6.7-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christian Brauner brauner@kernel.org
[ Upstream commit 3652117f854819a148ff0fbe4492587d3520b5e5 ]
Ever since the eventfd 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.
Link: https://lore.kernel.org/r/20231122-vfs-eventfd-signal-v2-2-bd549b14ce0c@kern... Acked-by: Xu Yilun yilun.xu@intel.com Acked-by: Andrew Donnellan ajd@linux.ibm.com # ocxl Acked-by: Eric Farman farman@linux.ibm.com # s390 Reviewed-by: Jan Kara jack@suse.cz Reviewed-by: Jens Axboe axboe@kernel.dk Signed-off-by: Christian Brauner brauner@kernel.org Stable-dep-of: 675daf435e9f ("vfio/platform: Create persistent IRQ handlers") Signed-off-by: Sasha Levin sashal@kernel.org --- 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/drm_syncobj.c | 6 +++--- 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 +- drivers/xen/privcmd.c | 2 +- fs/aio.c | 2 +- fs/eventfd.c | 11 ++++------- include/linux/eventfd.h | 4 ++-- mm/memcontrol.c | 10 +++++----- mm/vmpressure.c | 2 +- samples/vfio-mdev/mtty.c | 4 ++-- virt/kvm/eventfd.c | 4 ++-- 30 files changed, 61 insertions(+), 64 deletions(-)
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 238afd7335e46..4943f6b2bbee4 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2388,7 +2388,7 @@ 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 50218f3fc1703..c069521f249ec 100644 --- a/arch/x86/kvm/xen.c +++ b/arch/x86/kvm/xen.c @@ -2088,7 +2088,7 @@ 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 9290d43745519..83821e1757539 100644 --- a/drivers/accel/habanalabs/common/device.c +++ b/drivers/accel/habanalabs/common/device.c @@ -2047,7 +2047,7 @@ 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 dd7a783d53b5f..e73f88050f08d 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/drm_syncobj.c b/drivers/gpu/drm/drm_syncobj.c index 5860428da8de8..f0bdcfc0c2e74 100644 --- a/drivers/gpu/drm/drm_syncobj.c +++ b/drivers/gpu/drm/drm_syncobj.c @@ -1367,7 +1367,7 @@ static void syncobj_eventfd_entry_fence_func(struct dma_fence *fence, struct syncobj_eventfd_entry *entry = container_of(cb, struct syncobj_eventfd_entry, fence_cb);
- eventfd_signal(entry->ev_fd_ctx, 1); + eventfd_signal(entry->ev_fd_ctx); syncobj_eventfd_entry_free(entry); }
@@ -1401,13 +1401,13 @@ syncobj_eventfd_entry_func(struct drm_syncobj *syncobj, entry->fence = fence;
if (entry->flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) { - eventfd_signal(entry->ev_fd_ctx, 1); + eventfd_signal(entry->ev_fd_ctx); syncobj_eventfd_entry_free(entry); } else { ret = dma_fence_add_callback(fence, &entry->fence_cb, syncobj_eventfd_entry_fence_func); if (ret == -ENOENT) { - eventfd_signal(entry->ev_fd_ctx, 1); + eventfd_signal(entry->ev_fd_ctx); syncobj_eventfd_entry_free(entry); } } diff --git a/drivers/gpu/drm/i915/gvt/interrupt.c b/drivers/gpu/drm/i915/gvt/interrupt.c index b32ba5f2b240e..c8e7dfc9f7910 100644 --- a/drivers/gpu/drm/i915/gvt/interrupt.c +++ b/drivers/gpu/drm/i915/gvt/interrupt.c @@ -453,7 +453,7 @@ static void inject_virtual_interrupt(struct intel_vgpu *vgpu) if (!test_bit(INTEL_VGPU_STATUS_ATTACHED, vgpu->status)) return; if (vgpu->msi_trigger) - eventfd_signal(vgpu->msi_trigger, 1); + eventfd_signal(vgpu->msi_trigger); }
static void propagate_event(struct intel_gvt_irq *irq, diff --git a/drivers/infiniband/hw/mlx5/devx.c b/drivers/infiniband/hw/mlx5/devx.c index 6e19974ecf6e7..253fea374a72d 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 ac69b7f361f5b..7eb74711ac968 100644 --- a/drivers/misc/ocxl/file.c +++ b/drivers/misc/ocxl/file.c @@ -184,7 +184,7 @@ 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 d3f3a611f95b4..38c176cf62957 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 43601816ea4e4..bfb35cfce1ef1 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 cba4971618ff6..ea532a8a4a0c2 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 d6ea2fd4c2a02..76429585c1bc9 100644 --- a/drivers/s390/crypto/vfio_ap_ops.c +++ b/drivers/s390/crypto/vfio_ap_ops.c @@ -1862,7 +1862,7 @@ 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 efe3e3b857695..fdd0fc7b8f259 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); @@ -2738,7 +2738,7 @@ 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 0ddd4b8abecb3..6cb5ce4a8b9af 100644 --- a/drivers/vdpa/vdpa_user/vduse_dev.c +++ b/drivers/vdpa/vdpa_user/vduse_dev.c @@ -493,7 +493,7 @@ 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: @@ -911,7 +911,7 @@ 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); @@ -960,7 +960,7 @@ 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 c51229fccbd6a..d62fbfff20b82 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 1929103ee59a3..1cbc990d42e07 100644 --- a/drivers/vfio/pci/vfio_pci_core.c +++ b/drivers/vfio/pci/vfio_pci_core.c @@ -443,7 +443,7 @@ 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); @@ -1883,7 +1883,7 @@ 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"); @@ -2302,7 +2302,7 @@ 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 6fccbeb4b94f5..75c85eec21b3c 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); } }
@@ -367,7 +367,7 @@ static irqreturn_t vfio_msihandler(int irq, void *arg) { struct eventfd_ctx *trigger = arg;
- eventfd_signal(trigger, 1); + eventfd_signal(trigger); return IRQ_HANDLED; }
@@ -714,11 +714,11 @@ 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; @@ -732,7 +732,7 @@ 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; @@ -747,7 +747,7 @@ 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 d36c4cd0fbda3..e5dcada9e86c4 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 da7ec77cdaff0..173beda74b38c 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -178,7 +178,7 @@ 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; } @@ -189,7 +189,7 @@ 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 e0c181ad17e31..045f666b4f12a 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -2248,7 +2248,7 @@ 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; } } @@ -2271,7 +2271,7 @@ 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; } @@ -2289,7 +2289,7 @@ 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; } @@ -2715,7 +2715,7 @@ 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; } @@ -2763,7 +2763,7 @@ 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 f60d5f7bef944..9e942fcda5c3f 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 ac4037e9f947e..4e845c6ca0b57 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/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index 0eb337a8ec0fa..35b6e306026a4 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -1147,7 +1147,7 @@ static irqreturn_t ioeventfd_interrupt(int irq, void *dev_id) if (ioreq->addr == kioeventfd->addr + VIRTIO_MMIO_QUEUE_NOTIFY && ioreq->size == kioeventfd->addr_len && (ioreq->data & QUEUE_NOTIFY_VQ_MASK) == kioeventfd->vq) { - eventfd_signal(kioeventfd->eventfd, 1); + eventfd_signal(kioeventfd->eventfd); state = STATE_IORESP_READY; break; } diff --git a/fs/aio.c b/fs/aio.c index 3235d4e6cc623..ce939d3862161 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -1173,7 +1173,7 @@ 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 33a918f9566c3..d2f7d2d8a3511 100644 --- a/fs/eventfd.c +++ b/fs/eventfd.c @@ -72,22 +72,19 @@ __u64 eventfd_signal_mask(struct eventfd_ctx *ctx, __u64 n, __poll_t mask) }
/** - * eventfd_signal - Adds @n to the eventfd counter. + * eventfd_signal - Increment the event 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 b9d83652c097a..5620894315514 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 792fb3a5ce3b9..27c9f451d40dd 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4379,7 +4379,7 @@ 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++; @@ -4391,7 +4391,7 @@ 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; @@ -4431,7 +4431,7 @@ 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; @@ -4650,7 +4650,7 @@ 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; @@ -4942,7 +4942,7 @@ 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 22c6689d93027..bd5183dfd8791 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 69ba0281f9e0b..2284b37512402 100644 --- a/samples/vfio-mdev/mtty.c +++ b/samples/vfio-mdev/mtty.c @@ -234,10 +234,10 @@ static void mtty_trigger_interrupt(struct mdev_state *mdev_state)
if (is_msi(mdev_state)) { if (mdev_state->msi_evtfd) - eventfd_signal(mdev_state->msi_evtfd, 1); + eventfd_signal(mdev_state->msi_evtfd); } else if (is_intx(mdev_state)) { if (mdev_state->intx_evtfd && !mdev_state->intx_mask) { - eventfd_signal(mdev_state->intx_evtfd, 1); + eventfd_signal(mdev_state->intx_evtfd); mdev_state->intx_mask = true; } } diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index 89912a17f5d57..c0e230f4c3e93 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; }