xen: allow interrupts to be enabled while doing a blocking spin

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If spin_lock is called in an interrupts-enabled context, we can safely
enable interrupts while spinning.  We don't bother for the actual spin
loop, but if we timeout and fall back to blocking, it's definitely
worthwhile enabling interrupts if possible.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Jeremy Fitzhardinge 2008-08-20 17:02:20 -07:00 • committed by Ingo Molnar

parent 994025caba

commit 1e696f638b

1 changed files with 27 additions and 3 deletions

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arch/x86/xen/spinlock.c

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