Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
authorLinus Torvalds <torvalds@linux-foundation.org>
Mon, 31 Mar 2014 22:08:51 +0000 (15:08 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 31 Mar 2014 22:08:51 +0000 (15:08 -0700)
Pull workqueue changes from Tejun Heo:
 "PREPARE_[DELAYED_]WORK() were used to change the work function of work
  items without fully reinitializing it; however, this makes workqueue
  consider the work item as a different one from before and allows the
  work item to start executing before the previous instance is finished
  which can lead to extremely subtle issues which are painful to debug.

  The interface has never been popular.  This pull request contains
  patches to remove existing usages and kill the interface.  As one of
  the changes was routed during the last devel cycle and another
  depended on a pending change in nvme, for-3.15 contains a couple merge
  commits.

  In addition, interfaces which were deprecated quite a while ago -
  __cancel_delayed_work() and WQ_NON_REENTRANT - are removed too"

* 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: remove deprecated WQ_NON_REENTRANT
  workqueue: Spelling s/instensive/intensive/
  workqueue: remove PREPARE_[DELAYED_]WORK()
  staging/fwserial: don't use PREPARE_WORK
  afs: don't use PREPARE_WORK
  nvme: don't use PREPARE_WORK
  usb: don't use PREPARE_DELAYED_WORK
  floppy: don't use PREPARE_[DELAYED_]WORK
  ps3-vuart: don't use PREPARE_WORK
  wireless/rt2x00: don't use PREPARE_WORK in rt2800usb.c
  workqueue: Remove deprecated __cancel_delayed_work()

13 files changed:
drivers/block/floppy.c
drivers/block/nvme-core.c
drivers/mmc/host/dw_mmc.c
drivers/net/wireless/rt2x00/rt2800usb.c
drivers/ps3/ps3-vuart.c
drivers/staging/fwserial/fwserial.c
drivers/staging/fwserial/fwserial.h
drivers/usb/core/hub.c
fs/afs/internal.h
fs/afs/rxrpc.c
include/linux/nvme.h
include/linux/workqueue.h
net/l2tp/l2tp_core.c

index 2023043ce7c0e94b0e3c3618eb0787a9ad5ddb73..8f5565bf34cda31504e526ccc3d79d4e7fe20fd2 100644 (file)
@@ -961,17 +961,31 @@ static void empty(void)
 {
 }
 
-static DECLARE_WORK(floppy_work, NULL);
+static void (*floppy_work_fn)(void);
+
+static void floppy_work_workfn(struct work_struct *work)
+{
+       floppy_work_fn();
+}
+
+static DECLARE_WORK(floppy_work, floppy_work_workfn);
 
 static void schedule_bh(void (*handler)(void))
 {
        WARN_ON(work_pending(&floppy_work));
 
-       PREPARE_WORK(&floppy_work, (work_func_t)handler);
+       floppy_work_fn = handler;
        queue_work(floppy_wq, &floppy_work);
 }
 
-static DECLARE_DELAYED_WORK(fd_timer, NULL);
+static void (*fd_timer_fn)(void) = NULL;
+
+static void fd_timer_workfn(struct work_struct *work)
+{
+       fd_timer_fn();
+}
+
+static DECLARE_DELAYED_WORK(fd_timer, fd_timer_workfn);
 
 static void cancel_activity(void)
 {
@@ -982,7 +996,7 @@ static void cancel_activity(void)
 
 /* this function makes sure that the disk stays in the drive during the
  * transfer */
-static void fd_watchdog(struct work_struct *arg)
+static void fd_watchdog(void)
 {
        debug_dcl(DP->flags, "calling disk change from watchdog\n");
 
@@ -993,7 +1007,7 @@ static void fd_watchdog(struct work_struct *arg)
                reset_fdc();
        } else {
                cancel_delayed_work(&fd_timer);
-               PREPARE_DELAYED_WORK(&fd_timer, fd_watchdog);
+               fd_timer_fn = fd_watchdog;
                queue_delayed_work(floppy_wq, &fd_timer, HZ / 10);
        }
 }
@@ -1005,7 +1019,8 @@ static void main_command_interrupt(void)
 }
 
 /* waits for a delay (spinup or select) to pass */
-static int fd_wait_for_completion(unsigned long expires, work_func_t function)
+static int fd_wait_for_completion(unsigned long expires,
+                                 void (*function)(void))
 {
        if (FDCS->reset) {
                reset_fdc();    /* do the reset during sleep to win time
@@ -1016,7 +1031,7 @@ static int fd_wait_for_completion(unsigned long expires, work_func_t function)
 
        if (time_before(jiffies, expires)) {
                cancel_delayed_work(&fd_timer);
-               PREPARE_DELAYED_WORK(&fd_timer, function);
+               fd_timer_fn = function;
                queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies);
                return 1;
        }
@@ -1334,8 +1349,7 @@ static int fdc_dtr(void)
         * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
         */
        FDCS->dtr = raw_cmd->rate & 3;
-       return fd_wait_for_completion(jiffies + 2UL * HZ / 100,
-                                     (work_func_t)floppy_ready);
+       return fd_wait_for_completion(jiffies + 2UL * HZ / 100, floppy_ready);
 }                              /* fdc_dtr */
 
 static void tell_sector(void)
@@ -1440,7 +1454,7 @@ static void setup_rw_floppy(void)
        int flags;
        int dflags;
        unsigned long ready_date;
-       work_func_t function;
+       void (*function)(void);
 
        flags = raw_cmd->flags;
        if (flags & (FD_RAW_READ | FD_RAW_WRITE))
@@ -1454,9 +1468,9 @@ static void setup_rw_floppy(void)
                 */
                if (time_after(ready_date, jiffies + DP->select_delay)) {
                        ready_date -= DP->select_delay;
-                       function = (work_func_t)floppy_start;
+                       function = floppy_start;
                } else
-                       function = (work_func_t)setup_rw_floppy;
+                       function = setup_rw_floppy;
 
                /* wait until the floppy is spinning fast enough */
                if (fd_wait_for_completion(ready_date, function))
@@ -1486,7 +1500,7 @@ static void setup_rw_floppy(void)
                inr = result();
                cont->interrupt();
        } else if (flags & FD_RAW_NEED_DISK)
-               fd_watchdog(NULL);
+               fd_watchdog();
 }
 
 static int blind_seek;
@@ -1863,7 +1877,7 @@ static int start_motor(void (*function)(void))
 
        /* wait_for_completion also schedules reset if needed. */
        return fd_wait_for_completion(DRS->select_date + DP->select_delay,
-                                     (work_func_t)function);
+                                     function);
 }
 
 static void floppy_ready(void)
index 51824d1f23ea53df5d49cd6d4e10e07b6b45b1fb..8459e4e7c71940462134eb6a7ad68c86f03ebb7a 100644 (file)
@@ -993,7 +993,7 @@ static void nvme_abort_cmd(int cmdid, struct nvme_queue *nvmeq)
                dev_warn(&dev->pci_dev->dev,
                        "I/O %d QID %d timeout, reset controller\n", cmdid,
                                                                nvmeq->qid);
-               PREPARE_WORK(&dev->reset_work, nvme_reset_failed_dev);
+               dev->reset_workfn = nvme_reset_failed_dev;
                queue_work(nvme_workq, &dev->reset_work);
                return;
        }
@@ -1696,8 +1696,7 @@ static int nvme_kthread(void *data)
                                list_del_init(&dev->node);
                                dev_warn(&dev->pci_dev->dev,
                                        "Failed status, reset controller\n");
-                               PREPARE_WORK(&dev->reset_work,
-                                                       nvme_reset_failed_dev);
+                               dev->reset_workfn = nvme_reset_failed_dev;
                                queue_work(nvme_workq, &dev->reset_work);
                                continue;
                        }
@@ -2406,7 +2405,7 @@ static int nvme_dev_resume(struct nvme_dev *dev)
                return ret;
        if (ret == -EBUSY) {
                spin_lock(&dev_list_lock);
-               PREPARE_WORK(&dev->reset_work, nvme_remove_disks);
+               dev->reset_workfn = nvme_remove_disks;
                queue_work(nvme_workq, &dev->reset_work);
                spin_unlock(&dev_list_lock);
        }
@@ -2435,6 +2434,12 @@ static void nvme_reset_failed_dev(struct work_struct *ws)
        nvme_dev_reset(dev);
 }
 
+static void nvme_reset_workfn(struct work_struct *work)
+{
+       struct nvme_dev *dev = container_of(work, struct nvme_dev, reset_work);
+       dev->reset_workfn(work);
+}
+
 static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
        int result = -ENOMEM;
@@ -2453,7 +2458,8 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
                goto free;
 
        INIT_LIST_HEAD(&dev->namespaces);
-       INIT_WORK(&dev->reset_work, nvme_reset_failed_dev);
+       dev->reset_workfn = nvme_reset_failed_dev;
+       INIT_WORK(&dev->reset_work, nvme_reset_workfn);
        dev->pci_dev = pdev;
        pci_set_drvdata(pdev, dev);
        result = nvme_set_instance(dev);
@@ -2553,7 +2559,7 @@ static int nvme_resume(struct device *dev)
        struct nvme_dev *ndev = pci_get_drvdata(pdev);
 
        if (nvme_dev_resume(ndev) && !work_busy(&ndev->reset_work)) {
-               PREPARE_WORK(&ndev->reset_work, nvme_reset_failed_dev);
+               ndev->reset_workfn = nvme_reset_failed_dev;
                queue_work(nvme_workq, &ndev->reset_work);
        }
        return 0;
index 55cd110a49c4009451b0ca4b35144c8631b8c7d1..c204b7d1532c0f1c910b25a7435d3f12c8435732 100644 (file)
@@ -2607,7 +2607,7 @@ int dw_mci_probe(struct dw_mci *host)
 
        tasklet_init(&host->tasklet, dw_mci_tasklet_func, (unsigned long)host);
        host->card_workqueue = alloc_workqueue("dw-mci-card",
-                       WQ_MEM_RECLAIM | WQ_NON_REENTRANT, 1);
+                       WQ_MEM_RECLAIM, 1);
        if (!host->card_workqueue) {
                ret = -ENOMEM;
                goto err_dmaunmap;
index caddc1b427a919659200c539552a619af49c5d17..42a2e06512f2f0900ac7f9384b1e247013f2b11d 100644 (file)
@@ -764,7 +764,7 @@ static int rt2800usb_probe_hw(struct rt2x00_dev *rt2x00dev)
        /*
         * Overwrite TX done handler
         */
-       PREPARE_WORK(&rt2x00dev->txdone_work, rt2800usb_work_txdone);
+       INIT_WORK(&rt2x00dev->txdone_work, rt2800usb_work_txdone);
 
        return 0;
 }
index fb7300837feef25a6b2a80de582baf01031bf22a..bc1e5139ba2957712e9800182fe6d7a24c568468 100644 (file)
@@ -699,8 +699,6 @@ int ps3_vuart_read_async(struct ps3_system_bus_device *dev, unsigned int bytes)
 
        BUG_ON(!bytes);
 
-       PREPARE_WORK(&priv->rx_list.work.work, ps3_vuart_work);
-
        spin_lock_irqsave(&priv->rx_list.lock, flags);
        if (priv->rx_list.bytes_held >= bytes) {
                dev_dbg(&dev->core, "%s:%d: schedule_work %xh bytes\n",
@@ -1052,7 +1050,7 @@ static int ps3_vuart_probe(struct ps3_system_bus_device *dev)
        INIT_LIST_HEAD(&priv->rx_list.head);
        spin_lock_init(&priv->rx_list.lock);
 
-       INIT_WORK(&priv->rx_list.work.work, NULL);
+       INIT_WORK(&priv->rx_list.work.work, ps3_vuart_work);
        priv->rx_list.work.trigger = 0;
        priv->rx_list.work.dev = dev;
 
index 8af136e9c9dc16e1ab5f5f5cecf7dfe1579c528b..b22142ee52625c8bce4130b24cf0e9046544a050 100644 (file)
@@ -2036,6 +2036,13 @@ static void fwserial_auto_connect(struct work_struct *work)
                schedule_delayed_work(&peer->connect, CONNECT_RETRY_DELAY);
 }
 
+static void fwserial_peer_workfn(struct work_struct *work)
+{
+       struct fwtty_peer *peer = to_peer(work, work);
+
+       peer->workfn(work);
+}
+
 /**
  * fwserial_add_peer - add a newly probed 'serial' unit device as a 'peer'
  * @serial: aggregate representing the specific fw_card to add the peer to
@@ -2100,7 +2107,7 @@ static int fwserial_add_peer(struct fw_serial *serial, struct fw_unit *unit)
        peer->port = NULL;
 
        init_timer(&peer->timer);
-       INIT_WORK(&peer->work, NULL);
+       INIT_WORK(&peer->work, fwserial_peer_workfn);
        INIT_DELAYED_WORK(&peer->connect, fwserial_auto_connect);
 
        /* associate peer with specific fw_card */
@@ -2702,7 +2709,7 @@ static int fwserial_parse_mgmt_write(struct fwtty_peer *peer,
 
                } else {
                        peer->work_params.plug_req = pkt->plug_req;
-                       PREPARE_WORK(&peer->work, fwserial_handle_plug_req);
+                       peer->workfn = fwserial_handle_plug_req;
                        queue_work(system_unbound_wq, &peer->work);
                }
                break;
@@ -2731,7 +2738,7 @@ static int fwserial_parse_mgmt_write(struct fwtty_peer *peer,
                        fwtty_err(&peer->unit, "unplug req: busy\n");
                        rcode = RCODE_CONFLICT_ERROR;
                } else {
-                       PREPARE_WORK(&peer->work, fwserial_handle_unplug_req);
+                       peer->workfn = fwserial_handle_unplug_req;
                        queue_work(system_unbound_wq, &peer->work);
                }
                break;
index 54f7f9b9b2123a120a48595a878723b5d89d465e..98b853d4acbcf16181984bf3f529c24f4bab3a1c 100644 (file)
@@ -91,6 +91,7 @@ struct fwtty_peer {
        struct rcu_head         rcu;
 
        spinlock_t              lock;
+       work_func_t             workfn;
        struct work_struct      work;
        struct peer_work_params work_params;
        struct timer_list       timer;
index 64ea21971be23f770986b25cf05890553cf8d195..5cbf78d0be2539c868dab16a815b15e4bfe28b99 100644 (file)
@@ -1040,7 +1040,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
                 */
                if (type == HUB_INIT) {
                        delay = hub_power_on(hub, false);
-                       PREPARE_DELAYED_WORK(&hub->init_work, hub_init_func2);
+                       INIT_DELAYED_WORK(&hub->init_work, hub_init_func2);
                        schedule_delayed_work(&hub->init_work,
                                        msecs_to_jiffies(delay));
 
@@ -1194,7 +1194,7 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
 
                /* Don't do a long sleep inside a workqueue routine */
                if (type == HUB_INIT2) {
-                       PREPARE_DELAYED_WORK(&hub->init_work, hub_init_func3);
+                       INIT_DELAYED_WORK(&hub->init_work, hub_init_func3);
                        schedule_delayed_work(&hub->init_work,
                                        msecs_to_jiffies(delay));
                        return;         /* Continues at init3: below */
index 6621f800812287f6f0fc27cdc7f71a2a32287af2..be75b500005d0d4f68b2d6e3855e71660016353d 100644 (file)
@@ -75,6 +75,7 @@ struct afs_call {
        const struct afs_call_type *type;       /* type of call */
        const struct afs_wait_mode *wait_mode;  /* completion wait mode */
        wait_queue_head_t       waitq;          /* processes awaiting completion */
+       work_func_t             async_workfn;
        struct work_struct      async_work;     /* asynchronous work processor */
        struct work_struct      work;           /* actual work processor */
        struct sk_buff_head     rx_queue;       /* received packets */
index 8ad8c2a0703a120c2dde7f425225f1d515b13f0c..ef943df73b8cdee2c6964439b81417a9c1110b12 100644 (file)
@@ -644,7 +644,7 @@ static void afs_process_async_call(struct work_struct *work)
 
                /* we can't just delete the call because the work item may be
                 * queued */
-               PREPARE_WORK(&call->async_work, afs_delete_async_call);
+               call->async_workfn = afs_delete_async_call;
                queue_work(afs_async_calls, &call->async_work);
        }
 
@@ -663,6 +663,13 @@ void afs_transfer_reply(struct afs_call *call, struct sk_buff *skb)
        call->reply_size += len;
 }
 
+static void afs_async_workfn(struct work_struct *work)
+{
+       struct afs_call *call = container_of(work, struct afs_call, async_work);
+
+       call->async_workfn(work);
+}
+
 /*
  * accept the backlog of incoming calls
  */
@@ -685,7 +692,8 @@ static void afs_collect_incoming_call(struct work_struct *work)
                                return;
                        }
 
-                       INIT_WORK(&call->async_work, afs_process_async_call);
+                       call->async_workfn = afs_process_async_call;
+                       INIT_WORK(&call->async_work, afs_async_workfn);
                        call->wait_mode = &afs_async_incoming_call;
                        call->type = &afs_RXCMxxxx;
                        init_waitqueue_head(&call->waitq);
index 69ae03f6eb159a39b2bd589add2c56b2c1c8f6cc..6b9aafed225fcd9a48228ac9f6044c7a956cc325 100644 (file)
@@ -87,6 +87,7 @@ struct nvme_dev {
        struct list_head namespaces;
        struct kref kref;
        struct miscdevice miscdev;
+       work_func_t reset_workfn;
        struct work_struct reset_work;
        char name[12];
        char serial[20];
index 704f4f652d0af8b28406154678ee38b5f98298bf..532994651684b62b26da6ab9527824f36735c49a 100644 (file)
@@ -177,17 +177,6 @@ struct execute_work {
 #define DECLARE_DEFERRABLE_WORK(n, f)                                  \
        struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f, TIMER_DEFERRABLE)
 
-/*
- * initialize a work item's function pointer
- */
-#define PREPARE_WORK(_work, _func)                                     \
-       do {                                                            \
-               (_work)->func = (_func);                                \
-       } while (0)
-
-#define PREPARE_DELAYED_WORK(_work, _func)                             \
-       PREPARE_WORK(&(_work)->work, (_func))
-
 #ifdef CONFIG_DEBUG_OBJECTS_WORK
 extern void __init_work(struct work_struct *work, int onstack);
 extern void destroy_work_on_stack(struct work_struct *work);
@@ -217,7 +206,7 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
                (_work)->data = (atomic_long_t) WORK_DATA_INIT();       \
                lockdep_init_map(&(_work)->lockdep_map, #_work, &__key, 0); \
                INIT_LIST_HEAD(&(_work)->entry);                        \
-               PREPARE_WORK((_work), (_func));                         \
+               (_work)->func = (_func);                                \
        } while (0)
 #else
 #define __INIT_WORK(_work, _func, _onstack)                            \
@@ -225,7 +214,7 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
                __init_work((_work), _onstack);                         \
                (_work)->data = (atomic_long_t) WORK_DATA_INIT();       \
                INIT_LIST_HEAD(&(_work)->entry);                        \
-               PREPARE_WORK((_work), (_func));                         \
+               (_work)->func = (_func);                                \
        } while (0)
 #endif
 
@@ -295,17 +284,11 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
  * Documentation/workqueue.txt.
  */
 enum {
-       /*
-        * All wqs are now non-reentrant making the following flag
-        * meaningless.  Will be removed.
-        */
-       WQ_NON_REENTRANT        = 1 << 0, /* DEPRECATED */
-
        WQ_UNBOUND              = 1 << 1, /* not bound to any cpu */
        WQ_FREEZABLE            = 1 << 2, /* freeze during suspend */
        WQ_MEM_RECLAIM          = 1 << 3, /* may be used for memory reclaim */
        WQ_HIGHPRI              = 1 << 4, /* high priority */
-       WQ_CPU_INTENSIVE        = 1 << 5, /* cpu instensive workqueue */
+       WQ_CPU_INTENSIVE        = 1 << 5, /* cpu intensive workqueue */
        WQ_SYSFS                = 1 << 6, /* visible in sysfs, see wq_sysfs_register() */
 
        /*
@@ -602,21 +585,6 @@ static inline bool keventd_up(void)
        return system_wq != NULL;
 }
 
-/*
- * Like above, but uses del_timer() instead of del_timer_sync(). This means,
- * if it returns 0 the timer function may be running and the queueing is in
- * progress.
- */
-static inline bool __deprecated __cancel_delayed_work(struct delayed_work *work)
-{
-       bool ret;
-
-       ret = del_timer(&work->timer);
-       if (ret)
-               work_clear_pending(&work->work);
-       return ret;
-}
-
 /* used to be different but now identical to flush_work(), deprecated */
 static inline bool __deprecated flush_work_sync(struct work_struct *work)
 {
index 85d9d94c0a3c57706540ce9b5efc78309dd69ca0..c83827e7c3248ad493b576ca565f21b485aa0453 100644 (file)
@@ -2016,7 +2016,7 @@ static int __init l2tp_init(void)
        if (rc)
                goto out;
 
-       l2tp_wq = alloc_workqueue("l2tp", WQ_NON_REENTRANT | WQ_UNBOUND, 0);
+       l2tp_wq = alloc_workqueue("l2tp", WQ_UNBOUND, 0);
        if (!l2tp_wq) {
                pr_err("alloc_workqueue failed\n");
                rc = -ENOMEM;