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Subject[PATCH] kvm/eventfd:do wildcard calculation before list_for_each_entry_safe
Date
There is no need to calculate wildcard in each loop
since wildcard is not changed.

Signed-off-by: Yi Li <yili@winhong.com>
---
virt/kvm/eventfd.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index d6408bb497dc..c2323c27a28b 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -853,15 +853,17 @@ kvm_deassign_ioeventfd_idx(struct kvm *kvm, enum kvm_bus bus_idx,
struct eventfd_ctx *eventfd;
struct kvm_io_bus *bus;
int ret = -ENOENT;
+ bool wildcard;

eventfd = eventfd_ctx_fdget(args->fd);
if (IS_ERR(eventfd))
return PTR_ERR(eventfd);

+ wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH);
+
mutex_lock(&kvm->slots_lock);

list_for_each_entry_safe(p, tmp, &kvm->ioeventfds, list) {
- bool wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH);

if (p->bus_idx != bus_idx ||
p->eventfd != eventfd ||
--
2.25.3


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