libata: improve post-reset device ready test
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / proc / kmsg.c
blobff3b90b56e9d635546fe71868ffdc473632c5352
1 /*
2 * linux/fs/proc/kmsg.c
4 * Copyright (C) 1992 by Linus Torvalds
6 */
8 #include <linux/types.h>
9 #include <linux/errno.h>
10 #include <linux/time.h>
11 #include <linux/kernel.h>
12 #include <linux/poll.h>
13 #include <linux/fs.h>
15 #include <asm/uaccess.h>
16 #include <asm/io.h>
18 extern wait_queue_head_t log_wait;
20 extern int do_syslog(int type, char __user *bug, int count);
22 static int kmsg_open(struct inode * inode, struct file * file)
24 return do_syslog(1,NULL,0);
27 static int kmsg_release(struct inode * inode, struct file * file)
29 (void) do_syslog(0,NULL,0);
30 return 0;
33 static ssize_t kmsg_read(struct file *file, char __user *buf,
34 size_t count, loff_t *ppos)
36 if ((file->f_flags & O_NONBLOCK) && !do_syslog(9, NULL, 0))
37 return -EAGAIN;
38 return do_syslog(2, buf, count);
41 static unsigned int kmsg_poll(struct file *file, poll_table *wait)
43 poll_wait(file, &log_wait, wait);
44 if (do_syslog(9, NULL, 0))
45 return POLLIN | POLLRDNORM;
46 return 0;
50 const struct file_operations proc_kmsg_operations = {
51 .read = kmsg_read,
52 .poll = kmsg_poll,
53 .open = kmsg_open,
54 .release = kmsg_release,