V4L/DVB (10433): cx18: Defer A/V core initialization until a valid cx18_av_cmd arrives
[linux-2.6/mini2440.git] / fs / proc / uptime.c
blobdf26aa88fa47cd46731f506d270d2faafc2e1fbd
1 #include <linux/init.h>
2 #include <linux/proc_fs.h>
3 #include <linux/sched.h>
4 #include <linux/time.h>
5 #include <asm/cputime.h>
7 static int proc_calc_metrics(char *page, char **start, off_t off,
8 int count, int *eof, int len)
10 if (len <= off + count)
11 *eof = 1;
12 *start = page + off;
13 len -= off;
14 if (len > count)
15 len = count;
16 if (len < 0)
17 len = 0;
18 return len;
21 static int uptime_read_proc(char *page, char **start, off_t off, int count,
22 int *eof, void *data)
24 struct timespec uptime;
25 struct timespec idle;
26 int len;
27 cputime_t idletime = cputime_add(init_task.utime, init_task.stime);
29 do_posix_clock_monotonic_gettime(&uptime);
30 monotonic_to_bootbased(&uptime);
31 cputime_to_timespec(idletime, &idle);
32 len = sprintf(page, "%lu.%02lu %lu.%02lu\n",
33 (unsigned long) uptime.tv_sec,
34 (uptime.tv_nsec / (NSEC_PER_SEC / 100)),
35 (unsigned long) idle.tv_sec,
36 (idle.tv_nsec / (NSEC_PER_SEC / 100)));
37 return proc_calc_metrics(page, start, off, count, eof, len);
40 static int __init proc_uptime_init(void)
42 create_proc_read_entry("uptime", 0, NULL, uptime_read_proc, NULL);
43 return 0;
45 module_init(proc_uptime_init);