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xen/multicalls: add unlikely around slowpath in __xen_mc_entry()

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Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge 2010-12-17 17:20:25 -08:00
parent ffc78767f2
commit 4a7b005dbf
1 changed files with 2 additions and 2 deletions
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4
arch/x86/xen/multicalls.c
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@ -123,8 +123,8 @@ struct multicall_space __xen_mc_entry(size_t args)
BUG_ON(preemptible());
BUG_ON(b->argidx >= MC_ARGS);
if (b->mcidx == MC_BATCH ||
(argidx + args) >= MC_ARGS) {
if (unlikely(b->mcidx == MC_BATCH ||
(argidx + args) >= MC_ARGS)) {
trace_xen_mc_flush_reason((b->mcidx == MC_BATCH) ?
XEN_MC_FL_BATCH : XEN_MC_FL_ARGS);
xen_mc_flush();