diff options
Diffstat (limited to 'arch/um/kernel/sigio.c')
| -rw-r--r-- | arch/um/kernel/sigio.c | 35 |
1 files changed, 4 insertions, 31 deletions
diff --git a/arch/um/kernel/sigio.c b/arch/um/kernel/sigio.c index b5e0cbb34382..4fc04742048a 100644 --- a/arch/um/kernel/sigio.c +++ b/arch/um/kernel/sigio.c @@ -1,6 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com) - * Licensed under the GPL */ #include <linux/interrupt.h> @@ -8,42 +8,15 @@ #include <os.h> #include <sigio.h> -/* Protected by sigio_lock() called from write_sigio_workaround */ -static int sigio_irq_fd = -1; - -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; -} - -int write_sigio_irq(int fd) -{ - int err; - - err = um_request_irq(SIGIO_WRITE_IRQ, fd, IRQ_READ, sigio_interrupt, - 0, "write sigio", NULL); - if (err) { - printk(KERN_ERR "write_sigio_irq : um_request_irq failed, " - "err = %d\n", err); - return -1; - } - sigio_irq_fd = fd; - return 0; -} - /* These are called from os-Linux/sigio.c to protect its pollfds arrays. */ -static DEFINE_SPINLOCK(sigio_spinlock); +static DEFINE_MUTEX(sigio_mutex); void sigio_lock(void) { - spin_lock(&sigio_spinlock); + mutex_lock(&sigio_mutex); } void sigio_unlock(void) { - spin_unlock(&sigio_spinlock); + mutex_unlock(&sigio_mutex); } |