xen/x86: Move irq allocation from Xen smp_op.cpu_up()

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Commit ce0d3c0a6f ("genirq: Revert sparse irq locking around
__cpu_up() and move it to x86 for now") reverted irq locking
introduced by commit a899418167 ("hotplug: Prevent alloc/free
of irq descriptors during cpu up/down") because of Xen allocating
irqs in both of its cpu_up ops.

We can move those allocations into CPU notifiers so that original
patch can be reinstated.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

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Boris Ostrovsky 2016-08-03 13:22:27 -04:00 • committed by David Vrabel

parent fa8410b355

commit 5fc509bc2b

3 changed files with 63 additions and 56 deletions

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61

arch/x86/xen/enlighten.c

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45

arch/x86/xen/smp.c

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13

arch/x86/xen/smp.h

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