Commit | Line | Data |
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a9caa3de | 1 | #include <linux/fs.h> |
96177602 AD |
2 | #include <linux/init.h> |
3 | #include <linux/proc_fs.h> | |
4 | #include <linux/sched.h> | |
a9caa3de | 5 | #include <linux/seq_file.h> |
96177602 | 6 | #include <linux/time.h> |
96830a57 | 7 | #include <linux/kernel_stat.h> |
96177602 AD |
8 | #include <asm/cputime.h> |
9 | ||
a9caa3de | 10 | static int uptime_proc_show(struct seq_file *m, void *v) |
96177602 AD |
11 | { |
12 | struct timespec uptime; | |
13 | struct timespec idle; | |
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14 | int i; |
15 | cputime_t idletime = cputime_zero; | |
16 | ||
17 | for_each_possible_cpu(i) | |
18 | idletime = cputime64_add(idletime, kstat_cpu(i).cpustat.idle); | |
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19 | |
20 | do_posix_clock_monotonic_gettime(&uptime); | |
21 | monotonic_to_bootbased(&uptime); | |
22 | cputime_to_timespec(idletime, &idle); | |
a9caa3de | 23 | seq_printf(m, "%lu.%02lu %lu.%02lu\n", |
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24 | (unsigned long) uptime.tv_sec, |
25 | (uptime.tv_nsec / (NSEC_PER_SEC / 100)), | |
26 | (unsigned long) idle.tv_sec, | |
27 | (idle.tv_nsec / (NSEC_PER_SEC / 100))); | |
a9caa3de | 28 | return 0; |
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29 | } |
30 | ||
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31 | static int uptime_proc_open(struct inode *inode, struct file *file) |
32 | { | |
33 | return single_open(file, uptime_proc_show, NULL); | |
34 | } | |
35 | ||
36 | static const struct file_operations uptime_proc_fops = { | |
37 | .open = uptime_proc_open, | |
38 | .read = seq_read, | |
39 | .llseek = seq_lseek, | |
40 | .release = single_release, | |
41 | }; | |
42 | ||
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43 | static int __init proc_uptime_init(void) |
44 | { | |
a9caa3de | 45 | proc_create("uptime", 0, NULL, &uptime_proc_fops); |
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46 | return 0; |
47 | } | |
48 | module_init(proc_uptime_init); |