genirq: Remove the now unused sparse irq leftovers
The move_irq_desc() function was only used due to the problem that the allocator did not free the old descriptors. So the descriptors had to be moved in create_irq_nr(). That's history. The code would have never been able to move active interrupt descriptors on affinity settings. That can be done in a completely different way w/o all this horror. Remove all of it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner
Родитель
b7b29338dc
Коммит
78f90d91f3
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@ -82,24 +82,16 @@ struct irq_desc {
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const char *name;
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} ____cacheline_internodealigned_in_smp;
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extern void arch_init_copy_chip_data(struct irq_desc *old_desc,
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struct irq_desc *desc, int node);
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extern void arch_free_chip_data(struct irq_desc *old_desc, struct irq_desc *desc);
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#ifndef CONFIG_SPARSE_IRQ
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extern struct irq_desc irq_desc[NR_IRQS];
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#endif
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#ifdef CONFIG_NUMA_IRQ_DESC
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extern struct irq_desc *move_irq_desc(struct irq_desc *old_desc, int node);
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#else
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/* Will be removed once the last users in power and sh are gone */
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extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node);
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static inline struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
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{
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return desc;
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}
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#endif
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extern struct irq_desc *irq_to_desc_alloc_node(unsigned int irq, int node);
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#ifdef CONFIG_GENERIC_HARDIRQS
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@ -26,11 +26,6 @@ config GENERIC_IRQ_PROBE
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config GENERIC_PENDING_IRQ
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def_bool n
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if SPARSE_IRQ && NUMA
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config NUMA_IRQ_DESC
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def_bool n
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endif
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config AUTO_IRQ_AFFINITY
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def_bool n
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@ -3,5 +3,4 @@ obj-y := irqdesc.o handle.o manage.o spurious.o resend.o chip.o dummychip.o devr
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obj-$(CONFIG_GENERIC_IRQ_PROBE) += autoprobe.o
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obj-$(CONFIG_PROC_FS) += proc.o
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obj-$(CONFIG_GENERIC_PENDING_IRQ) += migration.o
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obj-$(CONFIG_NUMA_IRQ_DESC) += numa_migrate.o
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obj-$(CONFIG_PM_SLEEP) += pm.o
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@ -18,17 +18,11 @@ extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
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extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
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extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
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extern struct lock_class_key irq_desc_lock_class;
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extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
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extern raw_spinlock_t sparse_irq_lock;
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/* Resending of interrupts :*/
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void check_irq_resend(struct irq_desc *desc, unsigned int irq);
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#ifdef CONFIG_SPARSE_IRQ
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void replace_irq_desc(unsigned int irq, struct irq_desc *desc);
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#endif
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#ifdef CONFIG_PROC_FS
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extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
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extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
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@ -110,99 +104,3 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
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#undef P
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/* Stuff below will be cleaned up after the sparse allocator is done */
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#ifdef CONFIG_SMP
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/**
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* alloc_desc_masks - allocate cpumasks for irq_desc
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* @desc: pointer to irq_desc struct
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* @node: node which will be handling the cpumasks
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* @boot: true if need bootmem
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*
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* Allocates affinity and pending_mask cpumask if required.
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* Returns true if successful (or not required).
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*/
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static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
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bool boot)
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{
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gfp_t gfp = GFP_ATOMIC;
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if (boot)
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gfp = GFP_NOWAIT;
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#ifdef CONFIG_CPUMASK_OFFSTACK
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if (!alloc_cpumask_var_node(&desc->irq_data.affinity, gfp, node))
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return false;
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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if (!alloc_cpumask_var_node(&desc->pending_mask, gfp, node)) {
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free_cpumask_var(desc->irq_data.affinity);
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return false;
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}
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#endif
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#endif
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return true;
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}
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static inline void init_desc_masks(struct irq_desc *desc)
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{
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cpumask_setall(desc->irq_data.affinity);
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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cpumask_clear(desc->pending_mask);
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#endif
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}
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/**
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* init_copy_desc_masks - copy cpumasks for irq_desc
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* @old_desc: pointer to old irq_desc struct
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* @new_desc: pointer to new irq_desc struct
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*
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* Insures affinity and pending_masks are copied to new irq_desc.
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* If !CONFIG_CPUMASKS_OFFSTACK the cpumasks are embedded in the
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* irq_desc struct so the copy is redundant.
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*/
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static inline void init_copy_desc_masks(struct irq_desc *old_desc,
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struct irq_desc *new_desc)
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{
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#ifdef CONFIG_CPUMASK_OFFSTACK
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cpumask_copy(new_desc->irq_data.affinity, old_desc->irq_data.affinity);
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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cpumask_copy(new_desc->pending_mask, old_desc->pending_mask);
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#endif
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#endif
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}
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static inline void free_desc_masks(struct irq_desc *old_desc,
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struct irq_desc *new_desc)
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{
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free_cpumask_var(old_desc->irq_data.affinity);
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#ifdef CONFIG_GENERIC_PENDING_IRQ
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free_cpumask_var(old_desc->pending_mask);
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#endif
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}
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#else /* !CONFIG_SMP */
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static inline bool alloc_desc_masks(struct irq_desc *desc, int node,
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bool boot)
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{
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return true;
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}
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static inline void init_desc_masks(struct irq_desc *desc)
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{
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}
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static inline void init_copy_desc_masks(struct irq_desc *old_desc,
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struct irq_desc *new_desc)
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{
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}
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static inline void free_desc_masks(struct irq_desc *old_desc,
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struct irq_desc *new_desc)
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{
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}
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#endif /* CONFIG_SMP */
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@ -20,7 +20,7 @@
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/*
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* lockdep: we want to handle all irq_desc locks as a single lock-class:
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*/
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struct lock_class_key irq_desc_lock_class;
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static struct lock_class_key irq_desc_lock_class;
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#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_HARDIRQS)
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static void __init init_irq_default_affinity(void)
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@ -90,28 +90,11 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
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int nr_irqs = NR_IRQS;
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EXPORT_SYMBOL_GPL(nr_irqs);
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DEFINE_RAW_SPINLOCK(sparse_irq_lock);
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static DEFINE_RAW_SPINLOCK(sparse_irq_lock);
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static DECLARE_BITMAP(allocated_irqs, NR_IRQS);
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#ifdef CONFIG_SPARSE_IRQ
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void __ref init_kstat_irqs(struct irq_desc *desc, int node, int nr)
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{
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void *ptr;
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ptr = kzalloc_node(nr * sizeof(*desc->kstat_irqs),
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GFP_ATOMIC, node);
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/*
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* don't overwite if can not get new one
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* init_copy_kstat_irqs() could still use old one
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*/
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if (ptr) {
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printk(KERN_DEBUG " alloc kstat_irqs on node %d\n", node);
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desc->kstat_irqs = ptr;
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}
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}
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static RADIX_TREE(irq_desc_tree, GFP_ATOMIC);
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static void irq_insert_desc(unsigned int irq, struct irq_desc *desc)
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@ -124,15 +107,6 @@ struct irq_desc *irq_to_desc(unsigned int irq)
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return radix_tree_lookup(&irq_desc_tree, irq);
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}
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void replace_irq_desc(unsigned int irq, struct irq_desc *desc)
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{
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void **ptr;
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ptr = radix_tree_lookup_slot(&irq_desc_tree, irq);
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if (ptr)
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radix_tree_replace_slot(ptr, desc);
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}
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static void delete_irq_desc(unsigned int irq)
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{
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radix_tree_delete(&irq_desc_tree, irq);
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@ -1,120 +0,0 @@
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/*
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* NUMA irq-desc migration code
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*
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* Migrate IRQ data structures (irq_desc, chip_data, etc.) over to
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* the new "home node" of the IRQ.
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*/
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#include <linux/irq.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/random.h>
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#include <linux/interrupt.h>
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#include <linux/kernel_stat.h>
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#include "internals.h"
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static void init_copy_kstat_irqs(struct irq_desc *old_desc,
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struct irq_desc *desc,
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int node, int nr)
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{
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init_kstat_irqs(desc, node, nr);
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if (desc->kstat_irqs != old_desc->kstat_irqs)
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memcpy(desc->kstat_irqs, old_desc->kstat_irqs,
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nr * sizeof(*desc->kstat_irqs));
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}
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static void free_kstat_irqs(struct irq_desc *old_desc, struct irq_desc *desc)
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{
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if (old_desc->kstat_irqs == desc->kstat_irqs)
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return;
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kfree(old_desc->kstat_irqs);
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old_desc->kstat_irqs = NULL;
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}
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static bool init_copy_one_irq_desc(int irq, struct irq_desc *old_desc,
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struct irq_desc *desc, int node)
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{
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memcpy(desc, old_desc, sizeof(struct irq_desc));
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if (!alloc_desc_masks(desc, node, false)) {
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printk(KERN_ERR "irq %d: can not get new irq_desc cpumask "
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"for migration.\n", irq);
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return false;
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}
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raw_spin_lock_init(&desc->lock);
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desc->irq_data.node = node;
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lockdep_set_class(&desc->lock, &irq_desc_lock_class);
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init_copy_kstat_irqs(old_desc, desc, node, nr_cpu_ids);
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init_copy_desc_masks(old_desc, desc);
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arch_init_copy_chip_data(old_desc, desc, node);
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return true;
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}
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static void free_one_irq_desc(struct irq_desc *old_desc, struct irq_desc *desc)
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{
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free_kstat_irqs(old_desc, desc);
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free_desc_masks(old_desc, desc);
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arch_free_chip_data(old_desc, desc);
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}
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static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc,
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int node)
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{
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struct irq_desc *desc;
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unsigned int irq;
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unsigned long flags;
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irq = old_desc->irq_data.irq;
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raw_spin_lock_irqsave(&sparse_irq_lock, flags);
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/* We have to check it to avoid races with another CPU */
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desc = irq_to_desc(irq);
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if (desc && old_desc != desc)
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goto out_unlock;
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desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
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if (!desc) {
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printk(KERN_ERR "irq %d: can not get new irq_desc "
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"for migration.\n", irq);
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/* still use old one */
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desc = old_desc;
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goto out_unlock;
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}
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if (!init_copy_one_irq_desc(irq, old_desc, desc, node)) {
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/* still use old one */
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kfree(desc);
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desc = old_desc;
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goto out_unlock;
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}
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replace_irq_desc(irq, desc);
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raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
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/* free the old one */
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free_one_irq_desc(old_desc, desc);
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kfree(old_desc);
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return desc;
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out_unlock:
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raw_spin_unlock_irqrestore(&sparse_irq_lock, flags);
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return desc;
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}
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struct irq_desc *move_irq_desc(struct irq_desc *desc, int node)
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{
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/* those static or target node is -1, do not move them */
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if (desc->irq_data.irq < NR_IRQS_LEGACY || node == -1)
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return desc;
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if (desc->irq_data.node != node)
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desc = __real_move_irq_desc(desc, node);
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return desc;
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}
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