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Commit 005bf0e6 authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
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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: default avatarYinghai Lu <yinghai@kernel.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 0f3c2a89

kernel/irq/handle.c

+11 −9
Original line number Diff line number Diff line
@@ -71,19 +71,21 @@ static struct irq_desc irq_desc_init = { 


void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr)

{

	unsigned long bytes;

	char *ptr;

	int node;



	/* Compute how many bytes we need per irq and allocate them */

	bytes = nr * sizeof(unsigned int);

	void *ptr;



	node = cpu_to_node(cpu);

	ptr = kzalloc_node(bytes, GFP_ATOMIC, node);

	printk(KERN_DEBUG "  alloc kstat_irqs on cpu %d node %d\n", cpu, node);

	ptr = kzalloc_node(nr * sizeof(*desc->kstat_irqs), GFP_ATOMIC, node);



	if (ptr)

		desc->kstat_irqs = (unsigned int *)ptr;

	/*

	 * don't overwite if can not get new one

	 * init_copy_kstat_irqs() could still use old one

	 */

	if (ptr) {

		printk(KERN_DEBUG "  alloc kstat_irqs on cpu %d node %d\n",

			 cpu, node);

		desc->kstat_irqs = ptr;

	}

}



static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu)

kernel/irq/numa_migrate.c

+3 −8
Original line number Diff line number Diff line
@@ -17,16 +17,11 @@ static void init_copy_kstat_irqs(struct irq_desc *old_desc, 
				 struct irq_desc *desc,

				 int cpu, int nr)

{

	unsigned long bytes;



	init_kstat_irqs(desc, cpu, nr);



	if (desc->kstat_irqs != old_desc->kstat_irqs) {

		/* Compute how many bytes we need per irq and allocate them */

		bytes = nr * sizeof(unsigned int);



		memcpy(desc->kstat_irqs, old_desc->kstat_irqs, bytes);

	}

	if (desc->kstat_irqs != old_desc->kstat_irqs)

		memcpy(desc->kstat_irqs, old_desc->kstat_irqs,

			 nr * sizeof(*desc->kstat_irqs));

}



static void free_kstat_irqs(struct irq_desc *old_desc, struct irq_desc *desc)