[RFC PATCH 19/20] treewide: Introduce kthread_run_worker[_on_cpu]()
From: Frederic Weisbecker
Date: Fri Jul 26 2024 - 18:01:31 EST
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 <frederic@xxxxxxxxxx>
---
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 flags)
pid_nr = pid_vnr(pid);
put_pid(pid);
- pit->worker = kthread_create_worker(0, "kvm-pit/%d", pid_nr);
+ pit->worker = kthread_run_worker(0, "kvm-pit/%d", pid_nr);
if (IS_ERR(pit->worker))
goto fail_kthread;
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);
- engine->kworker = kthread_create_worker(0, "%s", engine->name);
+ engine->kworker = 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;
- kworker_fie = kthread_create_worker(0, "cppc_fie");
+ kworker_fie = 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 *vblank)
INIT_LIST_HEAD(&vblank->pending_work);
init_waitqueue_head(&vblank->work_wait_queue);
- worker = kthread_create_worker(0, "card%d-crtc%d",
+ worker = 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/drivers/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;
- worker = kthread_create_worker(0, "igt/parallel:%s",
+ worker = kthread_run_worker(0, "igt/parallel:%s",
data[n].ce[0]->engine->name);
if (IS_ERR(worker)) {
err = 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 *smoke, unsigned int flags)
arg[id].batch = NULL;
arg[id].count = 0;
- worker[id] = kthread_create_worker(0, "igt/smoke:%d", id);
+ worker[id] = kthread_run_worker(0, "igt/smoke:%d", id);
if (IS_ERR(worker[id])) {
err = 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 = other;
threads[tmp].flags = flags;
- worker = kthread_create_worker(0, "igt/%s",
+ worker = kthread_run_worker(0, "igt/%s",
other->name);
if (IS_ERR(worker)) {
err = 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;
for_each_gt(gt, i915, i) {
- threads[i].worker = kthread_create_worker(0, "igt/slpc_parallel:%d", gt->info.id);
+ threads[i].worker = kthread_run_worker(0, "igt/slpc_parallel:%d", gt->info.id);
if (IS_ERR(threads[i].worker)) {
ret = PTR_ERR(threads[i].worker);
diff --git a/drivers/gpu/drm/i915/selftests/i915_request.c b/drivers/gpu/drm/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 = 0; n < ncpus; n++) {
struct kthread_worker *worker;
- worker = kthread_create_worker(0, "igt/%d", n);
+ worker = kthread_run_worker(0, "igt/%d", n);
if (IS_ERR(worker)) {
ret = PTR_ERR(worker);
ncpus = n;
@@ -1645,7 +1645,7 @@ static int live_parallel_engines(void *arg)
for_each_uabi_engine(engine, i915) {
struct kthread_worker *worker;
- worker = kthread_create_worker(0, "igt/parallel:%s",
+ worker = kthread_run_worker(0, "igt/parallel:%s",
engine->name);
if (IS_ERR(worker)) {
err = PTR_ERR(worker);
@@ -1806,7 +1806,7 @@ static int live_breadcrumbs_smoketest(void *arg)
unsigned int i = idx * ncpus + n;
struct kthread_worker *worker;
- worker = kthread_create_worker(0, "igt/%d.%d", idx, n);
+ worker = kthread_run_worker(0, "igt/%d.%d", idx, n);
if (IS_ERR(worker)) {
ret = PTR_ERR(worker);
goto out_flush;
@@ -3219,7 +3219,7 @@ static int perf_parallel_engines(void *arg)
memset(&engines[idx].p, 0, sizeof(engines[idx].p));
- worker = kthread_create_worker(0, "igt:%s",
+ worker = kthread_run_worker(0, "igt:%s",
engine->name);
if (IS_ERR(worker)) {
err = 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)
mutex_init(&kms->dump_mutex);
- kms->dump_worker = kthread_create_worker(0, "%s", "disp_snapshot");
+ kms->dump_worker = kthread_run_worker(0, "%s", "disp_snapshot");
if (IS_ERR(kms->dump_worker))
DRM_ERROR("failed to create disp state task\n");
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.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_timer *timer,
timer->kms = kms;
timer->crtc_idx = crtc_idx;
- timer->worker = kthread_create_worker(0, "atomic-worker-%d", crtc_idx);
+ timer->worker = kthread_run_worker(0, "atomic-worker-%d", crtc_idx);
if (IS_ERR(timer->worker)) {
int ret = PTR_ERR(timer->worker);
timer->worker = 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 platform_device *pdev,
gpu->funcs = funcs;
gpu->name = name;
- gpu->worker = kthread_create_worker(0, "gpu-worker");
+ gpu->worker = kthread_run_worker(0, "gpu-worker");
if (IS_ERR(gpu->worker)) {
ret = PTR_ERR(gpu->worker);
gpu->worker = 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 drm_driver *drv)
/* initialize event thread */
ev_thread = &priv->event_thread[drm_crtc_index(crtc)];
ev_thread->dev = ddev;
- ev_thread->worker = kthread_create_worker(0, "crtc_event:%d", crtc->base.id);
+ ev_thread->worker = kthread_run_worker(0, "crtc_event:%d", crtc->base.id);
if (IS_ERR(ev_thread->worker)) {
ret = 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 = &wave5_vpu_timer_callback;
- dev->worker = kthread_create_worker(0, "vpu_irq_thread");
+ dev->worker = kthread_run_worker(0, "vpu_irq_thread");
if (IS_ERR(dev->worker)) {
dev_err(&pdev->dev, "failed to create vpu irq worker\n");
ret = PTR_ERR(dev->worker);
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.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_chip *chip)
kthread_init_delayed_work(&chip->irq_poll_work,
mv88e6xxx_irq_poll);
- chip->kworker = kthread_create_worker(0, "%s", dev_name(chip->dev));
+ chip->kworker = kthread_run_worker(0, "%s", dev_name(chip->dev));
if (IS_ERR(chip->kworker))
return PTR_ERR(chip->kworker);
diff --git a/drivers/net/ethernet/intel/ice/ice_dpll.c b/drivers/net/ethernet/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;
kthread_init_delayed_work(&d->work, ice_dpll_periodic_work);
- kworker = kthread_create_worker(0, "ice-dplls-%s",
+ kworker = 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/ethernet/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 = gnss;
kthread_init_delayed_work(&gnss->read_work, ice_gnss_read);
- kworker = kthread_create_worker(0, "ice-gnss-%s", dev_name(dev));
+ kworker = 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/ethernet/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, struct ice_ptp *ptp)
/* Allocate a kworker for handling work required for the ports
* connected to the PTP hardware clock.
*/
- kworker = kthread_create_worker(0, "ice-ptp-%s",
+ kworker = 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/chrome/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 device *dev,
int err;
ec_spi->high_pri_worker =
- kthread_create_worker(0, "cros_ec_spi_high_pri");
+ kthread_run_worker(0, "cros_ec_spi_high_pri");
if (IS_ERR(ec_spi->high_pri_worker)) {
err = 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_info *info,
if (ptp->info->do_aux_work) {
kthread_init_delayed_work(&ptp->aux_work, ptp_aux_kworker);
- ptp->kworker = kthread_create_worker(0, "ptp%d", ptp->index);
+ ptp->kworker = kthread_run_worker(0, "ptp%d", ptp->index);
if (IS_ERR(ptp->kworker)) {
err = 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 = false;
ctlr->queue_empty = true;
- ctlr->kworker = kthread_create_worker(0, dev_name(&ctlr->dev));
+ ctlr->kworker = 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 *dev, struct tcpc_dev *tcpc)
mutex_init(&port->lock);
mutex_init(&port->swap_lock);
- port->wq = kthread_create_worker(0, dev_name(dev));
+ port->wq = 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 = &vdpasim->vdpa.dev;
kthread_init_work(&vdpasim->work, vdpasim_work_fn);
- vdpasim->worker = kthread_create_worker(0, "vDPA sim worker: %s",
+ vdpasim->worker = 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_dev.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;
- watchdog_kworker = kthread_create_worker(0, "watchdogd");
+ watchdog_kworker = 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 =
- kthread_create_worker_on_cpu(cpu, 0, "erofs_worker/%u");
+ kthread_run_worker_on_cpu(cpu, 0, "erofs_worker/%u");
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[], ...);
#define kthread_create_worker(flags, namefmt, ...) \
-({ \
- struct kthread_worker *__kw \
- = 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 \
+ = kthread_create_worker(flags, namefmt, ## __VA_ARGS__); \
+ if (!IS_ERR(__kw)) \
+ wake_up_process(__kw->task); \
+ __kw; \
})
struct kthread_worker *
kthread_create_worker_on_cpu(int cpu, unsigned int flags,
const char namefmt[]);
+/**
+ * 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 = 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);
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, int node, const char namefmt[]
worker = __kthread_create_worker_on_node(flags, node, namefmt, args);
va_end(args);
- if (worker)
- wake_up_process(worker->task);
-
return worker;
}
EXPORT_SYMBOL(kthread_create_worker_on_node);
-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 = __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 = 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);
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_node *rnp)
if (rnp->exp_kworker)
return;
- kworker = kthread_create_worker(0, name, rnp_index);
+ kworker = 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 = "rcu_exp_gp_kthread_worker";
struct sched_param param = { .sched_priority = kthread_prio };
- rcu_exp_gp_kworker = kthread_create_worker(0, name);
+ rcu_exp_gp_kworker = 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 = 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;
- pwq_release_worker = kthread_create_worker(0, "pool_workqueue_release");
+ pwq_release_worker = kthread_run_worker(0, "pool_workqueue_release");
BUG_ON(IS_ERR(pwq_release_worker));
/* 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;
- xmit_worker = kthread_create_worker(0, "dsa%d:%d_xmit",
+ xmit_worker = kthread_run_worker(0, "dsa%d:%d_xmit",
ds->dst->index, ds->index);
if (IS_ERR(xmit_worker)) {
ret = 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;
- priv->xmit_worker = kthread_create_worker(0, "felix_xmit");
+ priv->xmit_worker = kthread_run_worker(0, "felix_xmit");
if (IS_ERR(priv->xmit_worker)) {
err = 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)
spin_lock_init(&priv->meta_lock);
- xmit_worker = kthread_create_worker(0, "dsa%d:%d_xmit",
+ xmit_worker = kthread_run_worker(0, "dsa%d:%d_xmit",
ds->dst->index, ds->index);
if (IS_ERR(xmit_worker)) {
err = PTR_ERR(xmit_worker);
--
2.45.2