Git Repo - linux.git/blame_incremental

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Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0
	2	#include <linux/fs.h>
	3	#include <linux/init.h>
	4	#include <linux/proc_fs.h>
	5	#include <linux/sched.h>
	6	#include <linux/seq_file.h>
	7	#include <linux/time.h>
	8	#include <linux/kernel_stat.h>
	9
	10	static int uptime_proc_show(struct seq_file m, void v)
	11	{
	12	struct timespec64 uptime;
	13	struct timespec64 idle;
	14	u64 nsec;
	15	u32 rem;
	16	int i;
	17
	18	nsec = 0;
	19	for_each_possible_cpu(i)
	20	nsec += (__force u64) kcpustat_cpu(i).cpustat[CPUTIME_IDLE];
	21
	22	ktime_get_boottime_ts64(&uptime);
	23	idle.tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
	24	idle.tv_nsec = rem;
	25	seq_printf(m, "%lu.%02lu %lu.%02lu\n",
	26	(unsigned long) uptime.tv_sec,
	27	(uptime.tv_nsec / (NSEC_PER_SEC / 100)),
	28	(unsigned long) idle.tv_sec,
	29	(idle.tv_nsec / (NSEC_PER_SEC / 100)));
	30	return 0;
	31	}
	32
	33	static int __init proc_uptime_init(void)
	34	{
	35	proc_create_single("uptime", 0, NULL, uptime_proc_show);
	36	return 0;
	37	}
	38	fs_initcall(proc_uptime_init);