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Message-id: <1263611228-6751-30-git-send-email-yinghai@kernel.org>
Date: Fri, 15 Jan 2010 19:07:00 -0800
From: Yinghai Lu <yinghai@...nel.org>
To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Jesse Barnes <jbarnes@...tuousgeek.org>,
Christoph Lameter <cl@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 29/37] sparseirq: change irq_desc_ptrs to static
add replace_irq_desc()
Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
kernel/irq/handle.c | 8 +++++++-
kernel/irq/internals.h | 6 +-----
kernel/irq/numa_migrate.c | 4 ++--
3 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 0e823c0..c833c09 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -127,7 +127,7 @@ static void init_one_irq_desc(int irq, struct irq_desc *desc, int node)
*/
DEFINE_RAW_SPINLOCK(sparse_irq_lock);
-struct irq_desc **irq_desc_ptrs __read_mostly;
+static struct irq_desc **irq_desc_ptrs __read_mostly;
static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_smp = {
[0 ... NR_IRQS_LEGACY-1] = {
@@ -192,6 +192,12 @@ struct irq_desc *irq_to_desc(unsigned int irq)
return NULL;
}
+void replace_irq_desc(unsigned int irq, struct irq_desc *desc)
+{
+ if (irq_desc_ptrs && irq < nr_irqs)
+ irq_desc_ptrs[irq] = desc;
+}
+
struct irq_desc * __ref irq_to_desc_alloc_node(unsigned int irq, int node)
{
struct irq_desc *desc;
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index b2821f0..c63f3bc 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -21,11 +21,7 @@ extern void clear_kstat_irqs(struct irq_desc *desc);
extern raw_spinlock_t sparse_irq_lock;
#ifdef CONFIG_SPARSE_IRQ
-/* irq_desc_ptrs allocated at boot time */
-extern struct irq_desc **irq_desc_ptrs;
-#else
-/* irq_desc_ptrs is a fixed size array */
-extern struct irq_desc *irq_desc_ptrs[NR_IRQS];
+void replace_irq_desc(unsigned int irq, struct irq_desc *desc);
#endif
#ifdef CONFIG_PROC_FS
diff --git a/kernel/irq/numa_migrate.c b/kernel/irq/numa_migrate.c
index 26bac9d..963559d 100644
--- a/kernel/irq/numa_migrate.c
+++ b/kernel/irq/numa_migrate.c
@@ -70,7 +70,7 @@ static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc,
raw_spin_lock_irqsave(&sparse_irq_lock, flags);
/* We have to check it to avoid races with another CPU */
- desc = irq_desc_ptrs[irq];
+ desc = irq_to_desc(irq);
if (desc && old_desc != desc)
goto out_unlock;
@@ -90,7 +90,7 @@ static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc,
goto out_unlock;
}
- irq_desc_ptrs[irq] = desc;
+ replace_irq_desc(irq, desc);
raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
/* free the old one */
--
1.6.4.2
--
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