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irq: fix cpumask memory leak on offstack cpumask kernels

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Need to free the old cpumask for affinity and pending_mask.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <49D18FF0.50707@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2009-03-30 20:37:20 -07:00 committed by Ingo Molnar
parent 8fe74cf053
commit 9756b15e1b
2 changed files with 15 additions and 0 deletions
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14
include/linux/irq.h
View file

@ -482,6 +482,16 @@ static inline void init_copy_desc_masks(struct irq_desc *old_desc,
#endif
}
static inline void free_desc_masks(struct irq_desc *old_desc,
struct irq_desc *new_desc)
{
free_cpumask_var(old_desc->affinity);
#ifdef CONFIG_GENERIC_PENDING_IRQ
free_cpumask_var(old_desc->pending_mask);
#endif
}
#else /* !CONFIG_SMP */
static inline bool init_alloc_desc_masks(struct irq_desc *desc, int cpu,
@ -495,6 +505,10 @@ static inline void init_copy_desc_masks(struct irq_desc *old_desc,
{
}
static inline void free_desc_masks(struct irq_desc *old_desc,
struct irq_desc *new_desc)
{
}
#endif /* CONFIG_SMP */
#endif /* _LINUX_IRQ_H */

1
kernel/irq/numa_migrate.c
View file

@ -54,6 +54,7 @@ static bool init_copy_one_irq_desc(int irq, struct irq_desc *old_desc,
static void free_one_irq_desc(struct irq_desc *old_desc, struct irq_desc *desc)
{
free_kstat_irqs(old_desc, desc);
free_desc_masks(old_desc, desc);
arch_free_chip_data(old_desc, desc);
}