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rcu: Simplify and inline cpu_needs_another_gp()

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Now that RCU no longer relies on failsafe checks, cpu_needs_another_gp()
can be greatly simplified.  This simplification eliminates the last
call to rcu_future_needs_gp() and to rcu_segcblist_future_gp_needed(),
both of which which can then be eliminated.  And then, because
cpu_needs_another_gp() is called only from __rcu_pending(), it can be
inlined and eliminated.

This commit carries out the simplification, inlining, and elimination
called out above.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Paul E. McKenney
2018-04-12 16:29:13 -07:00
parent 384f77f4cb
commit c1935209df
3 changed files with 3 additions and 57 deletions
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2
kernel/rcu/rcu_segcblist.h
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@@ -134,7 +134,5 @@ void rcu_segcblist_insert_pend_cbs(struct rcu_segcblist *rsclp,
struct rcu_cblist *rclp);
void rcu_segcblist_advance(struct rcu_segcblist *rsclp, unsigned long seq);
bool rcu_segcblist_accelerate(struct rcu_segcblist *rsclp, unsigned long seq);
bool rcu_segcblist_future_gp_needed(struct rcu_segcblist *rsclp,
unsigned long seq);
void rcu_segcblist_merge(struct rcu_segcblist *dst_rsclp,
struct rcu_segcblist *src_rsclp);