/proc/irq never removes any entries, but when irq descriptors can be freed for real this is necessary. Otherwise we'd reference a freed descriptor in /proc/irq/N Signed-off-by: Thomas Gleixner --- kernel/irq/internals.h | 2 ++ kernel/irq/irqdesc.c | 2 ++ kernel/irq/proc.c | 18 ++++++++++++++++++ 3 files changed, 22 insertions(+) Index: linux-2.6-tip/kernel/irq/internals.h =================================================================== --- linux-2.6-tip.orig/kernel/irq/internals.h +++ linux-2.6-tip/kernel/irq/internals.h @@ -26,10 +26,12 @@ void replace_irq_desc(unsigned int irq, #ifdef CONFIG_PROC_FS extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); +extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); extern void register_handler_proc(unsigned int irq, struct irqaction *action); extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); #else static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } +static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); { } static inline void register_handler_proc(unsigned int irq, struct irqaction *action) { } static inline void unregister_handler_proc(unsigned int irq, Index: linux-2.6-tip/kernel/irq/irqdesc.c =================================================================== --- linux-2.6-tip.orig/kernel/irq/irqdesc.c +++ linux-2.6-tip/kernel/irq/irqdesc.c @@ -210,6 +210,8 @@ static void free_desc(unsigned int irq) struct irq_desc *desc = irq_to_desc(irq); unsigned long flags; + unregister_irq_proc(irq, desc); + raw_spin_lock_irqsave(&sparse_irq_lock, flags); delete_irq_desc(irq); raw_spin_unlock_irqrestore(&sparse_irq_lock, flags); Index: linux-2.6-tip/kernel/irq/proc.c =================================================================== --- linux-2.6-tip.orig/kernel/irq/proc.c +++ linux-2.6-tip/kernel/irq/proc.c @@ -297,6 +297,24 @@ void register_irq_proc(unsigned int irq, &irq_spurious_proc_fops, (void *)(long)irq); } +void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) +{ + char name [MAX_NAMELEN]; + + if (!root_irq_dir || !desc->dir) + return; +#ifdef CONFIG_SMP + remove_proc_entry("smp_affinity", desc->dir); + remove_proc_entry("affinity_hint", desc->dir); + remove_proc_entry("node", desc->dir); +#endif + remove_proc_entry("spurious", desc->dir); + + memset(name, 0, MAX_NAMELEN); + sprintf(name, "%u", irq); + remove_proc_entry(name, root_irq_dir); +} + #undef MAX_NAMELEN void unregister_handler_proc(unsigned int irq, struct irqaction *action) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/