From 41f63c5359d14ca995172b8f6eaffd93f60fec54 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 3 Aug 2012 10:30:47 -0700 Subject: workqueue: use mod_delayed_work() instead of cancel + queue Convert delayed_work users doing cancel_delayed_work() followed by queue_delayed_work() to mod_delayed_work(). Most conversions are straight-forward. Ones worth mentioning are, * drivers/edac/edac_mc.c: edac_mc_workq_setup() converted to always use mod_delayed_work() and cancel loop in edac_mc_reset_delay_period() is dropped. * drivers/platform/x86/thinkpad_acpi.c: No need to remember whether watchdog is active or not. @fan_watchdog_active and related code dropped. * drivers/power/charger-manager.c: Seemingly a lot of delayed_work_pending() abuse going on here. [delayed_]work_pending() are unsynchronized and racy when used like this. I converted one instance in fullbatt_handler(). Please conver the rest so that it invokes workqueue APIs for the intended target state rather than trying to game work item pending state transitions. e.g. if timer should be modified - call mod_delayed_work(), canceled - call cancel_delayed_work[_sync](). * drivers/thermal/thermal_sys.c: thermal_zone_device_set_polling() simplified. Note that round_jiffies() calls in this function are meaningless. round_jiffies() work on absolute jiffies not delta delay used by delayed_work. v2: Tomi pointed out that __cancel_delayed_work() users can't be safely converted to mod_delayed_work(). They could be calling it from irq context and if that happens while delayed_work_timer_fn() is running, it could deadlock. __cancel_delayed_work() users are dropped. Signed-off-by: Tejun Heo Acked-by: Henrique de Moraes Holschuh Acked-by: Dmitry Torokhov Acked-by: Anton Vorontsov Acked-by: David Howells Cc: Tomi Valkeinen Cc: Jens Axboe Cc: Jiri Kosina Cc: Doug Thompson Cc: David Airlie Cc: Roland Dreier Cc: "John W. Linville" Cc: Zhang Rui Cc: Len Brown Cc: "J. Bruce Fields" Cc: Johannes Berg --- block/genhd.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'block/genhd.c') diff --git a/block/genhd.c b/block/genhd.c index cac7366957c3..5d8b44a6442b 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1534,10 +1534,8 @@ void disk_flush_events(struct gendisk *disk, unsigned int mask) spin_lock_irq(&ev->lock); ev->clearing |= mask; - if (!ev->block) { - cancel_delayed_work(&ev->dwork); - queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0); - } + if (!ev->block) + mod_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0); spin_unlock_irq(&ev->lock); } -- cgit v1.2.3-59-g8ed1b From 3b07e9ca26866697616097044f25fbe53dbab693 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Mon, 20 Aug 2012 14:51:24 -0700 Subject: workqueue: deprecate system_nrt[_freezable]_wq system_nrt[_freezable]_wq are now spurious. Mark them deprecated and convert all users to system[_freezable]_wq. If you're cc'd and wondering what's going on: Now all workqueues are non-reentrant, so there's no reason to use system_nrt[_freezable]_wq. Please use system[_freezable]_wq instead. This patch doesn't make any functional difference. Signed-off-by: Tejun Heo Acked-By: Lai Jiangshan Cc: Jens Axboe Cc: David Airlie Cc: Jiri Kosina Cc: "David S. Miller" Cc: Rusty Russell Cc: "Paul E. McKenney" Cc: David Howells --- block/blk-throttle.c | 7 +++---- block/genhd.c | 10 +++++----- drivers/gpu/drm/drm_crtc_helper.c | 6 +++--- drivers/hid/hid-wiimote-ext.c | 2 +- drivers/mmc/core/host.c | 4 ++-- drivers/net/virtio_net.c | 12 ++++++------ include/linux/workqueue.h | 4 ++-- kernel/srcu.c | 4 ++-- security/keys/gc.c | 8 ++++---- security/keys/key.c | 2 +- 10 files changed, 29 insertions(+), 30 deletions(-) (limited to 'block/genhd.c') diff --git a/block/blk-throttle.c b/block/blk-throttle.c index e287c19908c8..5a58e779912b 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -180,7 +180,7 @@ static inline unsigned int total_nr_queued(struct throtl_data *td) /* * Worker for allocating per cpu stat for tgs. This is scheduled on the - * system_nrt_wq once there are some groups on the alloc_list waiting for + * system_wq once there are some groups on the alloc_list waiting for * allocation. */ static void tg_stats_alloc_fn(struct work_struct *work) @@ -194,8 +194,7 @@ alloc_stats: stats_cpu = alloc_percpu(struct tg_stats_cpu); if (!stats_cpu) { /* allocation failed, try again after some time */ - queue_delayed_work(system_nrt_wq, dwork, - msecs_to_jiffies(10)); + schedule_delayed_work(dwork, msecs_to_jiffies(10)); return; } } @@ -238,7 +237,7 @@ static void throtl_pd_init(struct blkcg_gq *blkg) */ spin_lock_irqsave(&tg_stats_alloc_lock, flags); list_add(&tg->stats_alloc_node, &tg_stats_alloc_list); - queue_delayed_work(system_nrt_wq, &tg_stats_alloc_work, 0); + schedule_delayed_work(&tg_stats_alloc_work, 0); spin_unlock_irqrestore(&tg_stats_alloc_lock, flags); } diff --git a/block/genhd.c b/block/genhd.c index 5d8b44a6442b..a2f3d6a5f55c 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1490,9 +1490,9 @@ static void __disk_unblock_events(struct gendisk *disk, bool check_now) intv = disk_events_poll_jiffies(disk); set_timer_slack(&ev->dwork.timer, intv / 4); if (check_now) - queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0); + queue_delayed_work(system_freezable_wq, &ev->dwork, 0); else if (intv) - queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, intv); + queue_delayed_work(system_freezable_wq, &ev->dwork, intv); out_unlock: spin_unlock_irqrestore(&ev->lock, flags); } @@ -1535,7 +1535,7 @@ void disk_flush_events(struct gendisk *disk, unsigned int mask) spin_lock_irq(&ev->lock); ev->clearing |= mask; if (!ev->block) - mod_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0); + mod_delayed_work(system_freezable_wq, &ev->dwork, 0); spin_unlock_irq(&ev->lock); } @@ -1571,7 +1571,7 @@ unsigned int disk_clear_events(struct gendisk *disk, unsigned int mask) /* uncondtionally schedule event check and wait for it to finish */ disk_block_events(disk); - queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, 0); + queue_delayed_work(system_freezable_wq, &ev->dwork, 0); flush_delayed_work(&ev->dwork); __disk_unblock_events(disk, false); @@ -1608,7 +1608,7 @@ static void disk_events_workfn(struct work_struct *work) intv = disk_events_poll_jiffies(disk); if (!ev->block && intv) - queue_delayed_work(system_nrt_freezable_wq, &ev->dwork, intv); + queue_delayed_work(system_freezable_wq, &ev->dwork, intv); spin_unlock_irq(&ev->lock); diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c index 3252e7067d8b..8fa9d52820d9 100644 --- a/drivers/gpu/drm/drm_crtc_helper.c +++ b/drivers/gpu/drm/drm_crtc_helper.c @@ -968,7 +968,7 @@ static void output_poll_execute(struct work_struct *work) } if (repoll) - queue_delayed_work(system_nrt_wq, delayed_work, DRM_OUTPUT_POLL_PERIOD); + schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD); } void drm_kms_helper_poll_disable(struct drm_device *dev) @@ -993,7 +993,7 @@ void drm_kms_helper_poll_enable(struct drm_device *dev) } if (poll) - queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); + schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD); } EXPORT_SYMBOL(drm_kms_helper_poll_enable); @@ -1020,6 +1020,6 @@ void drm_helper_hpd_irq_event(struct drm_device *dev) /* kill timer and schedule immediate execution, this doesn't block */ cancel_delayed_work(&dev->mode_config.output_poll_work); if (drm_kms_helper_poll) - queue_delayed_work(system_nrt_wq, &dev->mode_config.output_poll_work, 0); + schedule_delayed_work(&dev->mode_config.output_poll_work, 0); } EXPORT_SYMBOL(drm_helper_hpd_irq_event); diff --git a/drivers/hid/hid-wiimote-ext.c b/drivers/hid/hid-wiimote-ext.c index 0a1805c9b0e5..d37cd092ffc7 100644 --- a/drivers/hid/hid-wiimote-ext.c +++ b/drivers/hid/hid-wiimote-ext.c @@ -204,7 +204,7 @@ static void wiiext_worker(struct work_struct *work) /* schedule work only once, otherwise mark for reschedule */ static void wiiext_schedule(struct wiimote_ext *ext) { - queue_work(system_nrt_wq, &ext->worker); + schedule_work(&ext->worker); } /* diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 597f189b4427..ee2e16b17017 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -204,8 +204,8 @@ void mmc_host_clk_release(struct mmc_host *host) host->clk_requests--; if (mmc_host_may_gate_card(host->card) && !host->clk_requests) - queue_delayed_work(system_nrt_wq, &host->clk_gate_work, - msecs_to_jiffies(host->clkgate_delay)); + schedule_delayed_work(&host->clk_gate_work, + msecs_to_jiffies(host->clkgate_delay)); spin_unlock_irqrestore(&host->clk_lock, flags); } diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 83d2b0c34c5e..9650c413e11f 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -521,7 +521,7 @@ static void refill_work(struct work_struct *work) /* In theory, this can happen: if we don't get any buffers in * we will *never* try to fill again. */ if (still_empty) - queue_delayed_work(system_nrt_wq, &vi->refill, HZ/2); + schedule_delayed_work(&vi->refill, HZ/2); } static int virtnet_poll(struct napi_struct *napi, int budget) @@ -540,7 +540,7 @@ again: if (vi->num < vi->max / 2) { if (!try_fill_recv(vi, GFP_ATOMIC)) - queue_delayed_work(system_nrt_wq, &vi->refill, 0); + schedule_delayed_work(&vi->refill, 0); } /* Out of packets? */ @@ -745,7 +745,7 @@ static int virtnet_open(struct net_device *dev) /* Make sure we have some buffers: if oom use wq. */ if (!try_fill_recv(vi, GFP_KERNEL)) - queue_delayed_work(system_nrt_wq, &vi->refill, 0); + schedule_delayed_work(&vi->refill, 0); virtnet_napi_enable(vi); return 0; @@ -1020,7 +1020,7 @@ static void virtnet_config_changed(struct virtio_device *vdev) { struct virtnet_info *vi = vdev->priv; - queue_work(system_nrt_wq, &vi->config_work); + schedule_work(&vi->config_work); } static int init_vqs(struct virtnet_info *vi) @@ -1152,7 +1152,7 @@ static int virtnet_probe(struct virtio_device *vdev) otherwise get link status from config. */ if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_STATUS)) { netif_carrier_off(dev); - queue_work(system_nrt_wq, &vi->config_work); + schedule_work(&vi->config_work); } else { vi->status = VIRTIO_NET_S_LINK_UP; netif_carrier_on(dev); @@ -1264,7 +1264,7 @@ static int virtnet_restore(struct virtio_device *vdev) netif_device_attach(vi->dev); if (!try_fill_recv(vi, GFP_KERNEL)) - queue_delayed_work(system_nrt_wq, &vi->refill, 0); + schedule_delayed_work(&vi->refill, 0); mutex_lock(&vi->config_lock); vi->config_enable = true; diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h index a351be7c3e91..1ce3fb08308d 100644 --- a/include/linux/workqueue.h +++ b/include/linux/workqueue.h @@ -310,12 +310,12 @@ extern struct workqueue_struct *system_long_wq; extern struct workqueue_struct *system_unbound_wq; extern struct workqueue_struct *system_freezable_wq; -static inline struct workqueue_struct *__system_nrt_wq(void) +static inline struct workqueue_struct * __deprecated __system_nrt_wq(void) { return system_wq; } -static inline struct workqueue_struct *__system_nrt_freezable_wq(void) +static inline struct workqueue_struct * __deprecated __system_nrt_freezable_wq(void) { return system_freezable_wq; } diff --git a/kernel/srcu.c b/kernel/srcu.c index 2095be3318d5..97c465ebd844 100644 --- a/kernel/srcu.c +++ b/kernel/srcu.c @@ -379,7 +379,7 @@ void call_srcu(struct srcu_struct *sp, struct rcu_head *head, rcu_batch_queue(&sp->batch_queue, head); if (!sp->running) { sp->running = true; - queue_delayed_work(system_nrt_wq, &sp->work, 0); + schedule_delayed_work(&sp->work, 0); } spin_unlock_irqrestore(&sp->queue_lock, flags); } @@ -631,7 +631,7 @@ static void srcu_reschedule(struct srcu_struct *sp) } if (pending) - queue_delayed_work(system_nrt_wq, &sp->work, SRCU_INTERVAL); + schedule_delayed_work(&sp->work, SRCU_INTERVAL); } /* diff --git a/security/keys/gc.c b/security/keys/gc.c index 61ab7c82ebb1..d67c97bb1025 100644 --- a/security/keys/gc.c +++ b/security/keys/gc.c @@ -62,7 +62,7 @@ void key_schedule_gc(time_t gc_at) if (gc_at <= now || test_bit(KEY_GC_REAP_KEYTYPE, &key_gc_flags)) { kdebug("IMMEDIATE"); - queue_work(system_nrt_wq, &key_gc_work); + schedule_work(&key_gc_work); } else if (gc_at < key_gc_next_run) { kdebug("DEFERRED"); key_gc_next_run = gc_at; @@ -77,7 +77,7 @@ void key_schedule_gc(time_t gc_at) void key_schedule_gc_links(void) { set_bit(KEY_GC_KEY_EXPIRED, &key_gc_flags); - queue_work(system_nrt_wq, &key_gc_work); + schedule_work(&key_gc_work); } /* @@ -120,7 +120,7 @@ void key_gc_keytype(struct key_type *ktype) set_bit(KEY_GC_REAP_KEYTYPE, &key_gc_flags); kdebug("schedule"); - queue_work(system_nrt_wq, &key_gc_work); + schedule_work(&key_gc_work); kdebug("sleep"); wait_on_bit(&key_gc_flags, KEY_GC_REAPING_KEYTYPE, key_gc_wait_bit, @@ -369,7 +369,7 @@ maybe_resched: } if (gc_state & KEY_GC_REAP_AGAIN) - queue_work(system_nrt_wq, &key_gc_work); + schedule_work(&key_gc_work); kleave(" [end %x]", gc_state); return; diff --git a/security/keys/key.c b/security/keys/key.c index 50d96d4e06f2..3cbe3529c418 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -598,7 +598,7 @@ void key_put(struct key *key) key_check(key); if (atomic_dec_and_test(&key->usage)) - queue_work(system_nrt_wq, &key_gc_work); + schedule_work(&key_gc_work); } } EXPORT_SYMBOL(key_put); -- cgit v1.2.3-59-g8ed1b