Low level chip functions need access to irq_desc->handler_data, irq_desc->chip_data and irq_desc->msi_desc. We hand down the irq number to the low level functions, so they need to lookup irq_desc. With sparse irq this means a radix tree lookup. We could hand down irq_desc itself, but low level chip functions have no need to fiddle with it directly and we want to restrict access to irq_desc further. Preparatory patch for new chip functions. Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- include/linux/irq.h | 48 ++++++++++++++++++++++++++++++++---------------- kernel/irq/chip.c | 22 +++++++++++++--------- kernel/irq/handle.c | 11 +++++++++++ 3 files changed, 56 insertions(+), 25 deletions(-) Index: linux-2.6-tip/include/linux/irq.h =================================================================== --- linux-2.6-tip.orig/include/linux/irq.h +++ linux-2.6-tip/include/linux/irq.h @@ -84,6 +84,27 @@ struct proc_dir_entry; struct msi_desc; /** + * struct irq_data - per irq and irq chip data passed down to chip functions + * @irq: interrupt number + * @chip: low level interrupt hardware access + * @handler_data: per-IRQ data for the irq_chip methods + * @chip_data: platform-specific per-chip private data for the chip + * methods, to allow shared chip implementations + * @msi_desc: MSI descriptor + * @affinity: pointer to irq affinity mask + */ +struct irq_data { + unsigned int irq; + struct irq_chip *chip; + void *handler_data; + void *chip_data; + struct msi_desc *msi_desc; +#ifdef CONFIG_SMP + cpumask_var_t *affinity; +#endif +}; + +/** * struct irq_chip - hardware interrupt chip descriptor * * @name: name for /proc/interrupts @@ -146,10 +167,7 @@ struct irq_2_iommu; * @irq_2_iommu: iommu with this irq * @handle_irq: highlevel irq-events handler [if NULL, __do_IRQ()] * @chip: low level interrupt hardware access - * @msi_desc: MSI descriptor - * @handler_data: per-IRQ data for the irq_chip methods - * @chip_data: platform-specific per-chip private data for the chip - * methods, to allow shared chip implementations + * @irq_data: per irq and chip data passed down to chip functions * @action: the irq action chain * @status: status information * @depth: disable-depth, for nested irq_disable() calls @@ -175,9 +193,7 @@ struct irq_desc { #endif irq_flow_handler_t handle_irq; struct irq_chip *chip; - struct msi_desc *msi_desc; - void *handler_data; - void *chip_data; + struct irq_data irq_data; struct irqaction *action; /* IRQ action list */ unsigned int status; /* IRQ status */ @@ -408,18 +424,18 @@ extern int set_irq_msi(unsigned int irq, static inline void set_irq_desc_chip_data(struct irq_desc *desc, void *data) { - desc->chip_data = data; + desc->irq_data.chip_data = data; } #define get_irq_chip(irq) (irq_to_desc(irq)->chip) -#define get_irq_chip_data(irq) (irq_to_desc(irq)->chip_data) -#define get_irq_data(irq) (irq_to_desc(irq)->handler_data) -#define get_irq_msi(irq) (irq_to_desc(irq)->msi_desc) - -#define get_irq_desc_chip(desc) ((desc)->chip) -#define get_irq_desc_chip_data(desc) ((desc)->chip_data) -#define get_irq_desc_data(desc) ((desc)->handler_data) -#define get_irq_desc_msi(desc) ((desc)->msi_desc) +#define get_irq_chip_data(irq) (irq_to_desc(irq)->irq_data.chip_data) +#define get_irq_data(irq) (irq_to_desc(irq)->irq_data.handler_data) +#define get_irq_msi(irq) (irq_to_desc(irq)->irq_data.msi_desc) + +#define get_irq_desc_chip(desc) ((desc)->irq_data.chip) +#define get_irq_desc_chip_data(desc) ((desc)->irq_data.chip_data) +#define get_irq_desc_data(desc) ((desc)->irq_data.handler_data) +#define get_irq_desc_msi(desc) ((desc)->irq_data.msi_desc) #endif /* CONFIG_GENERIC_HARDIRQS */ Index: linux-2.6-tip/kernel/irq/chip.c =================================================================== --- linux-2.6-tip.orig/kernel/irq/chip.c +++ linux-2.6-tip/kernel/irq/chip.c @@ -33,12 +33,13 @@ static void dynamic_irq_init_x(unsigned raw_spin_lock_irqsave(&desc->lock, flags); desc->status = IRQ_DISABLED; desc->chip = &no_irq_chip; + desc->irq_data.chip = &no_irq_chip; desc->handle_irq = handle_bad_irq; desc->depth = 1; - desc->msi_desc = NULL; - desc->handler_data = NULL; + desc->irq_data.msi_desc = NULL; + desc->irq_data.handler_data = NULL; if (!keep_chip_data) - desc->chip_data = NULL; + desc->irq_data.chip_data = NULL; desc->action = NULL; desc->irq_count = 0; desc->irqs_unhandled = 0; @@ -88,12 +89,13 @@ static void dynamic_irq_cleanup_x(unsign irq); return; } - desc->msi_desc = NULL; - desc->handler_data = NULL; + desc->irq_data.msi_desc = NULL; + desc->irq_data.handler_data = NULL; if (!keep_chip_data) - desc->chip_data = NULL; + desc->irq_data.chip_data = NULL; desc->handle_irq = handle_bad_irq; desc->chip = &no_irq_chip; + desc->irq_data.chip = &no_irq_chip; desc->name = NULL; clear_kstat_irqs(desc); raw_spin_unlock_irqrestore(&desc->lock, flags); @@ -141,6 +143,7 @@ int set_irq_chip(unsigned int irq, struc raw_spin_lock_irqsave(&desc->lock, flags); irq_chip_set_defaults(chip); desc->chip = chip; + desc->irq_data.chip = chip; raw_spin_unlock_irqrestore(&desc->lock, flags); return 0; @@ -193,7 +196,7 @@ int set_irq_data(unsigned int irq, void } raw_spin_lock_irqsave(&desc->lock, flags); - desc->handler_data = data; + desc->irq_data.handler_data = data; raw_spin_unlock_irqrestore(&desc->lock, flags); return 0; } @@ -218,7 +221,7 @@ int set_irq_msi(unsigned int irq, struct } raw_spin_lock_irqsave(&desc->lock, flags); - desc->msi_desc = entry; + desc->irq_data.msi_desc = entry; if (entry) entry->irq = irq; raw_spin_unlock_irqrestore(&desc->lock, flags); @@ -249,7 +252,7 @@ int set_irq_chip_data(unsigned int irq, } raw_spin_lock_irqsave(&desc->lock, flags); - desc->chip_data = data; + desc->irq_data.chip_data = data; raw_spin_unlock_irqrestore(&desc->lock, flags); return 0; @@ -685,6 +688,7 @@ __set_irq_handler(unsigned int irq, irq_ * dummy_irq_chip for easy transition. */ desc->chip = &dummy_irq_chip; + desc->irq_data.chip = &dummy_irq_chip; } chip_bus_lock(irq, desc); Index: linux-2.6-tip/kernel/irq/handle.c =================================================================== --- linux-2.6-tip.orig/kernel/irq/handle.c +++ linux-2.6-tip/kernel/irq/handle.c @@ -106,8 +106,11 @@ static void init_one_irq_desc(int irq, s raw_spin_lock_init(&desc->lock); desc->irq = irq; + desc->irq_data.irq = irq; + desc->irq_data.chip = desc->chip; #ifdef CONFIG_SMP desc->node = node; + desc->irq_data.affinity = &desc->affinity; #endif lockdep_set_class(&desc->lock, &irq_desc_lock_class); init_kstat_irqs(desc, node, nr_cpu_ids); @@ -185,8 +188,11 @@ int __init early_irq_init(void) for (i = 0; i < legacy_count; i++) { desc[i].irq = i; + desc[i].irq_data.irq = i; + desc[i].irq_data.chip = desc[i].chip; #ifdef CONFIG_SMP desc[i].node = node; + desc[i].irq_data.affinity = &desc[i].affinity; #endif desc[i].kstat_irqs = kstat_irqs_legacy + i * nr_cpu_ids; lockdep_set_class(&desc[i].lock, &irq_desc_lock_class); @@ -265,6 +271,11 @@ int __init early_irq_init(void) for (i = 0; i < count; i++) { desc[i].irq = i; + desc[i].irq_data.irq = i; + desc[i].irq_data.chip = desc[i].chip; +#ifdef CONFIG_SMP + desc[i].irq_data.affinity = &desc[i].affinity; +#endif alloc_desc_masks(&desc[i], 0, true); init_desc_masks(&desc[i]); desc[i].kstat_irqs = kstat_irqs_all[i]; -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html