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rcu: Eliminate rcu_state structure's ->call field

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The rcu_state structure's ->call field references the corresponding RCU
flavor's call_rcu() function.  However, now that there is only ever one
rcu_state structure in a given build of the Linux kernel, and that flavor
uses plain old call_rcu(), there is not a lot of point in continuing to
have the ->call field.  This commit therefore removes it.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-07-03 15:02:28 -07:00
parent 358be2d368
commit ec5dd444b6
3 changed files with 1 additions and 3 deletions
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1
kernel/rcu/tree.c
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@ -76,7 +76,6 @@ static DEFINE_PER_CPU_SHARED_ALIGNED(struct rcu_data, rcu_data);
struct rcu_state rcu_state = {
.level = { &rcu_state.node[0] },
.rda = &rcu_data,
.call = call_rcu,
.gp_state = RCU_GP_IDLE,
.gp_seq = (0UL - 300UL) << RCU_SEQ_CTR_SHIFT,
.barrier_mutex = __MUTEX_INITIALIZER(rcu_state.barrier_mutex),

1
kernel/rcu/tree.h
View file

@ -313,7 +313,6 @@ struct rcu_state {
/* Hierarchy levels (+1 to */
/* shut bogus gcc warning) */
struct rcu_data __percpu *rda; /* pointer of percu rcu_data. */
call_rcu_func_t call; /* call_rcu() flavor. */
int ncpus; /* # CPUs seen so far. */
/* The following fields are guarded by the root rcu_node's lock. */

2
kernel/rcu/tree_exp.h
View file

@ -619,7 +619,7 @@ static void _synchronize_rcu_expedited(struct rcu_state *rsp,
/* If expedited grace periods are prohibited, fall back to normal. */
if (rcu_gp_is_normal()) {
wait_rcu_gp(rsp->call);
wait_rcu_gp(call_rcu);
return;
}