From nobody Thu Sep 19 00:17:49 2024 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9C12214D2BD; Fri, 26 Jul 2024 21:57:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722031075; cv=none; b=Yo66nc/ajWjPjCa84P5YnzGmnD83tved560KHe0rGLgaoSffNWSWNxzMpomLsXuao5bP4Ba5+5n1BlN1HadB2/tIXPZs6vVkack+w8Zf4lP48pEWnroo0hKivDxYj60QqjpLDGSAoDhyxxrskkulTVLZORloW6fldpaEw19WSHo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722031075; c=relaxed/simple; bh=HnXNUI/k/3S9rvSe78DiEiG0bgzV5gAA+FeaTo+qPDM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rT6HvYyOIjUH1q9znK640XDDouibDDtxslT6OqVscURYt+Vr93fHNzFCSdCOBDid41oA65CnWhk3990ZhiYGhWVoktfDkz0VSGtZ+8YsYfbTRzKmFlFf8q/Fp+2DIDQ5aFoa/lOMreT4z7V52vLBIid6TWdnex1OkwOnj80Bj68= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=gp9NkUcy; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gp9NkUcy" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A0375C4AF0A; Fri, 26 Jul 2024 21:57:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722031075; bh=HnXNUI/k/3S9rvSe78DiEiG0bgzV5gAA+FeaTo+qPDM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gp9NkUcypPNM7V5p6QJ+roSHHENHbq9Qg3MY5OvwbONgaeua8cOBMpGMeEM3F8UQM e/WGlYRcpvHh3csmS6X4GAUe96Xoxn/JBHLFIfyOsji50MUe5EwCS0tMFn5964rrgY aR9zOK2wqzNyae+mzj1AeWcsyI/jP5QUXpOXhg8UNI/jIcNHCr7Xr5dj1BpXatb8NH aDSgKrJYgCg8eBjINCJkStCfZmngmOEL4PO1CAHVkuw6m5IhzW6gVKz8nYGeyg3ysz pzaK7SA276Ali6jNP48zk5DWlWTga2KZZ3vgYZuVyR0MGI1nNADjOAz1oCs9TXWTLO DPQoyUSpTu3Uw== From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , "Paul E. McKenney" , Neeraj Upadhyay , Joel Fernandes , Boqun Feng , Zqiang , rcu@vger.kernel.org, Andrew Morton , Peter Zijlstra , Thomas Gleixner Subject: [RFC PATCH 19/20] treewide: Introduce kthread_run_worker[_on_cpu]() Date: Fri, 26 Jul 2024 23:56:55 +0200 Message-ID: <20240726215701.19459-20-frederic@kernel.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240726215701.19459-1-frederic@kernel.org> References: <20240726215701.19459-1-frederic@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" kthread_create() creates a kthread without running it yet. kthread_run() creates a kthread and runs it. On the other hand, kthread_create_worker() creates a kthread worker and runs it. This difference in behaviours is confusing. Also there is no way to create a kthread worker and affine it using kthread_bind_mask() or kthread_affine_preferred() before starting it. Consolidate the behaviours and introduce kthread_run_worker[_on_cpu]() that behaves just like kthread_run(). kthread_create_worker[_on_cpu]() will now only create a kthread worker without starting it. Signed-off-by: Frederic Weisbecker --- arch/x86/kvm/i8254.c | 2 +- crypto/crypto_engine.c | 2 +- drivers/cpufreq/cppc_cpufreq.c | 2 +- drivers/gpu/drm/drm_vblank_work.c | 2 +- .../drm/i915/gem/selftests/i915_gem_context.c | 2 +- drivers/gpu/drm/i915/gt/selftest_execlists.c | 2 +- drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 2 +- drivers/gpu/drm/i915/gt/selftest_slpc.c | 2 +- drivers/gpu/drm/i915/selftests/i915_request.c | 8 ++-- drivers/gpu/drm/msm/disp/msm_disp_snapshot.c | 2 +- drivers/gpu/drm/msm/msm_atomic.c | 2 +- drivers/gpu/drm/msm/msm_gpu.c | 2 +- drivers/gpu/drm/msm/msm_kms.c | 2 +- .../platform/chips-media/wave5/wave5-vpu.c | 2 +- drivers/net/dsa/mv88e6xxx/chip.c | 2 +- drivers/net/ethernet/intel/ice/ice_dpll.c | 2 +- drivers/net/ethernet/intel/ice/ice_gnss.c | 2 +- drivers/net/ethernet/intel/ice/ice_ptp.c | 2 +- drivers/platform/chrome/cros_ec_spi.c | 2 +- drivers/ptp/ptp_clock.c | 2 +- drivers/spi/spi.c | 2 +- drivers/usb/typec/tcpm/tcpm.c | 2 +- drivers/vdpa/vdpa_sim/vdpa_sim.c | 2 +- drivers/watchdog/watchdog_dev.c | 2 +- fs/erofs/zdata.c | 2 +- include/linux/kthread.h | 48 ++++++++++++++++--- kernel/kthread.c | 31 +++--------- kernel/rcu/tree.c | 4 +- kernel/workqueue.c | 2 +- net/dsa/tag_ksz.c | 2 +- net/dsa/tag_ocelot_8021q.c | 2 +- net/dsa/tag_sja1105.c | 2 +- 32 files changed, 82 insertions(+), 65 deletions(-) diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index cd57a517d04a..d7ab8780ab9e 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -681,7 +681,7 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 fla= gs) pid_nr =3D pid_vnr(pid); put_pid(pid); =20 - pit->worker =3D kthread_create_worker(0, "kvm-pit/%d", pid_nr); + pit->worker =3D kthread_run_worker(0, "kvm-pit/%d", pid_nr); if (IS_ERR(pit->worker)) goto fail_kthread; =20 diff --git a/crypto/crypto_engine.c b/crypto/crypto_engine.c index e60a0eb628e8..c7c16da5e649 100644 --- a/crypto/crypto_engine.c +++ b/crypto/crypto_engine.c @@ -517,7 +517,7 @@ struct crypto_engine *crypto_engine_alloc_init_and_set(= struct device *dev, crypto_init_queue(&engine->queue, qlen); spin_lock_init(&engine->queue_lock); =20 - engine->kworker =3D kthread_create_worker(0, "%s", engine->name); + engine->kworker =3D kthread_run_worker(0, "%s", engine->name); if (IS_ERR(engine->kworker)) { dev_err(dev, "failed to create crypto request pump task\n"); return NULL; diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c index 15f1d41920a3..09421424b4ec 100644 --- a/drivers/cpufreq/cppc_cpufreq.c +++ b/drivers/cpufreq/cppc_cpufreq.c @@ -241,7 +241,7 @@ static void __init cppc_freq_invariance_init(void) if (fie_disabled) return; =20 - kworker_fie =3D kthread_create_worker(0, "cppc_fie"); + kworker_fie =3D kthread_run_worker(0, "cppc_fie"); if (IS_ERR(kworker_fie)) { pr_warn("%s: failed to create kworker_fie: %ld\n", __func__, PTR_ERR(kworker_fie)); diff --git a/drivers/gpu/drm/drm_vblank_work.c b/drivers/gpu/drm/drm_vblank= _work.c index 4fe9b1d3b00f..02ff12744396 100644 --- a/drivers/gpu/drm/drm_vblank_work.c +++ b/drivers/gpu/drm/drm_vblank_work.c @@ -255,7 +255,7 @@ int drm_vblank_worker_init(struct drm_vblank_crtc *vbla= nk) =20 INIT_LIST_HEAD(&vblank->pending_work); init_waitqueue_head(&vblank->work_wait_queue); - worker =3D kthread_create_worker(0, "card%d-crtc%d", + worker =3D kthread_run_worker(0, "card%d-crtc%d", vblank->dev->primary->index, vblank->pipe); if (IS_ERR(worker)) diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/driver= s/gpu/drm/i915/gem/selftests/i915_gem_context.c index 89d4dc8b60c6..eb0158e43417 100644 --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c @@ -369,7 +369,7 @@ static int live_parallel_switch(void *arg) if (!data[n].ce[0]) continue; =20 - worker =3D kthread_create_worker(0, "igt/parallel:%s", + worker =3D kthread_run_worker(0, "igt/parallel:%s", data[n].ce[0]->engine->name); if (IS_ERR(worker)) { err =3D PTR_ERR(worker); diff --git a/drivers/gpu/drm/i915/gt/selftest_execlists.c b/drivers/gpu/drm= /i915/gt/selftest_execlists.c index 4202df5b8c12..7da05fd6807f 100644 --- a/drivers/gpu/drm/i915/gt/selftest_execlists.c +++ b/drivers/gpu/drm/i915/gt/selftest_execlists.c @@ -3574,7 +3574,7 @@ static int smoke_crescendo(struct preempt_smoke *smok= e, unsigned int flags) arg[id].batch =3D NULL; arg[id].count =3D 0; =20 - worker[id] =3D kthread_create_worker(0, "igt/smoke:%d", id); + worker[id] =3D kthread_run_worker(0, "igt/smoke:%d", id); if (IS_ERR(worker[id])) { err =3D PTR_ERR(worker[id]); break; diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm= /i915/gt/selftest_hangcheck.c index 9ce8ff1c04fe..9d3aeb237295 100644 --- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c +++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c @@ -1025,7 +1025,7 @@ static int __igt_reset_engines(struct intel_gt *gt, threads[tmp].engine =3D other; threads[tmp].flags =3D flags; =20 - worker =3D kthread_create_worker(0, "igt/%s", + worker =3D kthread_run_worker(0, "igt/%s", other->name); if (IS_ERR(worker)) { err =3D PTR_ERR(worker); diff --git a/drivers/gpu/drm/i915/gt/selftest_slpc.c b/drivers/gpu/drm/i915= /gt/selftest_slpc.c index 4ecc4ae74a54..e218b229681f 100644 --- a/drivers/gpu/drm/i915/gt/selftest_slpc.c +++ b/drivers/gpu/drm/i915/gt/selftest_slpc.c @@ -489,7 +489,7 @@ static int live_slpc_tile_interaction(void *arg) return -ENOMEM; =20 for_each_gt(gt, i915, i) { - threads[i].worker =3D kthread_create_worker(0, "igt/slpc_parallel:%d", g= t->info.id); + threads[i].worker =3D kthread_run_worker(0, "igt/slpc_parallel:%d", gt->= info.id); =20 if (IS_ERR(threads[i].worker)) { ret =3D PTR_ERR(threads[i].worker); diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/dr= m/i915/selftests/i915_request.c index acae30a04a94..88870844b5bd 100644 --- a/drivers/gpu/drm/i915/selftests/i915_request.c +++ b/drivers/gpu/drm/i915/selftests/i915_request.c @@ -492,7 +492,7 @@ static int mock_breadcrumbs_smoketest(void *arg) for (n =3D 0; n < ncpus; n++) { struct kthread_worker *worker; =20 - worker =3D kthread_create_worker(0, "igt/%d", n); + worker =3D kthread_run_worker(0, "igt/%d", n); if (IS_ERR(worker)) { ret =3D PTR_ERR(worker); ncpus =3D n; @@ -1645,7 +1645,7 @@ static int live_parallel_engines(void *arg) for_each_uabi_engine(engine, i915) { struct kthread_worker *worker; =20 - worker =3D kthread_create_worker(0, "igt/parallel:%s", + worker =3D kthread_run_worker(0, "igt/parallel:%s", engine->name); if (IS_ERR(worker)) { err =3D PTR_ERR(worker); @@ -1806,7 +1806,7 @@ static int live_breadcrumbs_smoketest(void *arg) unsigned int i =3D idx * ncpus + n; struct kthread_worker *worker; =20 - worker =3D kthread_create_worker(0, "igt/%d.%d", idx, n); + worker =3D kthread_run_worker(0, "igt/%d.%d", idx, n); if (IS_ERR(worker)) { ret =3D PTR_ERR(worker); goto out_flush; @@ -3219,7 +3219,7 @@ static int perf_parallel_engines(void *arg) =20 memset(&engines[idx].p, 0, sizeof(engines[idx].p)); =20 - worker =3D kthread_create_worker(0, "igt:%s", + worker =3D kthread_run_worker(0, "igt:%s", engine->name); if (IS_ERR(worker)) { err =3D PTR_ERR(worker); diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c b/drivers/gpu/drm= /msm/disp/msm_disp_snapshot.c index e75b97127c0d..2be00b11e557 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c @@ -109,7 +109,7 @@ int msm_disp_snapshot_init(struct drm_device *drm_dev) =20 mutex_init(&kms->dump_mutex); =20 - kms->dump_worker =3D kthread_create_worker(0, "%s", "disp_snapshot"); + kms->dump_worker =3D kthread_run_worker(0, "%s", "disp_snapshot"); if (IS_ERR(kms->dump_worker)) DRM_ERROR("failed to create disp state task\n"); =20 diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_ato= mic.c index 9c45d641b521..a7a2384044ff 100644 --- a/drivers/gpu/drm/msm/msm_atomic.c +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -115,7 +115,7 @@ int msm_atomic_init_pending_timer(struct msm_pending_ti= mer *timer, timer->kms =3D kms; timer->crtc_idx =3D crtc_idx; =20 - timer->worker =3D kthread_create_worker(0, "atomic-worker-%d", crtc_idx); + timer->worker =3D kthread_run_worker(0, "atomic-worker-%d", crtc_idx); if (IS_ERR(timer->worker)) { int ret =3D PTR_ERR(timer->worker); timer->worker =3D NULL; diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index cd185b9636d2..5ce4f76ada53 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -857,7 +857,7 @@ int msm_gpu_init(struct drm_device *drm, struct platfor= m_device *pdev, gpu->funcs =3D funcs; gpu->name =3D name; =20 - gpu->worker =3D kthread_create_worker(0, "gpu-worker"); + gpu->worker =3D kthread_run_worker(0, "gpu-worker"); if (IS_ERR(gpu->worker)) { ret =3D PTR_ERR(gpu->worker); gpu->worker =3D NULL; diff --git a/drivers/gpu/drm/msm/msm_kms.c b/drivers/gpu/drm/msm/msm_kms.c index af6a6fcb1173..8db9f3afb8ac 100644 --- a/drivers/gpu/drm/msm/msm_kms.c +++ b/drivers/gpu/drm/msm/msm_kms.c @@ -269,7 +269,7 @@ int msm_drm_kms_init(struct device *dev, const struct d= rm_driver *drv) /* initialize event thread */ ev_thread =3D &priv->event_thread[drm_crtc_index(crtc)]; ev_thread->dev =3D ddev; - ev_thread->worker =3D kthread_create_worker(0, "crtc_event:%d", crtc->ba= se.id); + ev_thread->worker =3D kthread_run_worker(0, "crtc_event:%d", crtc->base.= id); if (IS_ERR(ev_thread->worker)) { ret =3D PTR_ERR(ev_thread->worker); DRM_DEV_ERROR(dev, "failed to create crtc_event kthread\n"); diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpu.c b/drivers= /media/platform/chips-media/wave5/wave5-vpu.c index 68a519ac412d..0530954563c5 100644 --- a/drivers/media/platform/chips-media/wave5/wave5-vpu.c +++ b/drivers/media/platform/chips-media/wave5/wave5-vpu.c @@ -218,7 +218,7 @@ static int wave5_vpu_probe(struct platform_device *pdev) dev_err(&pdev->dev, "failed to get irq resource, falling back to polling= \n"); hrtimer_init(&dev->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED); dev->hrtimer.function =3D &wave5_vpu_timer_callback; - dev->worker =3D kthread_create_worker(0, "vpu_irq_thread"); + dev->worker =3D kthread_run_worker(0, "vpu_irq_thread"); if (IS_ERR(dev->worker)) { dev_err(&pdev->dev, "failed to create vpu irq worker\n"); ret =3D PTR_ERR(dev->worker); diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/c= hip.c index 07c897b13de1..9df4d113af35 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -393,7 +393,7 @@ static int mv88e6xxx_irq_poll_setup(struct mv88e6xxx_ch= ip *chip) kthread_init_delayed_work(&chip->irq_poll_work, mv88e6xxx_irq_poll); =20 - chip->kworker =3D kthread_create_worker(0, "%s", dev_name(chip->dev)); + chip->kworker =3D kthread_run_worker(0, "%s", dev_name(chip->dev)); if (IS_ERR(chip->kworker)) return PTR_ERR(chip->kworker); =20 diff --git a/drivers/net/ethernet/intel/ice/ice_dpll.c b/drivers/net/ethern= et/intel/ice/ice_dpll.c index e92be6f130a3..f065a1dc0414 100644 --- a/drivers/net/ethernet/intel/ice/ice_dpll.c +++ b/drivers/net/ethernet/intel/ice/ice_dpll.c @@ -1833,7 +1833,7 @@ static int ice_dpll_init_worker(struct ice_pf *pf) struct kthread_worker *kworker; =20 kthread_init_delayed_work(&d->work, ice_dpll_periodic_work); - kworker =3D kthread_create_worker(0, "ice-dplls-%s", + kworker =3D kthread_run_worker(0, "ice-dplls-%s", dev_name(ice_pf_to_dev(pf))); if (IS_ERR(kworker)) return PTR_ERR(kworker); diff --git a/drivers/net/ethernet/intel/ice/ice_gnss.c b/drivers/net/ethern= et/intel/ice/ice_gnss.c index c8ea1af51ad3..fcd1f808b696 100644 --- a/drivers/net/ethernet/intel/ice/ice_gnss.c +++ b/drivers/net/ethernet/intel/ice/ice_gnss.c @@ -182,7 +182,7 @@ static struct gnss_serial *ice_gnss_struct_init(struct = ice_pf *pf) pf->gnss_serial =3D gnss; =20 kthread_init_delayed_work(&gnss->read_work, ice_gnss_read); - kworker =3D kthread_create_worker(0, "ice-gnss-%s", dev_name(dev)); + kworker =3D kthread_run_worker(0, "ice-gnss-%s", dev_name(dev)); if (IS_ERR(kworker)) { kfree(gnss); return NULL; diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/etherne= t/intel/ice/ice_ptp.c index fefaf52fd677..d6663876c721 100644 --- a/drivers/net/ethernet/intel/ice/ice_ptp.c +++ b/drivers/net/ethernet/intel/ice/ice_ptp.c @@ -3121,7 +3121,7 @@ static int ice_ptp_init_work(struct ice_pf *pf, struc= t ice_ptp *ptp) /* Allocate a kworker for handling work required for the ports * connected to the PTP hardware clock. */ - kworker =3D kthread_create_worker(0, "ice-ptp-%s", + kworker =3D kthread_run_worker(0, "ice-ptp-%s", dev_name(ice_pf_to_dev(pf))); if (IS_ERR(kworker)) return PTR_ERR(kworker); diff --git a/drivers/platform/chrome/cros_ec_spi.c b/drivers/platform/chrom= e/cros_ec_spi.c index 86a3d32a7763..08f566cc1480 100644 --- a/drivers/platform/chrome/cros_ec_spi.c +++ b/drivers/platform/chrome/cros_ec_spi.c @@ -715,7 +715,7 @@ static int cros_ec_spi_devm_high_pri_alloc(struct devic= e *dev, int err; =20 ec_spi->high_pri_worker =3D - kthread_create_worker(0, "cros_ec_spi_high_pri"); + kthread_run_worker(0, "cros_ec_spi_high_pri"); =20 if (IS_ERR(ec_spi->high_pri_worker)) { err =3D PTR_ERR(ec_spi->high_pri_worker); diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c index c56cd0f63909..89a4420972e7 100644 --- a/drivers/ptp/ptp_clock.c +++ b/drivers/ptp/ptp_clock.c @@ -295,7 +295,7 @@ struct ptp_clock *ptp_clock_register(struct ptp_clock_i= nfo *info, =20 if (ptp->info->do_aux_work) { kthread_init_delayed_work(&ptp->aux_work, ptp_aux_kworker); - ptp->kworker =3D kthread_create_worker(0, "ptp%d", ptp->index); + ptp->kworker =3D kthread_run_worker(0, "ptp%d", ptp->index); if (IS_ERR(ptp->kworker)) { err =3D PTR_ERR(ptp->kworker); pr_err("failed to create ptp aux_worker %d\n", err); diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index fc13fa192189..0a4b9b634631 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -2072,7 +2072,7 @@ static int spi_init_queue(struct spi_controller *ctlr) ctlr->busy =3D false; ctlr->queue_empty =3D true; =20 - ctlr->kworker =3D kthread_create_worker(0, dev_name(&ctlr->dev)); + ctlr->kworker =3D kthread_run_worker(0, dev_name(&ctlr->dev)); if (IS_ERR(ctlr->kworker)) { dev_err(&ctlr->dev, "failed to create message pump kworker\n"); return PTR_ERR(ctlr->kworker); diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 5d4da962acc8..81ca212ed495 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -7558,7 +7558,7 @@ struct tcpm_port *tcpm_register_port(struct device *d= ev, struct tcpc_dev *tcpc) mutex_init(&port->lock); mutex_init(&port->swap_lock); =20 - port->wq =3D kthread_create_worker(0, dev_name(dev)); + port->wq =3D kthread_run_worker(0, dev_name(dev)); if (IS_ERR(port->wq)) return ERR_CAST(port->wq); sched_set_fifo(port->wq->task); diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_= sim.c index 8ffea8430f95..c204fc8e471a 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c @@ -229,7 +229,7 @@ struct vdpasim *vdpasim_create(struct vdpasim_dev_attr = *dev_attr, dev =3D &vdpasim->vdpa.dev; =20 kthread_init_work(&vdpasim->work, vdpasim_work_fn); - vdpasim->worker =3D kthread_create_worker(0, "vDPA sim worker: %s", + vdpasim->worker =3D kthread_run_worker(0, "vDPA sim worker: %s", dev_attr->name); if (IS_ERR(vdpasim->worker)) goto err_iommu; diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_de= v.c index e2bd266b1b5b..ed4566997459 100644 --- a/drivers/watchdog/watchdog_dev.c +++ b/drivers/watchdog/watchdog_dev.c @@ -1229,7 +1229,7 @@ int __init watchdog_dev_init(void) { int err; =20 - watchdog_kworker =3D kthread_create_worker(0, "watchdogd"); + watchdog_kworker =3D kthread_run_worker(0, "watchdogd"); if (IS_ERR(watchdog_kworker)) { pr_err("Failed to create watchdog kworker\n"); return PTR_ERR(watchdog_kworker); diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index f1ccdf47585b..cf108812c284 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -356,7 +356,7 @@ static void erofs_destroy_percpu_workers(void) static struct kthread_worker *erofs_init_percpu_worker(int cpu) { struct kthread_worker *worker =3D - kthread_create_worker_on_cpu(cpu, 0, "erofs_worker/%u"); + kthread_run_worker_on_cpu(cpu, 0, "erofs_worker/%u"); =20 if (IS_ERR(worker)) return worker; diff --git a/include/linux/kthread.h b/include/linux/kthread.h index 0c66e7c1092a..8d27403888ce 100644 --- a/include/linux/kthread.h +++ b/include/linux/kthread.h @@ -193,19 +193,53 @@ struct kthread_worker *kthread_create_worker_on_node(= unsigned int flags, const char namefmt[], ...); =20 #define kthread_create_worker(flags, namefmt, ...) \ -({ \ - struct kthread_worker *__kw \ - =3D kthread_create_worker_on_node(flags, NUMA_NO_NODE, \ - namefmt, ## __VA_ARGS__); \ - if (!IS_ERR(__kw)) \ - wake_up_process(__kw->task); \ - __kw; \ + kthread_create_worker_on_node(flags, NUMA_NO_NODE, namefmt, ## __VA_ARGS_= _); + +/** + * kthread_run_worker - create and wake a kthread worker. + * @flags: flags modifying the default behavior of the worker + * @namefmt: printf-style name for the thread. + * + * Description: Convenient wrapper for kthread_create_worker() followed by + * wake_up_process(). Returns the kthread_worker or ERR_PTR(-ENOMEM). + */ +#define kthread_run_worker(flags, namefmt, ...) \ +({ \ + struct kthread_worker *__kw \ + =3D kthread_create_worker(flags, namefmt, ## __VA_ARGS__); \ + if (!IS_ERR(__kw)) \ + wake_up_process(__kw->task); \ + __kw; \ }) =20 struct kthread_worker * kthread_create_worker_on_cpu(int cpu, unsigned int flags, const char namefmt[]); =20 +/** + * kthread_run_worker_on_cpu - create and wake a cpu bound kthread worker. + * @cpu: CPU number + * @flags: flags modifying the default behavior of the worker + * @namefmt: printf-style name for the thread. Format is restricted + * to "name.*%u". Code fills in cpu number. + * + * Description: Convenient wrapper for kthread_create_worker_on_cpu() + * followed by wake_up_process(). Returns the kthread_worker or + * ERR_PTR(-ENOMEM). + */ +static inline struct kthread_worker * +kthread_run_worker_on_cpu(int cpu, unsigned int flags, + const char namefmt[]) +{ + struct kthread_worker *kw; + + kw =3D kthread_create_worker_on_cpu(cpu, flags, namefmt); + if (!IS_ERR(kw)) + wake_up_process(kw->task); + + return kw; +} + bool kthread_queue_work(struct kthread_worker *worker, struct kthread_work *work); =20 diff --git a/kernel/kthread.c b/kernel/kthread.c index 34b11dbfc756..379ebe7a217d 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -1030,33 +1030,10 @@ kthread_create_worker_on_node(unsigned int flags, i= nt node, const char namefmt[] worker =3D __kthread_create_worker_on_node(flags, node, namefmt, args); va_end(args); =20 - if (worker) - wake_up_process(worker->task); - return worker; } EXPORT_SYMBOL(kthread_create_worker_on_node); =20 -static __printf(3, 4) struct kthread_worker * -__kthread_create_worker_on_cpu(int cpu, unsigned int flags, - const char namefmt[], ...) -{ - struct kthread_worker *worker; - va_list args; - - va_start(args, namefmt); - worker =3D __kthread_create_worker_on_node(flags, cpu_to_node(cpu), - namefmt, args); - va_end(args); - - if (worker) { - kthread_bind(worker->task, cpu); - wake_up_process(worker->task); - } - - return worker; -} - /** * kthread_create_worker_on_cpu - create a kthread worker and bind it * to a given CPU and the associated NUMA node. @@ -1097,7 +1074,13 @@ struct kthread_worker * kthread_create_worker_on_cpu(int cpu, unsigned int flags, const char namefmt[]) { - return __kthread_create_worker_on_cpu(cpu, flags, namefmt, cpu); + struct kthread_worker *worker; + + worker =3D kthread_create_worker_on_node(flags, cpu_to_node(cpu), namefmt= , cpu); + if (worker) + kthread_bind(worker->task, cpu); + + return worker; } EXPORT_SYMBOL(kthread_create_worker_on_cpu); =20 diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 6ff87a3e000b..e038f4abb872 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -4789,7 +4789,7 @@ static void rcu_spawn_exp_par_gp_kworker(struct rcu_n= ode *rnp) if (rnp->exp_kworker) return; =20 - kworker =3D kthread_create_worker(0, name, rnp_index); + kworker =3D kthread_run_worker(0, name, rnp_index); if (IS_ERR_OR_NULL(kworker)) { pr_err("Failed to create par gp kworker on %d/%d\n", rnp->grplo, rnp->grphi); @@ -4816,7 +4816,7 @@ static void __init rcu_start_exp_gp_kworker(void) const char *name =3D "rcu_exp_gp_kthread_worker"; struct sched_param param =3D { .sched_priority =3D kthread_prio }; =20 - rcu_exp_gp_kworker =3D kthread_create_worker(0, name); + rcu_exp_gp_kworker =3D kthread_run_worker(0, name); if (IS_ERR_OR_NULL(rcu_exp_gp_kworker)) { pr_err("Failed to create %s!\n", name); rcu_exp_gp_kworker =3D NULL; diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 3fbaecfc88c2..79229136c2b2 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -7789,7 +7789,7 @@ static void __init wq_cpu_intensive_thresh_init(void) unsigned long thresh; unsigned long bogo; =20 - pwq_release_worker =3D kthread_create_worker(0, "pool_workqueue_release"); + pwq_release_worker =3D kthread_run_worker(0, "pool_workqueue_release"); BUG_ON(IS_ERR(pwq_release_worker)); =20 /* if the user set it to a specific value, keep it */ diff --git a/net/dsa/tag_ksz.c b/net/dsa/tag_ksz.c index ee7b272ab715..f21f2711921f 100644 --- a/net/dsa/tag_ksz.c +++ b/net/dsa/tag_ksz.c @@ -66,7 +66,7 @@ static int ksz_connect(struct dsa_switch *ds) if (!priv) return -ENOMEM; =20 - xmit_worker =3D kthread_create_worker(0, "dsa%d:%d_xmit", + xmit_worker =3D kthread_run_worker(0, "dsa%d:%d_xmit", ds->dst->index, ds->index); if (IS_ERR(xmit_worker)) { ret =3D PTR_ERR(xmit_worker); diff --git a/net/dsa/tag_ocelot_8021q.c b/net/dsa/tag_ocelot_8021q.c index b059381310fe..8953add48d33 100644 --- a/net/dsa/tag_ocelot_8021q.c +++ b/net/dsa/tag_ocelot_8021q.c @@ -110,7 +110,7 @@ static int ocelot_connect(struct dsa_switch *ds) if (!priv) return -ENOMEM; =20 - priv->xmit_worker =3D kthread_create_worker(0, "felix_xmit"); + priv->xmit_worker =3D kthread_run_worker(0, "felix_xmit"); if (IS_ERR(priv->xmit_worker)) { err =3D PTR_ERR(priv->xmit_worker); kfree(priv); diff --git a/net/dsa/tag_sja1105.c b/net/dsa/tag_sja1105.c index 1aba1d05c27a..d3d7b119babc 100644 --- a/net/dsa/tag_sja1105.c +++ b/net/dsa/tag_sja1105.c @@ -755,7 +755,7 @@ static int sja1105_connect(struct dsa_switch *ds) =20 spin_lock_init(&priv->meta_lock); =20 - xmit_worker =3D kthread_create_worker(0, "dsa%d:%d_xmit", + xmit_worker =3D kthread_run_worker(0, "dsa%d:%d_xmit", ds->dst->index, ds->index); if (IS_ERR(xmit_worker)) { err =3D PTR_ERR(xmit_worker); --=20 2.45.2