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Tsirkin" , Jason Wang , Xuan Zhuo , linux-kernel@vger.kernel.org, kernel-team@cloudflare.com, Caleb Raitto Subject: [PATCH 1/2] virtio_pci: Don't make an extra copy of cpu affinity mask Date: Thu, 19 Oct 2023 12:16:24 +0200 Message-ID: <20231019101625.412936-1-jakub@cloudflare.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on fry.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (fry.vger.email [0.0.0.0]); Thu, 19 Oct 2023 03:16:41 -0700 (PDT) Since commit 19e226e8cc5d ("virtio: Make vp_set_vq_affinity() take a mask.") it is actually not needed to have a local copy of the cpu mask. Pass the cpu mask we got as argument to set the irq affinity hint. Cc: Caleb Raitto Signed-off-by: Jakub Sitnicki --- drivers/virtio/virtio_pci_common.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c index c2524a7207cf..8927bc338f06 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -433,21 +433,14 @@ int vp_set_vq_affinity(struct virtqueue *vq, const struct cpumask *cpu_mask) struct virtio_device *vdev = vq->vdev; struct virtio_pci_device *vp_dev = to_vp_device(vdev); struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index]; - struct cpumask *mask; unsigned int irq; if (!vq->callback) return -EINVAL; if (vp_dev->msix_enabled) { - mask = vp_dev->msix_affinity_masks[info->msix_vector]; irq = pci_irq_vector(vp_dev->pci_dev, info->msix_vector); - if (!cpu_mask) - irq_set_affinity_hint(irq, NULL); - else { - cpumask_copy(mask, cpu_mask); - irq_set_affinity_hint(irq, mask); - } + irq_set_affinity_hint(irq, cpu_mask); } return 0; } -- 2.41.0