xen/pciback: use mutex rather than spinlock in passthrough backend

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To accommodate the call to the callback function from
__xen_pcibk_publish_pci_roots(), which so far dropped and the re-
acquired the lock without checking that the list didn't actually
change, convert the code to use a mutex instead (observing that the
code taking the lock won't ever get called from non-sleepable
context).

As a result, drop the bogus use of list_for_each_entry_safe() and
remove the inappropriate dropping of the lock.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

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Jan Beulich 2011-09-19 17:32:15 +01:00 • committed by Konrad Rzeszutek Wilk

parent 5fa99911a3

commit 04df355227

1 changed files with 13 additions and 19 deletions

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drivers/xen/xen-pciback/passthrough.c

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