300UL, \
@@ -104,8 +106,7 @@ struct rcu_state sname##_state = { \ 
	.onoff_mutex = __MUTEX_INITIALIZER(sname##_state.onoff_mutex), \

	.name = RCU_STATE_NAME(sname), \

	.abbr = sabbr, \

}; \

DEFINE_PER_CPU_SHARED_ALIGNED(struct rcu_data, sname##_data)

}



RCU_STATE_INITIALIZER(rcu_sched, 's', call_rcu_sched);

RCU_STATE_INITIALIZER(rcu_bh, 'b', call_rcu_bh);
@@ -3843,7 +3844,6 @@ static void __init rcu_init_one(struct rcu_state *rsp, 
		}

	}



	rsp->rda = rda;

	init_waitqueue_head(&rsp->gp_wq);

	rnp = rsp->level[rcu_num_lvls - 1];

	for_each_possible_cpu(i) {