original comment: +Wilson03172004,marked due to this pci host does not support MWI
[linux-2.4.git] / fs / proc / kmsg.c
1 /*
2  *  linux/fs/proc/kmsg.c
3  *
4  *  Copyright (C) 1992  by Linus Torvalds
5  *
6  */
7
8 #include <linux/types.h>
9 #include <linux/errno.h>
10 #include <linux/sched.h>
11 #include <linux/kernel.h>
12 #include <linux/poll.h>
13
14 #include <asm/uaccess.h>
15 #include <asm/io.h>
16
17 extern wait_queue_head_t log_wait;
18
19 extern int do_syslog(int type, char * bug, int count);
20
21 static int kmsg_open(struct inode * inode, struct file * file)
22 {
23         return do_syslog(1,NULL,0);
24 }
25
26 static int kmsg_release(struct inode * inode, struct file * file)
27 {
28         (void) do_syslog(0,NULL,0);
29         return 0;
30 }
31
32 static ssize_t kmsg_read(struct file * file, char * buf,
33                          size_t count, loff_t *ppos)
34 {
35         return do_syslog(2,buf,count);
36 }
37
38 static unsigned int kmsg_poll(struct file *file, poll_table * wait)
39 {
40         poll_wait(file, &log_wait, wait);
41         if (do_syslog(9, 0, 0))
42                 return POLLIN | POLLRDNORM;
43         return 0;
44 }
45
46
47 struct file_operations proc_kmsg_operations = {
48         read:           kmsg_read,
49         poll:           kmsg_poll,
50         open:           kmsg_open,
51         release:        kmsg_release,
52 };