Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 24 Sep 2002 13:39:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 24 Sep 2002 13:34:18 -0400 Received: from d12lmsgate-2.de.ibm.com ([195.212.91.200]:48846 "EHLO d12lmsgate-2.de.ibm.com") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Tue, 24 Sep 2002 13:22:48 -0400 Content-Type: text/plain; charset="us-ascii" From: Martin Schwidefsky Organization: IBM Deutschland GmbH To: linux-kernel@vger.kernel.org, torvalds@transmeta.com Subject: [PATCH] 2.5.38 s390 fixes: 07_tasklet. Date: Tue, 24 Sep 2002 19:25:32 +0200 X-Mailer: KMail [version 1.4] MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Message-Id: <200209241925.32989.schwidefsky@de.ibm.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8329 Lines: 280 Replace IMMEDIATE_BH bottom half by tasklets in 3215, ctc and iucv driver. diff -urN linux-2.5.38/drivers/s390/char/con3215.c linux-2.5.38-s390/drivers/s390/char/con3215.c --- linux-2.5.38/drivers/s390/char/con3215.c Sun Sep 22 06:25:01 2002 +++ linux-2.5.38-s390/drivers/s390/char/con3215.c Tue Sep 24 17:42:15 2002 @@ -89,7 +89,7 @@ int written; /* number of bytes in write requests */ devstat_t devstat; /* device status structure for do_IO */ struct tty_struct *tty; /* pointer to tty structure if present */ - struct tq_struct tqueue; /* task queue to bottom half */ + struct tasklet_struct tasklet; raw3215_req *queued_read; /* pointer to queued read requests */ raw3215_req *queued_write; /* pointer to queued write requests */ wait_queue_head_t empty_wait; /* wait queue for flushing */ @@ -341,7 +341,7 @@ * The bottom half handler routine for 3215 devices. It tries to start * the next IO and wakes up processes waiting on the tty. */ -static void raw3215_softint(void *data) +static void raw3215_tasklet(void *data) { raw3215_info *raw; struct tty_struct *tty; @@ -377,12 +377,7 @@ if (raw->flags & RAW3215_BH_PENDING) return; /* already pending */ raw->flags |= RAW3215_BH_PENDING; - INIT_LIST_HEAD(&raw->tqueue.list); - raw->tqueue.sync = 0; - raw->tqueue.routine = raw3215_softint; - raw->tqueue.data = raw; - queue_task(&raw->tqueue, &tq_immediate); - mark_bh(IMMEDIATE_BH); + tasklet_hi_schedule(&raw->tasklet); } /* @@ -867,8 +862,9 @@ kfree(raw); return -ENOMEM; } - raw->tqueue.routine = raw3215_softint; - raw->tqueue.data = raw; + tasklet_init(&raw->tasklet, + (void (*)(unsigned long)) raw3215_tasklet, + (unsigned long) raw); init_waitqueue_head(&raw->empty_wait); raw3215[line] = raw; } @@ -1095,10 +1091,11 @@ raw->inbuf = (char *) alloc_bootmem_low(RAW3215_INBUF_SIZE); /* Find the first console */ - raw->irq = raw3215_find_dev(0); + raw->irq = irq; raw->flags |= RAW3215_FIXED; - raw->tqueue.routine = raw3215_softint; - raw->tqueue.data = raw; + tasklet_init(&raw->tasklet, + (void (*)(unsigned long)) raw3215_tasklet, + (unsigned long) raw); init_waitqueue_head(&raw->empty_wait); /* Request the console irq */ diff -urN linux-2.5.38/drivers/s390/net/ctctty.c linux-2.5.38-s390/drivers/s390/net/ctctty.c --- linux-2.5.38/drivers/s390/net/ctctty.c Tue Sep 24 17:41:38 2002 +++ linux-2.5.38-s390/drivers/s390/net/ctctty.c Tue Sep 24 17:42:15 2002 @@ -86,7 +86,7 @@ wait_queue_head_t open_wait; wait_queue_head_t close_wait; struct semaphore write_sem; - struct tq_struct tq; + struct tasklet_struct tasklet; struct timer_list stoptimer; } ctc_tty_info; @@ -272,8 +272,7 @@ */ skb_queue_tail(&info->rx_queue, skb); /* Schedule dequeuing */ - queue_task(&info->tq, &tq_immediate); - mark_bh(IMMEDIATE_BH); + tasklet_schedule(&info->tasklet); } static int @@ -390,8 +389,7 @@ skb_reserve(skb, skb_res); *(skb_put(skb, 1)) = c; skb_queue_head(&info->tx_queue, skb); - queue_task(&info->tq, &tq_immediate); - mark_bh(IMMEDIATE_BH); + tasklet_schedule(&info->tasklet); } static void @@ -400,8 +398,7 @@ if (ctc_tty_shuttingdown) return; info->flags |= CTC_ASYNC_TX_LINESTAT; - queue_task(&info->tq, &tq_immediate); - mark_bh(IMMEDIATE_BH); + tasklet_schedule(&info->tasklet); } static void @@ -562,8 +559,7 @@ } if (skb_queue_len(&info->tx_queue)) { info->lsr &= ~UART_LSR_TEMT; - queue_task(&info->tq, &tq_immediate); - mark_bh(IMMEDIATE_BH); + tasklet_schedule(&info->tasklet); } if (from_user) up(&info->write_sem); @@ -624,8 +620,7 @@ return; if (tty->stopped || tty->hw_stopped || (!skb_queue_len(&info->tx_queue))) return; - queue_task(&info->tq, &tq_immediate); - mark_bh(IMMEDIATE_BH); + tasklet_schedule(&info->tasklet); } /* @@ -1161,8 +1156,9 @@ * the lower levels. */ static void -ctc_tty_task(ctc_tty_info *info) +ctc_tty_task(unsigned long arg) { + ctc_tty_info *info = (void *)arg; unsigned long saveflags; int again; @@ -1173,8 +1169,7 @@ info->lsr |= UART_LSR_TEMT; again |= ctc_tty_readmodem(info); if (again) { - queue_task(&info->tq, &tq_immediate); - mark_bh(IMMEDIATE_BH); + tasklet_schedule(&info->tasklet); } } spin_unlock_irqrestore(&ctc_tty_lock, saveflags); @@ -1234,14 +1229,8 @@ for (i = 0; i < CTC_TTY_MAX_DEVICES; i++) { info = &driver->info[i]; init_MUTEX(&info->write_sem); -#if LINUX_VERSION_CODE >= 0x020400 - INIT_LIST_HEAD(&info->tq.list); -#else - info->tq.next = NULL; -#endif - info->tq.sync = 0; - info->tq.routine = (void *)(void *)ctc_tty_task; - info->tq.data = info; + tasklet_init(&info->tasklet, ctc_tty_task, + (unsigned long) info); info->magic = CTC_ASYNC_MAGIC; info->line = i; info->tty = 0; @@ -1322,10 +1311,6 @@ kfree(driver); driver = NULL; } else { - int i; - - for (i = 0; i < CTC_TTY_MAX_DEVICES; i++) - driver->info[i].tq.routine = NULL; tty_unregister_driver(&driver->ctc_tty_device); } spin_unlock_irqrestore(&ctc_tty_lock, saveflags); diff -urN linux-2.5.38/drivers/s390/net/iucv.c linux-2.5.38-s390/drivers/s390/net/iucv.c --- linux-2.5.38/drivers/s390/net/iucv.c Tue Sep 24 17:41:38 2002 +++ linux-2.5.38-s390/drivers/s390/net/iucv.c Tue Sep 24 17:42:15 2002 @@ -41,9 +41,9 @@ #include #include #include -#include #include #include +#include #include #include "iucv.h" #include @@ -99,16 +99,14 @@ static struct list_head iucv_irq_queue; static spinlock_t iucv_irq_queue_lock = SPIN_LOCK_UNLOCKED; -static struct tq_struct iucv_tq; - -static atomic_t iucv_bh_scheduled = ATOMIC_INIT (0); - /* *Internal function prototypes */ -static void iucv_bh_handler(void); +static void iucv_tasklet_handler(unsigned long); static void iucv_irq_handler(struct pt_regs *, __u16); +static DECLARE_TASKLET(iucv_tasklet,iucv_tasklet_handler,0); + /************ FUNCTION ID'S ****************************/ #define ACCEPT 10 @@ -385,11 +383,6 @@ } memset(iucv_param_pool, 0, sizeof(iucv_param) * PARAM_POOL_SIZE); - /* Initialize task queue */ - INIT_LIST_HEAD(&iucv_tq.list); - iucv_tq.sync = 0; - iucv_tq.routine = (void *)iucv_bh_handler; - /* Initialize irq queue */ INIT_LIST_HEAD(&iucv_irq_queue); @@ -2177,7 +2170,7 @@ * @code: irq code * * Handles external interrupts coming in from CP. - * Places the interrupt buffer on a queue and schedules iucv_bh_handler(). + * Places the interrupt buffer on a queue and schedules iucv_tasklet_handler(). */ static void iucv_irq_handler(struct pt_regs *regs, __u16 code) @@ -2200,10 +2193,7 @@ list_add_tail(&irqdata->queue, &iucv_irq_queue); spin_unlock(&iucv_irq_queue_lock); - if (atomic_compare_and_swap (0, 1, &iucv_bh_scheduled) == 0) { - queue_task (&iucv_tq, &tq_immediate); - mark_bh(IMMEDIATE_BH); - } + tasklet_schedule(&iucv_tasklet); irq_exit(); return; @@ -2214,7 +2204,7 @@ * @int_buf: Pointer to copy of external interrupt buffer * * The workhorse for handling interrupts queued by iucv_irq_handler(). - * This function is called from the bottom half iucv_bh_handler(). + * This function is called from the bottom half iucv_tasklet_handler(). */ static void iucv_do_int(iucv_GeneralInterrupt * int_buf) @@ -2384,20 +2374,18 @@ } /** - * iucv_bh_handler: + * iucv_tasklet_handler: * * This function loops over the queue of irq buffers and runs iucv_do_int() * on every queue element. */ static void -iucv_bh_handler(void) +iucv_tasklet_handler(unsigned long ignored) { struct list_head head; struct list_head *next; ulong flags; - atomic_set(&iucv_bh_scheduled, 0); - spin_lock_irqsave(&iucv_irq_queue_lock, flags); list_add(&head, &iucv_irq_queue); list_del_init(&iucv_irq_queue); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/