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| author | Ingo Molnar <mingo@kernel.org> | 2012-07-18 11:17:17 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-07-18 11:17:17 +0200 |
| commit | a2fe194723f6e4990d01d8c208c7b138fd410522 (patch) | |
| tree | 7aee93fa8f4ba1e18b56fa7d8eab75d249fc6966 /kernel/rcutree_plugin.h | |
| parent | c3b7cdf180090d2686239a75bb0ae408108ed749 (diff) | |
| parent | a018540141a931f5299a866907b27886916b4374 (diff) | |
| download | blackbird-op-linux-a2fe194723f6e4990d01d8c208c7b138fd410522.tar.gz blackbird-op-linux-a2fe194723f6e4990d01d8c208c7b138fd410522.zip | |
Merge branch 'linus' into perf/core
Pick up the latest ring-buffer fixes, before applying a new fix.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/rcutree_plugin.h')
| -rw-r--r-- | kernel/rcutree_plugin.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h index 5271a020887e..3e4899459f3d 100644 --- a/kernel/rcutree_plugin.h +++ b/kernel/rcutree_plugin.h @@ -153,7 +153,7 @@ static void rcu_preempt_qs(int cpu) * * Caller must disable preemption. */ -void rcu_preempt_note_context_switch(void) +static void rcu_preempt_note_context_switch(int cpu) { struct task_struct *t = current; unsigned long flags; @@ -164,7 +164,7 @@ void rcu_preempt_note_context_switch(void) (t->rcu_read_unlock_special & RCU_READ_UNLOCK_BLOCKED) == 0) { /* Possibly blocking in an RCU read-side critical section. */ - rdp = __this_cpu_ptr(rcu_preempt_state.rda); + rdp = per_cpu_ptr(rcu_preempt_state.rda, cpu); rnp = rdp->mynode; raw_spin_lock_irqsave(&rnp->lock, flags); t->rcu_read_unlock_special |= RCU_READ_UNLOCK_BLOCKED; @@ -228,7 +228,7 @@ void rcu_preempt_note_context_switch(void) * means that we continue to block the current grace period. */ local_irq_save(flags); - rcu_preempt_qs(smp_processor_id()); + rcu_preempt_qs(cpu); local_irq_restore(flags); } @@ -1002,6 +1002,14 @@ void rcu_force_quiescent_state(void) EXPORT_SYMBOL_GPL(rcu_force_quiescent_state); /* + * Because preemptible RCU does not exist, we never have to check for + * CPUs being in quiescent states. + */ +static void rcu_preempt_note_context_switch(int cpu) +{ +} + +/* * Because preemptible RCU does not exist, there are never any preempted * RCU readers. */ |
