From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755058AbYLIUYD (ORCPT ); Tue, 9 Dec 2008 15:24:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754706AbYLIUXI (ORCPT ); Tue, 9 Dec 2008 15:23:08 -0500 Received: from mx2.redhat.com ([66.187.237.31]:34839 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754571AbYLIUXG (ORCPT ); Tue, 9 Dec 2008 15:23:06 -0500 From: Avi Kivity To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Hollis Blanchard Subject: [PATCH 04/44] KVM: ppc: optimize find first bit Date: Tue, 9 Dec 2008 22:22:19 +0200 Message-Id: <1228854179-23002-5-git-send-email-avi@redhat.com> In-Reply-To: <1228854179-23002-1-git-send-email-avi@redhat.com> References: <1228854179-23002-1-git-send-email-avi@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hollis Blanchard Since we use a unsigned long here anyway we can use the optimized __ffs. Signed-off-by: Christian Ehrhardt Signed-off-by: Hollis Blanchard Signed-off-by: Avi Kivity --- arch/powerpc/kvm/booke.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index b285e3d..0f06471 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)) { -- 1.6.0.3