From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20ADFEB64DD for ; Thu, 13 Jul 2023 13:30:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234738AbjGMNar (ORCPT ); Thu, 13 Jul 2023 09:30:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34542 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234409AbjGMNap (ORCPT ); Thu, 13 Jul 2023 09:30:45 -0400 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12B3EE68; Thu, 13 Jul 2023 06:30:43 -0700 (PDT) Received: from pps.filterd (m0353726.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36DDLrkB004281; Thu, 13 Jul 2023 13:30:03 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=yIjAwsQR1wLZ8Bjld9sxVuIjhZ4yn9i9x6FCVBXNkdI=; b=mm0EKyIJVnP3MW7HMgeWPwA9lkZ5fYaP0kpNzaCk4yxx2VM58hC6JtVLIoP9ptDoDJ+C fUfj7+2LEuSNYhltq92CPGP26EEOV6n3Sx85xqmeyUAqW5PNLEZTTPMA5PwOWF8/66tO g/rmtBjDGpsPOfDxraHV1HDSxx9f92lAOOf8yv0Zd1+QBa4/mgEX9V3tBM+Tjdplnbo2 y33ArriOuXZ5VfosxwUe6DPWU4enV5ZLeqNf/M8GHQnEz2w6GZHa2Fd9ykWbMN7NALNW 3dWRXtqmGGKMzYCYy+HXCd0/fJNSfdU4lXMAhLUOfkBNbvYp1i3h98qZZB3636whGHJQ 0Q== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3rtj3ar78m-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 13 Jul 2023 13:30:02 +0000 Received: from m0353726.ppops.net (m0353726.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 36DDMxou009349; Thu, 13 Jul 2023 13:30:01 GMT Received: from ppma21.wdc07v.mail.ibm.com (5b.69.3da9.ip4.static.sl-reverse.com [169.61.105.91]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3rtj3ar77b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 13 Jul 2023 13:30:01 +0000 Received: from pps.filterd (ppma21.wdc07v.mail.ibm.com [127.0.0.1]) by ppma21.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 36D743Jx011007; Thu, 13 Jul 2023 13:29:59 GMT Received: from smtprelay04.wdc07v.mail.ibm.com ([172.16.1.71]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3rqk4mk1aw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 13 Jul 2023 13:29:59 +0000 Received: from smtpav03.dal12v.mail.ibm.com (smtpav03.dal12v.mail.ibm.com [10.241.53.102]) by smtprelay04.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 36DDTwut37028342 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 13 Jul 2023 13:29:58 GMT Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DE9DB58056; Thu, 13 Jul 2023 13:29:57 +0000 (GMT) Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id ED4595803F; Thu, 13 Jul 2023 13:29:52 +0000 (GMT) Received: from [9.61.158.95] (unknown [9.61.158.95]) by smtpav03.dal12v.mail.ibm.com (Postfix) with ESMTP; Thu, 13 Jul 2023 13:29:52 +0000 (GMT) Message-ID: Date: Thu, 13 Jul 2023 09:29:52 -0400 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0 Subject: Re: [PATCH 1/2] eventfd: simplify eventfd_signal() Content-Language: en-US To: Christian Brauner , linux-fsdevel@vger.kernel.org Cc: Vitaly Kuznetsov , Sean Christopherson , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, David Woodhouse , Paul Durrant , Oded Gabbay , Wu Hao , Tom Rix , Moritz Fischer , Xu Yilun , Zhenyu Wang , Zhi Wang , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Daniel Vetter , Leon Romanovsky , Jason Gunthorpe , Frederic Barrat , Andrew Donnellan , Arnd Bergmann , Greg Kroah-Hartman , Eric Farman , Matthew Rosato , Halil Pasic , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Jason Herne , Harald Freudenberger , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , Diana Craciun , Alex Williamson , Eric Auger , Fei Li , Benjamin LaHaise , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Kirti Wankhede , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-fpga@vger.kernel.org, intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-rdma@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-usb@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-aio@kvack.org, cgroups@vger.kernel.org, linux-mm@kvack.org, Jens Axboe , Pavel Begunkov , io-uring@vger.kernel.org References: <20230713-vfs-eventfd-signal-v1-0-7fda6c5d212b@kernel.org> <20230713-vfs-eventfd-signal-v1-1-7fda6c5d212b@kernel.org> From: Anthony Krowiak In-Reply-To: <20230713-vfs-eventfd-signal-v1-1-7fda6c5d212b@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: va_EebEAOpDsN7qMG95SDcn-5a5Qwe3g X-Proofpoint-GUID: -ewp-fXzNQ4ITFG8EgqR2pY8ktrdWFdo X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-13_05,2023-07-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 phishscore=0 clxscore=1011 lowpriorityscore=0 malwarescore=0 spamscore=0 suspectscore=0 adultscore=0 mlxlogscore=999 priorityscore=1501 impostorscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307130114 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org For vfio_ap_ops.c: Reviewed-by: Tony Krowiak On 7/13/23 6:05 AM, Christian Brauner wrote: > Ever since the evenfd type was introduced back in 2007 in commit > e1ad7468c77d ("signal/timer/event: eventfd core") the eventfd_signal() > function only ever passed 1 as a value for @n. There's no point in > keeping that additional argument. > > Signed-off-by: Christian Brauner > --- > arch/x86/kvm/hyperv.c | 2 +- > arch/x86/kvm/xen.c | 2 +- > drivers/accel/habanalabs/common/device.c | 2 +- > drivers/fpga/dfl.c | 2 +- > drivers/gpu/drm/i915/gvt/interrupt.c | 2 +- > drivers/infiniband/hw/mlx5/devx.c | 2 +- > drivers/misc/ocxl/file.c | 2 +- > drivers/s390/cio/vfio_ccw_chp.c | 2 +- > drivers/s390/cio/vfio_ccw_drv.c | 4 ++-- > drivers/s390/cio/vfio_ccw_ops.c | 6 +++--- > drivers/s390/crypto/vfio_ap_ops.c | 2 +- > drivers/usb/gadget/function/f_fs.c | 4 ++-- > drivers/vdpa/vdpa_user/vduse_dev.c | 6 +++--- > drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c | 2 +- > drivers/vfio/pci/vfio_pci_core.c | 6 +++--- > drivers/vfio/pci/vfio_pci_intrs.c | 12 ++++++------ > drivers/vfio/platform/vfio_platform_irq.c | 4 ++-- > drivers/vhost/vdpa.c | 4 ++-- > drivers/vhost/vhost.c | 10 +++++----- > drivers/vhost/vhost.h | 2 +- > drivers/virt/acrn/ioeventfd.c | 2 +- > fs/aio.c | 2 +- > fs/eventfd.c | 9 +++------ > include/linux/eventfd.h | 4 ++-- > mm/memcontrol.c | 10 +++++----- > mm/vmpressure.c | 2 +- > samples/vfio-mdev/mtty.c | 4 ++-- > virt/kvm/eventfd.c | 4 ++-- > 28 files changed, 56 insertions(+), 59 deletions(-) > > diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c > index b28fd020066f..2f4bd74b482c 100644 > --- a/arch/x86/kvm/hyperv.c > +++ b/arch/x86/kvm/hyperv.c > @@ -2387,7 +2387,7 @@ static u16 kvm_hvcall_signal_event(struct kvm_vcpu *vcpu, struct kvm_hv_hcall *h > if (!eventfd) > return HV_STATUS_INVALID_PORT_ID; > > - eventfd_signal(eventfd, 1); > + eventfd_signal(eventfd); > return HV_STATUS_SUCCESS; > } > > diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c > index 40edf4d1974c..a7b62bafd57b 100644 > --- a/arch/x86/kvm/xen.c > +++ b/arch/x86/kvm/xen.c > @@ -2043,7 +2043,7 @@ static bool kvm_xen_hcall_evtchn_send(struct kvm_vcpu *vcpu, u64 param, u64 *r) > if (ret < 0 && ret != -ENOTCONN) > return false; > } else { > - eventfd_signal(evtchnfd->deliver.eventfd.ctx, 1); > + eventfd_signal(evtchnfd->deliver.eventfd.ctx); > } > > *r = 0; > diff --git a/drivers/accel/habanalabs/common/device.c b/drivers/accel/habanalabs/common/device.c > index b97339d1f7c6..30357b371d61 100644 > --- a/drivers/accel/habanalabs/common/device.c > +++ b/drivers/accel/habanalabs/common/device.c > @@ -1963,7 +1963,7 @@ static void hl_notifier_event_send(struct hl_notifier_event *notifier_event, u64 > notifier_event->events_mask |= event_mask; > > if (notifier_event->eventfd) > - eventfd_signal(notifier_event->eventfd, 1); > + eventfd_signal(notifier_event->eventfd); > > mutex_unlock(¬ifier_event->lock); > } > diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c > index dd7a783d53b5..e73f88050f08 100644 > --- a/drivers/fpga/dfl.c > +++ b/drivers/fpga/dfl.c > @@ -1872,7 +1872,7 @@ static irqreturn_t dfl_irq_handler(int irq, void *arg) > { > struct eventfd_ctx *trigger = arg; > > - eventfd_signal(trigger, 1); > + eventfd_signal(trigger); > return IRQ_HANDLED; > } > > diff --git a/drivers/gpu/drm/i915/gvt/interrupt.c b/drivers/gpu/drm/i915/gvt/interrupt.c > index 68eca023bbc6..3d9e09c2add4 100644 > --- a/drivers/gpu/drm/i915/gvt/interrupt.c > +++ b/drivers/gpu/drm/i915/gvt/interrupt.c > @@ -435,7 +435,7 @@ static int inject_virtual_interrupt(struct intel_vgpu *vgpu) > */ > if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status)) > return -ESRCH; > - if (vgpu->msi_trigger && eventfd_signal(vgpu->msi_trigger, 1) != 1) > + if (vgpu->msi_trigger && eventfd_signal(vgpu->msi_trigger) != 1) > return -EFAULT; > return 0; > } > diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c > index db5fb196c728..ad50487790ff 100644 > --- a/drivers/infiniband/hw/mlx5/devx.c > +++ b/drivers/infiniband/hw/mlx5/devx.c > @@ -2498,7 +2498,7 @@ static void dispatch_event_fd(struct list_head *fd_list, > > list_for_each_entry_rcu(item, fd_list, xa_list) { > if (item->eventfd) > - eventfd_signal(item->eventfd, 1); > + eventfd_signal(item->eventfd); > else > deliver_event(item, data); > } > diff --git a/drivers/misc/ocxl/file.c b/drivers/misc/ocxl/file.c > index 6e63f060e4cc..51766db296ab 100644 > --- a/drivers/misc/ocxl/file.c > +++ b/drivers/misc/ocxl/file.c > @@ -185,7 +185,7 @@ static irqreturn_t irq_handler(void *private) > { > struct eventfd_ctx *ev_ctx = private; > > - eventfd_signal(ev_ctx, 1); > + eventfd_signal(ev_ctx); > return IRQ_HANDLED; > } > > diff --git a/drivers/s390/cio/vfio_ccw_chp.c b/drivers/s390/cio/vfio_ccw_chp.c > index d3f3a611f95b..38c176cf6295 100644 > --- a/drivers/s390/cio/vfio_ccw_chp.c > +++ b/drivers/s390/cio/vfio_ccw_chp.c > @@ -115,7 +115,7 @@ static ssize_t vfio_ccw_crw_region_read(struct vfio_ccw_private *private, > > /* Notify the guest if more CRWs are on our queue */ > if (!list_empty(&private->crw) && private->crw_trigger) > - eventfd_signal(private->crw_trigger, 1); > + eventfd_signal(private->crw_trigger); > > return ret; > } > diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c > index 43601816ea4e..bfb35cfce1ef 100644 > --- a/drivers/s390/cio/vfio_ccw_drv.c > +++ b/drivers/s390/cio/vfio_ccw_drv.c > @@ -112,7 +112,7 @@ void vfio_ccw_sch_io_todo(struct work_struct *work) > private->state = VFIO_CCW_STATE_IDLE; > > if (private->io_trigger) > - eventfd_signal(private->io_trigger, 1); > + eventfd_signal(private->io_trigger); > } > > void vfio_ccw_crw_todo(struct work_struct *work) > @@ -122,7 +122,7 @@ void vfio_ccw_crw_todo(struct work_struct *work) > private = container_of(work, struct vfio_ccw_private, crw_work); > > if (!list_empty(&private->crw) && private->crw_trigger) > - eventfd_signal(private->crw_trigger, 1); > + eventfd_signal(private->crw_trigger); > } > > /* > diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c > index 5b53b94f13c7..3df231f6feda 100644 > --- a/drivers/s390/cio/vfio_ccw_ops.c > +++ b/drivers/s390/cio/vfio_ccw_ops.c > @@ -421,7 +421,7 @@ static int vfio_ccw_mdev_set_irqs(struct vfio_ccw_private *private, > case VFIO_IRQ_SET_DATA_NONE: > { > if (*ctx) > - eventfd_signal(*ctx, 1); > + eventfd_signal(*ctx); > return 0; > } > case VFIO_IRQ_SET_DATA_BOOL: > @@ -432,7 +432,7 @@ static int vfio_ccw_mdev_set_irqs(struct vfio_ccw_private *private, > return -EFAULT; > > if (trigger && *ctx) > - eventfd_signal(*ctx, 1); > + eventfd_signal(*ctx); > return 0; > } > case VFIO_IRQ_SET_DATA_EVENTFD: > @@ -612,7 +612,7 @@ static void vfio_ccw_mdev_request(struct vfio_device *vdev, unsigned int count) > "Relaying device request to user (#%u)\n", > count); > > - eventfd_signal(private->req_trigger, 1); > + eventfd_signal(private->req_trigger); > } else if (count == 0) { > dev_notice(dev, > "No device request channel registered, blocked until released by user\n"); > diff --git a/drivers/s390/crypto/vfio_ap_ops.c b/drivers/s390/crypto/vfio_ap_ops.c > index b441745b0418..feb88526ac9d 100644 > --- a/drivers/s390/crypto/vfio_ap_ops.c > +++ b/drivers/s390/crypto/vfio_ap_ops.c > @@ -1749,7 +1749,7 @@ static void vfio_ap_mdev_request(struct vfio_device *vdev, unsigned int count) > "Relaying device request to user (#%u)\n", > count); > > - eventfd_signal(matrix_mdev->req_trigger, 1); > + eventfd_signal(matrix_mdev->req_trigger); > } else if (count == 0) { > dev_notice(dev, > "No device request registered, blocked until released by user\n"); > diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c > index f41a385a5c42..ceb1aad0c5df 100644 > --- a/drivers/usb/gadget/function/f_fs.c > +++ b/drivers/usb/gadget/function/f_fs.c > @@ -831,7 +831,7 @@ static void ffs_user_copy_worker(struct work_struct *work) > io_data->kiocb->ki_complete(io_data->kiocb, ret); > > if (io_data->ffs->ffs_eventfd && !kiocb_has_eventfd) > - eventfd_signal(io_data->ffs->ffs_eventfd, 1); > + eventfd_signal(io_data->ffs->ffs_eventfd); > > if (io_data->read) > kfree(io_data->to_free); > @@ -2739,7 +2739,7 @@ static void __ffs_event_add(struct ffs_data *ffs, > ffs->ev.types[ffs->ev.count++] = type; > wake_up_locked(&ffs->ev.waitq); > if (ffs->ffs_eventfd) > - eventfd_signal(ffs->ffs_eventfd, 1); > + eventfd_signal(ffs->ffs_eventfd); > } > > static void ffs_event_add(struct ffs_data *ffs, > diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c > index dc38ed21319d..99b901a9e638 100644 > --- a/drivers/vdpa/vdpa_user/vduse_dev.c > +++ b/drivers/vdpa/vdpa_user/vduse_dev.c > @@ -494,7 +494,7 @@ static void vduse_vq_kick(struct vduse_virtqueue *vq) > goto unlock; > > if (vq->kickfd) > - eventfd_signal(vq->kickfd, 1); > + eventfd_signal(vq->kickfd); > else > vq->kicked = true; > unlock: > @@ -912,7 +912,7 @@ static int vduse_kickfd_setup(struct vduse_dev *dev, > eventfd_ctx_put(vq->kickfd); > vq->kickfd = ctx; > if (vq->ready && vq->kicked && vq->kickfd) { > - eventfd_signal(vq->kickfd, 1); > + eventfd_signal(vq->kickfd); > vq->kicked = false; > } > spin_unlock(&vq->kick_lock); > @@ -961,7 +961,7 @@ static bool vduse_vq_signal_irqfd(struct vduse_virtqueue *vq) > > spin_lock_irq(&vq->irq_lock); > if (vq->ready && vq->cb.trigger) { > - eventfd_signal(vq->cb.trigger, 1); > + eventfd_signal(vq->cb.trigger); > signal = true; > } > spin_unlock_irq(&vq->irq_lock); > diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c b/drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c > index c51229fccbd6..d62fbfff20b8 100644 > --- a/drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c > +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c > @@ -54,7 +54,7 @@ static irqreturn_t vfio_fsl_mc_irq_handler(int irq_num, void *arg) > { > struct vfio_fsl_mc_irq *mc_irq = (struct vfio_fsl_mc_irq *)arg; > > - eventfd_signal(mc_irq->trigger, 1); > + eventfd_signal(mc_irq->trigger); > return IRQ_HANDLED; > } > > diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c > index 20d7b69ea6ff..01c8e31db23b 100644 > --- a/drivers/vfio/pci/vfio_pci_core.c > +++ b/drivers/vfio/pci/vfio_pci_core.c > @@ -441,7 +441,7 @@ static int vfio_pci_core_runtime_resume(struct device *dev) > */ > down_write(&vdev->memory_lock); > if (vdev->pm_wake_eventfd_ctx) { > - eventfd_signal(vdev->pm_wake_eventfd_ctx, 1); > + eventfd_signal(vdev->pm_wake_eventfd_ctx); > __vfio_pci_runtime_pm_exit(vdev); > } > up_write(&vdev->memory_lock); > @@ -1861,7 +1861,7 @@ void vfio_pci_core_request(struct vfio_device *core_vdev, unsigned int count) > pci_notice_ratelimited(pdev, > "Relaying device request to user (#%u)\n", > count); > - eventfd_signal(vdev->req_trigger, 1); > + eventfd_signal(vdev->req_trigger); > } else if (count == 0) { > pci_warn(pdev, > "No device request channel registered, blocked until released by user\n"); > @@ -2280,7 +2280,7 @@ pci_ers_result_t vfio_pci_core_aer_err_detected(struct pci_dev *pdev, > mutex_lock(&vdev->igate); > > if (vdev->err_trigger) > - eventfd_signal(vdev->err_trigger, 1); > + eventfd_signal(vdev->err_trigger); > > mutex_unlock(&vdev->igate); > > diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c > index cbb4bcbfbf83..237beac83809 100644 > --- a/drivers/vfio/pci/vfio_pci_intrs.c > +++ b/drivers/vfio/pci/vfio_pci_intrs.c > @@ -94,7 +94,7 @@ static void vfio_send_intx_eventfd(void *opaque, void *unused) > ctx = vfio_irq_ctx_get(vdev, 0); > if (WARN_ON_ONCE(!ctx)) > return; > - eventfd_signal(ctx->trigger, 1); > + eventfd_signal(ctx->trigger); > } > } > > @@ -342,7 +342,7 @@ static irqreturn_t vfio_msihandler(int irq, void *arg) > { > struct eventfd_ctx *trigger = arg; > > - eventfd_signal(trigger, 1); > + eventfd_signal(trigger); > return IRQ_HANDLED; > } > > @@ -689,11 +689,11 @@ static int vfio_pci_set_msi_trigger(struct vfio_pci_core_device *vdev, > if (!ctx) > continue; > if (flags & VFIO_IRQ_SET_DATA_NONE) { > - eventfd_signal(ctx->trigger, 1); > + eventfd_signal(ctx->trigger); > } else if (flags & VFIO_IRQ_SET_DATA_BOOL) { > uint8_t *bools = data; > if (bools[i - start]) > - eventfd_signal(ctx->trigger, 1); > + eventfd_signal(ctx->trigger); > } > } > return 0; > @@ -707,7 +707,7 @@ static int vfio_pci_set_ctx_trigger_single(struct eventfd_ctx **ctx, > if (flags & VFIO_IRQ_SET_DATA_NONE) { > if (*ctx) { > if (count) { > - eventfd_signal(*ctx, 1); > + eventfd_signal(*ctx); > } else { > eventfd_ctx_put(*ctx); > *ctx = NULL; > @@ -722,7 +722,7 @@ static int vfio_pci_set_ctx_trigger_single(struct eventfd_ctx **ctx, > > trigger = *(uint8_t *)data; > if (trigger && *ctx) > - eventfd_signal(*ctx, 1); > + eventfd_signal(*ctx); > > return 0; > } else if (flags & VFIO_IRQ_SET_DATA_EVENTFD) { > diff --git a/drivers/vfio/platform/vfio_platform_irq.c b/drivers/vfio/platform/vfio_platform_irq.c > index 665197caed89..61a1bfb68ac7 100644 > --- a/drivers/vfio/platform/vfio_platform_irq.c > +++ b/drivers/vfio/platform/vfio_platform_irq.c > @@ -155,7 +155,7 @@ static irqreturn_t vfio_automasked_irq_handler(int irq, void *dev_id) > spin_unlock_irqrestore(&irq_ctx->lock, flags); > > if (ret == IRQ_HANDLED) > - eventfd_signal(irq_ctx->trigger, 1); > + eventfd_signal(irq_ctx->trigger); > > return ret; > } > @@ -164,7 +164,7 @@ static irqreturn_t vfio_irq_handler(int irq, void *dev_id) > { > struct vfio_platform_irq *irq_ctx = dev_id; > > - eventfd_signal(irq_ctx->trigger, 1); > + eventfd_signal(irq_ctx->trigger); > > return IRQ_HANDLED; > } > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index b43e8680eee8..722894a0f124 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -161,7 +161,7 @@ static irqreturn_t vhost_vdpa_virtqueue_cb(void *private) > struct eventfd_ctx *call_ctx = vq->call_ctx.ctx; > > if (call_ctx) > - eventfd_signal(call_ctx, 1); > + eventfd_signal(call_ctx); > > return IRQ_HANDLED; > } > @@ -172,7 +172,7 @@ static irqreturn_t vhost_vdpa_config_cb(void *private) > struct eventfd_ctx *config_ctx = v->config_ctx; > > if (config_ctx) > - eventfd_signal(config_ctx, 1); > + eventfd_signal(config_ctx); > > return IRQ_HANDLED; > } > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index c71d573f1c94..bee50f153c8e 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -2250,7 +2250,7 @@ int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_log *log, > len -= l; > if (!len) { > if (vq->log_ctx) > - eventfd_signal(vq->log_ctx, 1); > + eventfd_signal(vq->log_ctx); > return 0; > } > } > @@ -2273,7 +2273,7 @@ static int vhost_update_used_flags(struct vhost_virtqueue *vq) > log_used(vq, (used - (void __user *)vq->used), > sizeof vq->used->flags); > if (vq->log_ctx) > - eventfd_signal(vq->log_ctx, 1); > + eventfd_signal(vq->log_ctx); > } > return 0; > } > @@ -2291,7 +2291,7 @@ static int vhost_update_avail_event(struct vhost_virtqueue *vq) > log_used(vq, (used - (void __user *)vq->used), > sizeof *vhost_avail_event(vq)); > if (vq->log_ctx) > - eventfd_signal(vq->log_ctx, 1); > + eventfd_signal(vq->log_ctx); > } > return 0; > } > @@ -2717,7 +2717,7 @@ int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads, > log_used(vq, offsetof(struct vring_used, idx), > sizeof vq->used->idx); > if (vq->log_ctx) > - eventfd_signal(vq->log_ctx, 1); > + eventfd_signal(vq->log_ctx); > } > return r; > } > @@ -2765,7 +2765,7 @@ void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq) > { > /* Signal the Guest tell them we used something up. */ > if (vq->call_ctx.ctx && vhost_notify(dev, vq)) > - eventfd_signal(vq->call_ctx.ctx, 1); > + eventfd_signal(vq->call_ctx.ctx); > } > EXPORT_SYMBOL_GPL(vhost_signal); > > diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h > index f60d5f7bef94..9e942fcda5c3 100644 > --- a/drivers/vhost/vhost.h > +++ b/drivers/vhost/vhost.h > @@ -249,7 +249,7 @@ void vhost_iotlb_map_free(struct vhost_iotlb *iotlb, > #define vq_err(vq, fmt, ...) do { \ > pr_debug(pr_fmt(fmt), ##__VA_ARGS__); \ > if ((vq)->error_ctx) \ > - eventfd_signal((vq)->error_ctx, 1);\ > + eventfd_signal((vq)->error_ctx);\ > } while (0) > > enum { > diff --git a/drivers/virt/acrn/ioeventfd.c b/drivers/virt/acrn/ioeventfd.c > index ac4037e9f947..4e845c6ca0b5 100644 > --- a/drivers/virt/acrn/ioeventfd.c > +++ b/drivers/virt/acrn/ioeventfd.c > @@ -223,7 +223,7 @@ static int acrn_ioeventfd_handler(struct acrn_ioreq_client *client, > mutex_lock(&client->vm->ioeventfds_lock); > p = hsm_ioeventfd_match(client->vm, addr, val, size, req->type); > if (p) > - eventfd_signal(p->eventfd, 1); > + eventfd_signal(p->eventfd); > mutex_unlock(&client->vm->ioeventfds_lock); > > return 0; > diff --git a/fs/aio.c b/fs/aio.c > index 77e33619de40..96cf97b19077 100644 > --- a/fs/aio.c > +++ b/fs/aio.c > @@ -1166,7 +1166,7 @@ static void aio_complete(struct aio_kiocb *iocb) > * from IRQ context. > */ > if (iocb->ki_eventfd) > - eventfd_signal(iocb->ki_eventfd, 1); > + eventfd_signal(iocb->ki_eventfd); > > /* > * We have to order our ring_info tail store above and test > diff --git a/fs/eventfd.c b/fs/eventfd.c > index 33a918f9566c..dc9e01053235 100644 > --- a/fs/eventfd.c > +++ b/fs/eventfd.c > @@ -74,20 +74,17 @@ __u64 eventfd_signal_mask(struct eventfd_ctx *ctx, __u64 n, __poll_t mask) > /** > * eventfd_signal - Adds @n to the eventfd counter. > * @ctx: [in] Pointer to the eventfd context. > - * @n: [in] Value of the counter to be added to the eventfd internal counter. > - * The value cannot be negative. > * > * This function is supposed to be called by the kernel in paths that do not > * allow sleeping. In this function we allow the counter to reach the ULLONG_MAX > * value, and we signal this as overflow condition by returning a EPOLLERR > * to poll(2). > * > - * Returns the amount by which the counter was incremented. This will be less > - * than @n if the counter has overflowed. > + * Returns the amount by which the counter was incremented. > */ > -__u64 eventfd_signal(struct eventfd_ctx *ctx, __u64 n) > +__u64 eventfd_signal(struct eventfd_ctx *ctx) > { > - return eventfd_signal_mask(ctx, n, 0); > + return eventfd_signal_mask(ctx, 1, 0); > } > EXPORT_SYMBOL_GPL(eventfd_signal); > > diff --git a/include/linux/eventfd.h b/include/linux/eventfd.h > index b9d83652c097..562089431551 100644 > --- a/include/linux/eventfd.h > +++ b/include/linux/eventfd.h > @@ -35,7 +35,7 @@ void eventfd_ctx_put(struct eventfd_ctx *ctx); > struct file *eventfd_fget(int fd); > struct eventfd_ctx *eventfd_ctx_fdget(int fd); > struct eventfd_ctx *eventfd_ctx_fileget(struct file *file); > -__u64 eventfd_signal(struct eventfd_ctx *ctx, __u64 n); > +__u64 eventfd_signal(struct eventfd_ctx *ctx); > __u64 eventfd_signal_mask(struct eventfd_ctx *ctx, __u64 n, __poll_t mask); > int eventfd_ctx_remove_wait_queue(struct eventfd_ctx *ctx, wait_queue_entry_t *wait, > __u64 *cnt); > @@ -58,7 +58,7 @@ static inline struct eventfd_ctx *eventfd_ctx_fdget(int fd) > return ERR_PTR(-ENOSYS); > } > > -static inline int eventfd_signal(struct eventfd_ctx *ctx, __u64 n) > +static inline int eventfd_signal(struct eventfd_ctx *ctx) > { > return -ENOSYS; > } > diff --git a/mm/memcontrol.c b/mm/memcontrol.c > index e8ca4bdcb03c..891550f575a1 100644 > --- a/mm/memcontrol.c > +++ b/mm/memcontrol.c > @@ -4228,7 +4228,7 @@ static void __mem_cgroup_threshold(struct mem_cgroup *memcg, bool swap) > * only one element of the array here. > */ > for (; i >= 0 && unlikely(t->entries[i].threshold > usage); i--) > - eventfd_signal(t->entries[i].eventfd, 1); > + eventfd_signal(t->entries[i].eventfd); > > /* i = current_threshold + 1 */ > i++; > @@ -4240,7 +4240,7 @@ static void __mem_cgroup_threshold(struct mem_cgroup *memcg, bool swap) > * only one element of the array here. > */ > for (; i < t->size && unlikely(t->entries[i].threshold <= usage); i++) > - eventfd_signal(t->entries[i].eventfd, 1); > + eventfd_signal(t->entries[i].eventfd); > > /* Update current_threshold */ > t->current_threshold = i - 1; > @@ -4280,7 +4280,7 @@ static int mem_cgroup_oom_notify_cb(struct mem_cgroup *memcg) > spin_lock(&memcg_oom_lock); > > list_for_each_entry(ev, &memcg->oom_notify, list) > - eventfd_signal(ev->eventfd, 1); > + eventfd_signal(ev->eventfd); > > spin_unlock(&memcg_oom_lock); > return 0; > @@ -4499,7 +4499,7 @@ static int mem_cgroup_oom_register_event(struct mem_cgroup *memcg, > > /* already in OOM ? */ > if (memcg->under_oom) > - eventfd_signal(eventfd, 1); > + eventfd_signal(eventfd); > spin_unlock(&memcg_oom_lock); > > return 0; > @@ -4791,7 +4791,7 @@ static void memcg_event_remove(struct work_struct *work) > event->unregister_event(memcg, event->eventfd); > > /* Notify userspace the event is going away. */ > - eventfd_signal(event->eventfd, 1); > + eventfd_signal(event->eventfd); > > eventfd_ctx_put(event->eventfd); > kfree(event); > diff --git a/mm/vmpressure.c b/mm/vmpressure.c > index b52644771cc4..ba4cdef37e42 100644 > --- a/mm/vmpressure.c > +++ b/mm/vmpressure.c > @@ -169,7 +169,7 @@ static bool vmpressure_event(struct vmpressure *vmpr, > continue; > if (level < ev->level) > continue; > - eventfd_signal(ev->efd, 1); > + eventfd_signal(ev->efd); > ret = true; > } > mutex_unlock(&vmpr->events_lock); > diff --git a/samples/vfio-mdev/mtty.c b/samples/vfio-mdev/mtty.c > index a60801fb8660..5edcf8d738de 100644 > --- a/samples/vfio-mdev/mtty.c > +++ b/samples/vfio-mdev/mtty.c > @@ -1028,9 +1028,9 @@ static int mtty_trigger_interrupt(struct mdev_state *mdev_state) > } > > if (mdev_state->irq_index == VFIO_PCI_MSI_IRQ_INDEX) > - ret = eventfd_signal(mdev_state->msi_evtfd, 1); > + ret = eventfd_signal(mdev_state->msi_evtfd); > else > - ret = eventfd_signal(mdev_state->intx_evtfd, 1); > + ret = eventfd_signal(mdev_state->intx_evtfd); > > #if defined(DEBUG_INTR) > pr_info("Intx triggered\n"); > diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c > index 89912a17f5d5..c0e230f4c3e9 100644 > --- a/virt/kvm/eventfd.c > +++ b/virt/kvm/eventfd.c > @@ -61,7 +61,7 @@ static void irqfd_resampler_notify(struct kvm_kernel_irqfd_resampler *resampler) > > list_for_each_entry_srcu(irqfd, &resampler->list, resampler_link, > srcu_read_lock_held(&resampler->kvm->irq_srcu)) > - eventfd_signal(irqfd->resamplefd, 1); > + eventfd_signal(irqfd->resamplefd); > } > > /* > @@ -786,7 +786,7 @@ ioeventfd_write(struct kvm_vcpu *vcpu, struct kvm_io_device *this, gpa_t addr, > if (!ioeventfd_in_range(p, addr, len, val)) > return -EOPNOTSUPP; > > - eventfd_signal(p->eventfd, 1); > + eventfd_signal(p->eventfd); > return 0; > } > >