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authorYinghai Lu <yinghai@kernel.org>2009-02-08 19:18:03 -0500
committerIngo Molnar <mingo@elte.hu>2009-02-09 03:02:34 -0500
commit005bf0e6fa0e9543933fe2e36322af649df7cacb (patch)
treeb14afa63f043d8c1fcf705b2d60262d873ec8f3f /kernel
parent0f3c2a89c1451cdf6328f99977bd9decd4f708e1 (diff)
irq: optimize init_kstat_irqs/init_copy_kstat_irqs
Simplify and make init_kstat_irqs etc more type proof, suggested by Andrew. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/irq/handle.c20
-rw-r--r--kernel/irq/numa_migrate.c11
2 files changed, 14 insertions, 17 deletions
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 1b473e7569aa..49d642b62c64 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -71,19 +71,21 @@ static struct irq_desc irq_desc_init = {
71 71
72void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr) 72void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr)
73{ 73{
74 unsigned long bytes;
75 char *ptr;
76 int node; 74 int node;
77 75 void *ptr;
78 /* Compute how many bytes we need per irq and allocate them */
79 bytes = nr * sizeof(unsigned int);
80 76
81 node = cpu_to_node(cpu); 77 node = cpu_to_node(cpu);
82 ptr = kzalloc_node(bytes, GFP_ATOMIC, node); 78 ptr = kzalloc_node(nr * sizeof(*desc->kstat_irqs), GFP_ATOMIC, node);
83 printk(KERN_DEBUG " alloc kstat_irqs on cpu %d node %d\n", cpu, node);
84 79
85 if (ptr) 80 /*
86 desc->kstat_irqs = (unsigned int *)ptr; 81 * don't overwite if can not get new one
82 * init_copy_kstat_irqs() could still use old one
83 */
84 if (ptr) {
85 printk(KERN_DEBUG " alloc kstat_irqs on cpu %d node %d\n",
86 cpu, node);
87 desc->kstat_irqs = ptr;
88 }
87} 89}
88 90
89static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu) 91static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu)
diff --git a/kernel/irq/numa_migrate.c b/kernel/irq/numa_migrate.c
index ecf765c6a77a..c500cfe422b6 100644
--- a/kernel/irq/numa_migrate.c
+++ b/kernel/irq/numa_migrate.c
@@ -17,16 +17,11 @@ static void init_copy_kstat_irqs(struct irq_desc *old_desc,
17 struct irq_desc *desc, 17 struct irq_desc *desc,
18 int cpu, int nr) 18 int cpu, int nr)
19{ 19{
20 unsigned long bytes;
21
22 init_kstat_irqs(desc, cpu, nr); 20 init_kstat_irqs(desc, cpu, nr);
23 21
24 if (desc->kstat_irqs != old_desc->kstat_irqs) { 22 if (desc->kstat_irqs != old_desc->kstat_irqs)
25 /* Compute how many bytes we need per irq and allocate them */ 23 memcpy(desc->kstat_irqs, old_desc->kstat_irqs,
26 bytes = nr * sizeof(unsigned int); 24 nr * sizeof(*desc->kstat_irqs));
27
28 memcpy(desc->kstat_irqs, old_desc->kstat_irqs, bytes);
29 }
30} 25}
31 26
32static void free_kstat_irqs(struct irq_desc *old_desc, struct irq_desc *desc) 27static void free_kstat_irqs(struct irq_desc *old_desc, struct irq_desc *desc)