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authorFrederic Weisbecker <fweisbec@gmail.com>2012-11-07 21:03:07 +0100
committerFrederic Weisbecker <fweisbec@gmail.com>2012-11-17 19:30:39 +0100
commit00b42959106a9ca1c2899e591ae4e9a83ad6af05 (patch)
tree7dd755a813fe7a7fe635082fc5010eb73725f2fe /kernel/irq_work.c
parent33a5f6261a61af28f7b4c86f9f958da0f206c914 (diff)
downloadlinux-sh-00b42959106a9ca1c2899e591ae4e9a83ad6af05.tar.gz
irq_work: Don't stop the tick with pending works
Don't stop the tick if we have pending irq works on the queue, otherwise if the arch can't raise self-IPIs, we may not find an opportunity to execute the pending works for a while. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Diffstat (limited to 'kernel/irq_work.c')
-rw-r--r--kernel/irq_work.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/irq_work.c b/kernel/irq_work.c
index 64eddd59ed83..b3c113a14727 100644
--- a/kernel/irq_work.c
+++ b/kernel/irq_work.c
@@ -99,6 +99,17 @@ bool irq_work_queue(struct irq_work *work)
}
EXPORT_SYMBOL_GPL(irq_work_queue);
+bool irq_work_needs_cpu(void)
+{
+ struct llist_head *this_list;
+
+ this_list = &__get_cpu_var(irq_work_list);
+ if (llist_empty(this_list))
+ return false;
+
+ return true;
+}
+
/*
* Run the irq_work entries on this cpu. Requires to be ran from hardirq
* context with local IRQs disabled.