diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2013-03-19 12:21:29 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2013-06-10 13:39:44 -0700 |
| commit | 63274cfb94aac109fc2490a70a96b26751608e57 (patch) | |
| tree | 9e14753b46b04098ebd08607246a21cedd5dd235 /kernel/rcutree.c | |
| parent | ba9fbe955f026780e6b27c279dba7c86dfdcb7d5 (diff) | |
rcu: Eliminate check_for_new_grace_period() wrapper function
One of the calls to check_for_new_grace_period() is now redundant due to
an immediately preceding call to note_gp_changes(). Eliminating this
redundant call leaves a single caller, which is simpler if inlined.
This commit therefore eliminates the redundant call and inlines the
body of check_for_new_grace_period() into the single remaining call site.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'kernel/rcutree.c')
| -rw-r--r-- | kernel/rcutree.c | 25 |
1 files changed, 3 insertions, 22 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c index ac8f03c4147..b73014998b4 100644 --- a/kernel/rcutree.c +++ b/kernel/rcutree.c @@ -1308,26 +1308,6 @@ static void note_gp_changes(struct rcu_state *rsp, struct rcu_data *rdp) } /* - * Did someone else start a new RCU grace period start since we last - * checked? Update local state appropriately if so. Must be called - * on the CPU corresponding to rdp. - */ -static int -check_for_new_grace_period(struct rcu_state *rsp, struct rcu_data *rdp) -{ - unsigned long flags; - int ret = 0; - - local_irq_save(flags); - if (rdp->gpnum != rsp->gpnum) { - note_gp_changes(rsp, rdp); - ret = 1; - } - local_irq_restore(flags); - return ret; -} - -/* * Do per-CPU grace-period initialization for running CPU. The caller * must hold the lock of the leaf rcu_node structure corresponding to * this CPU. @@ -1749,8 +1729,10 @@ static void rcu_check_quiescent_state(struct rcu_state *rsp, struct rcu_data *rdp) { /* If there is now a new grace period, record and return. */ - if (check_for_new_grace_period(rsp, rdp)) + if (rdp->gpnum != rsp->gpnum) { + note_gp_changes(rsp, rdp); return; + } /* * Does this CPU still need to do its part for current grace period? @@ -2302,7 +2284,6 @@ static void __call_rcu_core(struct rcu_state *rsp, struct rcu_data *rdp, /* Are we ignoring a completed grace period? */ note_gp_changes(rsp, rdp); - check_for_new_grace_period(rsp, rdp); /* Start a new grace period if one not already started. */ if (!rcu_gp_in_progress(rsp)) { |