diff options
| author | Mark Brown <broonie@kernel.org> | 2014-10-20 17:55:07 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2014-10-20 18:27:32 +0100 |
| commit | b7a40242c82cd73cfcea305f23e67d068dd8401a (patch) | |
| tree | 251b49d19cd7c371847ae1f951e1b537ca0e1c15 /kernel/rcu/tree_plugin.h | |
| parent | d26833bfce5e56017bea9f1f50838f20e18e7b7e (diff) | |
| parent | 9c6de47d53a3ce8df1642ae67823688eb98a190a (diff) | |
Merge branch 'fix/dw' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-dw
Conflicts:
drivers/spi/spi-dw-mid.c
Diffstat (limited to 'kernel/rcu/tree_plugin.h')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 00dc411e9676..a7997e272564 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -2074,9 +2074,9 @@ static void wake_nocb_leader(struct rcu_data *rdp, bool force) if (!ACCESS_ONCE(rdp_leader->nocb_kthread)) return; - if (!ACCESS_ONCE(rdp_leader->nocb_leader_wake) || force) { + if (ACCESS_ONCE(rdp_leader->nocb_leader_sleep) || force) { /* Prior xchg orders against prior callback enqueue. */ - ACCESS_ONCE(rdp_leader->nocb_leader_wake) = true; + ACCESS_ONCE(rdp_leader->nocb_leader_sleep) = false; wake_up(&rdp_leader->nocb_wq); } } @@ -2253,7 +2253,7 @@ wait_again: if (!rcu_nocb_poll) { trace_rcu_nocb_wake(my_rdp->rsp->name, my_rdp->cpu, "Sleep"); wait_event_interruptible(my_rdp->nocb_wq, - ACCESS_ONCE(my_rdp->nocb_leader_wake)); + !ACCESS_ONCE(my_rdp->nocb_leader_sleep)); /* Memory barrier handled by smp_mb() calls below and repoll. */ } else if (firsttime) { firsttime = false; /* Don't drown trace log with "Poll"! */ @@ -2292,12 +2292,12 @@ wait_again: schedule_timeout_interruptible(1); /* Rescan in case we were a victim of memory ordering. */ - my_rdp->nocb_leader_wake = false; - smp_mb(); /* Ensure _wake false before scan. */ + my_rdp->nocb_leader_sleep = true; + smp_mb(); /* Ensure _sleep true before scan. */ for (rdp = my_rdp; rdp; rdp = rdp->nocb_next_follower) if (ACCESS_ONCE(rdp->nocb_head)) { /* Found CB, so short-circuit next wait. */ - my_rdp->nocb_leader_wake = true; + my_rdp->nocb_leader_sleep = false; break; } goto wait_again; @@ -2307,17 +2307,17 @@ wait_again: rcu_nocb_wait_gp(my_rdp); /* - * We left ->nocb_leader_wake set to reduce cache thrashing. - * We clear it now, but recheck for new callbacks while + * We left ->nocb_leader_sleep unset to reduce cache thrashing. + * We set it now, but recheck for new callbacks while * traversing our follower list. */ - my_rdp->nocb_leader_wake = false; - smp_mb(); /* Ensure _wake false before scan of ->nocb_head. */ + my_rdp->nocb_leader_sleep = true; + smp_mb(); /* Ensure _sleep true before scan of ->nocb_head. */ /* Each pass through the following loop wakes a follower, if needed. */ for (rdp = my_rdp; rdp; rdp = rdp->nocb_next_follower) { if (ACCESS_ONCE(rdp->nocb_head)) - my_rdp->nocb_leader_wake = true; /* No need to wait. */ + my_rdp->nocb_leader_sleep = false;/* No need to sleep.*/ if (!rdp->nocb_gp_head) continue; /* No CBs, so no need to wake follower. */ |