1/*
 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
 3 * Licensed under the GPL
 4 */
 5
 6#include <linux/interrupt.h>
 7#include <irq_kern.h>
 8#include <os.h>
 9#include <sigio.h>
10
11/* Protected by sigio_lock() called from write_sigio_workaround */
12static int sigio_irq_fd = -1;
13
14static irqreturn_t sigio_interrupt(int irq, void *data)
15{
16	char c;
17
18	os_read_file(sigio_irq_fd, &c, sizeof(c));
19	reactivate_fd(sigio_irq_fd, SIGIO_WRITE_IRQ);
20	return IRQ_HANDLED;
21}
22
23int write_sigio_irq(int fd)
24{
25	int err;
26
27	err = um_request_irq(SIGIO_WRITE_IRQ, fd, IRQ_READ, sigio_interrupt,
28			     0, "write sigio", NULL);
 
29	if (err) {
30		printk(KERN_ERR "write_sigio_irq : um_request_irq failed, "
31		       "err = %d\n", err);
32		return -1;
33	}
34	sigio_irq_fd = fd;
35	return 0;
36}
37
38/* These are called from os-Linux/sigio.c to protect its pollfds arrays. */
39static DEFINE_SPINLOCK(sigio_spinlock);
40
41void sigio_lock(void)
42{
43	spin_lock(&sigio_spinlock);
44}
45
46void sigio_unlock(void)
47{
48	spin_unlock(&sigio_spinlock);
49}

 1/*
 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
 3 * Licensed under the GPL
 4 */
 5
 6#include <linux/interrupt.h>
 7#include "irq_kern.h"
 8#include "os.h"
 9#include "sigio.h"
10
11/* Protected by sigio_lock() called from write_sigio_workaround */
12static int sigio_irq_fd = -1;
13
14static irqreturn_t sigio_interrupt(int irq, void *data)
15{
16	char c;
17
18	os_read_file(sigio_irq_fd, &c, sizeof(c));
19	reactivate_fd(sigio_irq_fd, SIGIO_WRITE_IRQ);
20	return IRQ_HANDLED;
21}
22
23int write_sigio_irq(int fd)
24{
25	int err;
26
27	err = um_request_irq(SIGIO_WRITE_IRQ, fd, IRQ_READ, sigio_interrupt,
28			     IRQF_SAMPLE_RANDOM, "write sigio",
29			     NULL);
30	if (err) {
31		printk(KERN_ERR "write_sigio_irq : um_request_irq failed, "
32		       "err = %d\n", err);
33		return -1;
34	}
35	sigio_irq_fd = fd;
36	return 0;
37}
38
39/* These are called from os-Linux/sigio.c to protect its pollfds arrays. */
40static DEFINE_SPINLOCK(sigio_spinlock);
41
42void sigio_lock(void)
43{
44	spin_lock(&sigio_spinlock);
45}
46
47void sigio_unlock(void)
48{
49	spin_unlock(&sigio_spinlock);
50}