The patch titled Char: esp, remove hangup and wakeup bottomhalves has been added to the -mm tree. Its filename is char-esp-remove-hangup-and-wakeup-bottomhalves.patch *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this ------------------------------------------------------ Subject: Char: esp, remove hangup and wakeup bottomhalves From: Jiri Slaby <jirislaby@xxxxxxxxx> There is no need to schedule a bottomhalf for either of them. One is fast and the another schedules a bottomhalf itself. Signed-off-by: Jiri Slaby <jirislaby@xxxxxxxxx> Acked-by: Alan Cox <alan@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/char/esp.c | 58 +++---------------------------------- include/linux/hayesesp.h | 4 -- 2 files changed, 5 insertions(+), 57 deletions(-) diff -puN drivers/char/esp.c~char-esp-remove-hangup-and-wakeup-bottomhalves drivers/char/esp.c --- a/drivers/char/esp.c~char-esp-remove-hangup-and-wakeup-bottomhalves +++ a/drivers/char/esp.c @@ -242,17 +242,6 @@ static void rs_start(struct tty_struct * * ----------------------------------------------------------------------- */ -/* - * This routine is used by the interrupt handler to schedule - * processing in the software interrupt portion of the driver. - */ -static inline void rs_sched_event(struct esp_struct *info, - int event) -{ - info->event |= 1 << event; - schedule_work(&info->tqueue); -} - static DEFINE_SPINLOCK(pio_lock); static inline struct esp_pio_buffer *get_pio_buffer(void) @@ -474,7 +463,8 @@ static inline void transmit_chars_pio(st } if (info->xmit_cnt < WAKEUP_CHARS) { - rs_sched_event(info, ESP_EVENT_WRITE_WAKEUP); + if (info->tty) + tty_wakeup(info->tty); #ifdef SERIAL_DEBUG_INTR printk("THRE..."); @@ -512,7 +502,8 @@ static inline void transmit_chars_dma(st info->xmit_tail = (info->xmit_tail + dma_bytes) & (ESP_XMIT_SIZE - 1); if (info->xmit_cnt < WAKEUP_CHARS) { - rs_sched_event(info, ESP_EVENT_WRITE_WAKEUP); + if (info->tty) + tty_wakeup(info->tty); #ifdef SERIAL_DEBUG_INTR printk("THRE..."); @@ -604,7 +595,7 @@ static inline void check_modem_status(st #ifdef SERIAL_DEBUG_OPEN printk("scheduling hangup..."); #endif - schedule_work(&info->tqueue_hangup); + tty_hangup(info->tty); } } } @@ -720,41 +711,6 @@ static irqreturn_t rs_interrupt_single(i * ------------------------------------------------------------------- */ -static void do_softint(struct work_struct *work) -{ - struct esp_struct *info = - container_of(work, struct esp_struct, tqueue); - struct tty_struct *tty; - - tty = info->tty; - if (!tty) - return; - - if (test_and_clear_bit(ESP_EVENT_WRITE_WAKEUP, &info->event)) { - tty_wakeup(tty); - } -} - -/* - * This routine is called from the scheduler tqueue when the interrupt - * routine has signalled that a hangup has occurred. The path of - * hangup processing is: - * - * serial interrupt routine -> (scheduler tqueue) -> - * do_serial_hangup() -> tty->hangup() -> esp_hangup() - * - */ -static void do_serial_hangup(struct work_struct *work) -{ - struct esp_struct *info = - container_of(work, struct esp_struct, tqueue_hangup); - struct tty_struct *tty; - - tty = info->tty; - if (tty) - tty_hangup(tty); -} - /* * --------------------------------------------------------------- * Low level utility subroutines for the serial driver: routines to @@ -2038,7 +1994,6 @@ static void rs_close(struct tty_struct * tty->driver->flush_buffer(tty); tty_ldisc_flush(tty); tty->closing = 0; - info->event = 0; info->tty = NULL; if (info->blocked_open) { @@ -2106,7 +2061,6 @@ static void esp_hangup(struct tty_struct rs_flush_buffer(tty); shutdown(info); - info->event = 0; info->count = 0; info->flags &= ~ASYNC_NORMAL_ACTIVE; info->tty = NULL; @@ -2492,8 +2446,6 @@ static int __init espserial_init(void) info->magic = ESP_MAGIC; info->close_delay = 5*HZ/10; info->closing_wait = 30*HZ; - INIT_WORK(&info->tqueue, do_softint); - INIT_WORK(&info->tqueue_hangup, do_serial_hangup); info->config.rx_timeout = rx_timeout; info->config.flow_on = flow_on; info->config.flow_off = flow_off; diff -puN include/linux/hayesesp.h~char-esp-remove-hangup-and-wakeup-bottomhalves include/linux/hayesesp.h --- a/include/linux/hayesesp.h~char-esp-remove-hangup-and-wakeup-bottomhalves +++ a/include/linux/hayesesp.h @@ -71,7 +71,6 @@ struct hayes_esp_config { #define ESP_STAT_NEVER_DMA 0x08 #define ESP_STAT_USE_PIO 0x10 -#define ESP_EVENT_WRITE_WAKEUP 0 #define ESP_MAGIC 0x53ee #define ESP_XMIT_SIZE 4096 @@ -92,7 +91,6 @@ struct esp_struct { unsigned short closing_wait2; int IER; /* Interrupt Enable Register */ int MCR; /* Modem control register */ - unsigned long event; unsigned long last_active; int line; int count; /* # of fd on device */ @@ -101,8 +99,6 @@ struct esp_struct { int xmit_head; int xmit_tail; int xmit_cnt; - struct work_struct tqueue; - struct work_struct tqueue_hangup; wait_queue_head_t open_wait; wait_queue_head_t close_wait; wait_queue_head_t delta_msr_wait; _ Patches currently in -mm which might be from jirislaby@xxxxxxxxx are fs-sysfs-remove-spin_lock_unlocked.patch net-sunrpc-remove-spin_lock_unlocked.patch net-ibm_newemac-remove-spin_lock_unlocked.patch sbus-cpwatchdog-remove-spin_lock_unlocked.patch watchdog-bfin_wdt-remove-spin_lock_unlocked.patch git-wireless.patch crisv10-serial-driver-rewrite-take-three.patch dzh-remove-useless-unused-module-junk.patch dz-always-check-if-it-is-safe-to-console_putchar.patch dz-dont-panic-when-request_irq-fails.patch dz-add-and-reorder-inclusions-remove-unneeded-ones.patch dz-update-kconfig-description.patch dz-rename-the-serial-console-structure.patch dz-fix-locking-issues.patch dz-handle-special-conditions-on-reception-correctly.patch maintainers-add-self-for-the-dz-serial-driver.patch char-rocket-switch-long-delay-to-sleep.patch char-rocket-printk-cleanup.patch char-rocket-remove-useless-macros.patch char-char-serial-remove-serial_type_normal-redefines.patch char-mxser_new-ioaddresses-are-ulong.patch char-stallion-fix-compiler-warnings.patch char-riscom8-change-rc_init_drivers-prototype.patch char-esp-remove-hangup-and-wakeup-bottomhalves.patch char-istallion-remove-hangup-bottomhalf.patch char-specialix-remove-bottomhalves.patch char-stallion-remove-bottomhalf.patch char-serial167-remove-bottomhalf.patch char-riscom8-remove-wakeup-anf-hangup-bottomhalves.patch reiser4.patch shrink_slab-handle-bad-shrinkers.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html