KVM: ppc: optimize find first bit

Since we use a unsigned long here anyway we can use the optimized __ffs.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index b285e3d32466..0f064719162c 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -222,7 +222,7 @@ void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
         unsigned int exception;
         unsigned int priority;
 
-        priority = find_first_bit(pending, BITS_PER_BYTE * sizeof(*pending));
+        priority = __ffs(*pending);
         while (priority <= BOOKE_MAX_INTERRUPT) {
                 exception = priority_exception[priority];
                 if (kvmppc_can_deliver_interrupt(vcpu, exception)) {