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Subject[PATCH 1/2 -tip] irq: remove unneeded desc->chip->ack check
desc->chip->ack is initialized to ack_bad().
It will not be NULL.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
---
kernel/irq/chip.c | 3 +--
kernel/irq/handle.c | 14 +++++---------
2 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index f63c706..b929803 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -530,8 +530,7 @@ handle_percpu_irq(unsigned int irq, struct irq_desc *desc)

kstat_incr_irqs_this_cpu(irq, desc);

- if (desc->chip->ack)
- desc->chip->ack(irq);
+ desc->chip->ack(irq);

action_ret = handle_IRQ_event(irq, desc->action);
if (!noirqdebug)
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 6492400..4408672 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -337,11 +337,9 @@ unsigned int __do_IRQ(unsigned int irq)
/*
* No locking required for CPU-local interrupts:
*/
- if (desc->chip->ack) {
- desc->chip->ack(irq);
- /* get new one */
- desc = irq_remap_to_desc(irq, desc);
- }
+ desc->chip->ack(irq);
+ /* get new one */
+ desc = irq_remap_to_desc(irq, desc);
if (likely(!(desc->status & IRQ_DISABLED))) {
action_ret = handle_IRQ_event(irq, desc->action);
if (!noirqdebug)
@@ -352,10 +350,8 @@ unsigned int __do_IRQ(unsigned int irq)
}

spin_lock(&desc->lock);
- if (desc->chip->ack) {
- desc->chip->ack(irq);
- desc = irq_remap_to_desc(irq, desc);
- }
+ desc->chip->ack(irq);
+ desc = irq_remap_to_desc(irq, desc);
/*
* REPLAY is when Linux resends an IRQ that was dropped earlier
* WAITING is used by probe to mark irqs that are being tested
--
1.5.3.4




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