From 940b241d9050fc354f68c182e99fc3da1ff36bc0 Mon Sep 17 00:00:00 2001 From: Anton Ivanov Date: Tue, 13 Nov 2018 15:08:02 +0000 Subject: [PATCH] um: Remove obsolete reenable_XX calls reenable_fd has been a NOP since the introduction of the EPOLL based interrupt controller. reenable_channel() is no longer needed as the flow control is now handled via the write IRQs on the channel. Signed-off-by: Anton Ivanov Signed-off-by: Richard Weinberger --- arch/um/drivers/chan_kern.c | 10 ---------- arch/um/drivers/line.c | 10 ---------- arch/um/drivers/mconsole_kern.c | 2 -- arch/um/drivers/net_kern.c | 2 -- arch/um/drivers/port_kern.c | 1 - arch/um/drivers/random.c | 1 - arch/um/drivers/ubd_kern.c | 1 - arch/um/include/shared/irq_user.h | 1 - arch/um/kernel/irq.c | 6 ------ arch/um/kernel/sigio.c | 1 - 10 files changed, 35 deletions(-) diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c index 05588f9466c7..a4e64edb8f38 100644 --- a/arch/um/drivers/chan_kern.c +++ b/arch/um/drivers/chan_kern.c @@ -211,12 +211,6 @@ void deactivate_chan(struct chan *chan, int irq) deactivate_fd(chan->fd, irq); } -void reactivate_chan(struct chan *chan, int irq) -{ - if (chan && chan->enabled) - reactivate_fd(chan->fd, irq); -} - int write_chan(struct chan *chan, const char *buf, int len, int write_irq) { @@ -228,8 +222,6 @@ int write_chan(struct chan *chan, const char *buf, int len, n = chan->ops->write(chan->fd, buf, len, chan->data); if (chan->primary) { ret = n; - if ((ret == -EAGAIN) || ((ret >= 0) && (ret < len))) - reactivate_fd(chan->fd, write_irq); } return ret; } @@ -527,8 +519,6 @@ void chan_interrupt(struct line *line, int irq) tty_insert_flip_char(port, c, TTY_NORMAL); } while (err > 0); - if (err == 0) - reactivate_fd(chan->fd, irq); if (err == -EIO) { if (chan->primary) { tty_port_tty_hangup(&line->port, false); diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 7e524efed584..e0e63931fb2b 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -235,14 +235,6 @@ void line_unthrottle(struct tty_struct *tty) line->throttled = 0; chan_interrupt(line, line->driver->read_irq); - - /* - * Maybe there is enough stuff pending that calling the interrupt - * throttles us again. In this case, line->throttled will be 1 - * again and we shouldn't turn the interrupt back on. - */ - if (!line->throttled) - reactivate_chan(line->chan_in, line->driver->read_irq); } static irqreturn_t line_write_interrupt(int irq, void *data) @@ -667,8 +659,6 @@ static irqreturn_t winch_interrupt(int irq, void *data) tty_kref_put(tty); } out: - if (winch->fd != -1) - reactivate_fd(winch->fd, WINCH_IRQ); return IRQ_HANDLED; } diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index d5f9a2d1da1b..ff3ab72fd90f 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -96,7 +96,6 @@ static irqreturn_t mconsole_interrupt(int irq, void *dev_id) } if (!list_empty(&mc_requests)) schedule_work(&mconsole_work); - reactivate_fd(fd, MCONSOLE_IRQ); return IRQ_HANDLED; } @@ -240,7 +239,6 @@ void mconsole_stop(struct mc_request *req) (*req->cmd->handler)(req); } os_set_fd_block(req->originating_fd, 0); - reactivate_fd(req->originating_fd, MCONSOLE_IRQ); mconsole_reply(req, "", 0, 0); } diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c index 624cb47cc9cd..d80cfb1d9430 100644 --- a/arch/um/drivers/net_kern.c +++ b/arch/um/drivers/net_kern.c @@ -137,8 +137,6 @@ static irqreturn_t uml_net_interrupt(int irq, void *dev_id) schedule_work(&lp->work); goto out; } - reactivate_fd(lp->fd, UM_ETH_IRQ); - out: spin_unlock(&lp->lock); return IRQ_HANDLED; diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c index 40ca5cc275e9..b0e9ff35daee 100644 --- a/arch/um/drivers/port_kern.c +++ b/arch/um/drivers/port_kern.c @@ -137,7 +137,6 @@ static void port_work_proc(struct work_struct *unused) if (!port->has_connection) continue; - reactivate_fd(port->fd, ACCEPT_IRQ); while (port_accept(port)) ; port->has_connection = 0; diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c index 778a0e52d5a5..1d5d3057e6f1 100644 --- a/arch/um/drivers/random.c +++ b/arch/um/drivers/random.c @@ -73,7 +73,6 @@ static ssize_t rng_dev_read (struct file *filp, char __user *buf, size_t size, return ret ? : -EAGAIN; atomic_inc(&host_sleep_count); - reactivate_fd(random_fd, RANDOM_IRQ); add_sigio_fd(random_fd); add_wait_queue(&host_read_wait, &wait); diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c index 7aaa473909be..a4a41421c5e2 100644 --- a/arch/um/drivers/ubd_kern.c +++ b/arch/um/drivers/ubd_kern.c @@ -533,7 +533,6 @@ static void ubd_handler(void) kfree(io_req); } } - reactivate_fd(thread_fd, UBD_IRQ); } static irqreturn_t ubd_intr(int irq, void *dev) diff --git a/arch/um/include/shared/irq_user.h b/arch/um/include/shared/irq_user.h index a7a6120f19d5..e7242a0ae489 100644 --- a/arch/um/include/shared/irq_user.h +++ b/arch/um/include/shared/irq_user.h @@ -31,7 +31,6 @@ struct irq_fd { struct siginfo; extern void sigio_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs); extern void free_irq_by_fd(int fd); -extern void reactivate_fd(int fd, int irqnum); extern void deactivate_fd(int fd, int irqnum); extern int deactivate_all_fds(void); extern int activate_ipi(int fd, int pid); diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index 8360fa3f676d..f4874b7ec503 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -350,11 +350,6 @@ static void free_irq_by_irq_and_dev(unsigned int irq, void *dev) } -void reactivate_fd(int fd, int irqnum) -{ - /** NOP - we do auto-EOI now **/ -} - void deactivate_fd(int fd, int irqnum) { struct irq_entry *to_free; @@ -449,7 +444,6 @@ int um_request_irq(unsigned int irq, int fd, int type, } EXPORT_SYMBOL(um_request_irq); -EXPORT_SYMBOL(reactivate_fd); /* * irq_chip must define at least enable/disable and ack when diff --git a/arch/um/kernel/sigio.c b/arch/um/kernel/sigio.c index b5e0cbb34382..3fb6a4041ed6 100644 --- a/arch/um/kernel/sigio.c +++ b/arch/um/kernel/sigio.c @@ -16,7 +16,6 @@ static irqreturn_t sigio_interrupt(int irq, void *data) char c; os_read_file(sigio_irq_fd, &c, sizeof(c)); - reactivate_fd(sigio_irq_fd, SIGIO_WRITE_IRQ); return IRQ_HANDLED; } -- 2.20.1