From: Hollis Blanchard <hollisb@us.ibm.com>
To: avi@redhat.com
Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org
Subject: [PATCH 12 of 14] kvm: ppc: optimize find first bit
Date: Wed, 05 Nov 2008 09:36:22 -0600 [thread overview]
Message-ID: <0f72dc03ee976363ca8d.1225899382@localhost.localdomain> (raw)
In-Reply-To: <patchbomb.1225899370@localhost.localdomain>
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>
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -222,7 +222,7 @@ void kvmppc_core_deliver_interrupts(stru
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)) {
next prev parent reply other threads:[~2008-11-05 15:36 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-05 15:36 [PATCH 00 of 14] Kernel updates for PowerPC KVM Hollis Blanchard
2008-11-05 15:36 ` [PATCH 01 of 14] kvm: ppc: Move 440-specific TLB code into 44x_tlb.c Hollis Blanchard
2008-11-05 15:36 ` [PATCH 02 of 14] kvm: ppc: Rename "struct tlbe" to "struct kvmppc_44x_tlbe" Hollis Blanchard
2008-11-05 15:36 ` [PATCH 03 of 14] KVM: ppc: combine booke_guest.c and booke_host.c Hollis Blanchard
2008-11-05 15:36 ` [PATCH 04 of 14] KVM: ppc: Refactor powerpc.c to relocate 440-specific code Hollis Blanchard
2008-11-05 15:36 ` [PATCH 05 of 14] ppc: Create disassemble.h to extract instruction fields Hollis Blanchard
2008-11-05 15:36 ` [PATCH 06 of 14] KVM: ppc: refactor instruction emulation into generic and core-specific pieces Hollis Blanchard
2008-11-05 15:36 ` [PATCH 07 of 14] kvm: ppc: Move the last bits of 44x code out of booke.c Hollis Blanchard
2008-11-05 15:36 ` [PATCH 08 of 14] kvm: ppc: create struct kvm_vcpu_44x and introduce container_of() accessor Hollis Blanchard
2008-11-05 15:36 ` [PATCH 09 of 14] kvm: ppc: adjust vcpu types to support 64-bit cores Hollis Blanchard
2008-11-05 15:36 ` [PATCH 10 of 14] [PATCH] kvmppc: fix set regs to take care of msr change Hollis Blanchard
2008-11-05 15:36 ` [PATCH 11 of 14] kvm: ppc: optimize kvm stat handling Hollis Blanchard
2008-11-05 15:36 ` Hollis Blanchard [this message]
2008-11-05 15:36 ` [PATCH 13 of 14] kvm: ppc: optimize irq delivery path Hollis Blanchard
2008-11-05 15:36 ` [PATCH 14 of 14] kvm: ppc: improve trap emulation Hollis Blanchard
[not found] ` <patchbomb.1225899370-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2008-11-06 9:12 ` [PATCH 00 of 14] Kernel updates for PowerPC KVM Avi Kivity
2008-11-06 9:12 ` Avi Kivity
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