Messages in this thread | | | From | Yinghai Lu <> | Subject | [PATCH v3 0/8] irq: core changes for x86 ioapic hotplug | Date | Mon, 5 May 2014 18:33:18 -0700 |
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Hi,
These patches are core changes for x86 ioapic hotplug support.
First part for kill old irq_reserve_irqs: During reviewing ioapic hotplug patchset, Thomas pointed out that should not extend irq_reserve_irq for that purpose as that is not actually reserve. Neet to clean up old irq_reserve_irq before introduce reserve/alloc_reserved method for ioapic hotplug. So here patchset that kill irq_reserve_irq that actually set allocated_irqs. First remove irq_reserve_irqs for x86, and remove irq_reserve_irq for sh. Then in set_irq_chip use irq_alloc_desc instead of irq_reserve_irq. Next will mark bits in allocated_irqs early for init irqs in !SPARSE_IRQ
Second parts are new reserve/alloc_reserved functions: It will introduce reserved_irqs bit maps to track reserved irqs. New irq_alloc_reserved_desc() will only allocate desc when that irq is reserved, at the same time irq_alloc_desc will only allocate desc when irq is not reserved.
Thanks
Yinghai
-v2: add new reserve/alloc_reserved sets. -v3: make irq_alloc_descs to avoid reserved irqs.
Yinghai Lu (8): x86, irq: Remove not needed irq_reserve_irqs calling sh, irq: Remove irq_reserve_irq calling irq: Use irq_alloc_desc_at instead of irq_reserve_irq s390: Mark bits in allocated_irqs in general code irq: Kill irq_reserve_irq/irq_reserve_irqs irq: Add new reserved_irqs clear/mark functions irq: Add irq_alloc_reserved_desc() irq: Do not free unallocated irq descriptors
arch/s390/kernel/irq.c | 6 +- arch/x86/kernel/apic/io_apic.c | 3 - drivers/sh/intc/core.c | 7 +- include/linux/irq.h | 13 ++-- kernel/irq/chip.c | 14 ++-- kernel/irq/irqdesc.c | 144 ++++++++++++++++++++++++++++++++++------- 6 files changed, 141 insertions(+), 46 deletions(-)
-- 1.8.4.5
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