add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/proc/uptime.c
..
..
@@ -5,22 +5,29 @@
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 #include <linux/sched.h>
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 #include <linux/seq_file.h>
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 #include <linux/time.h>
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+#include <linux/time_namespace.h>
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 #include <linux/kernel_stat.h>
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 static int uptime_proc_show(struct seq_file *m, void *v)
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 {
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 	struct timespec64 uptime;
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 	struct timespec64 idle;
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-	u64 nsec;
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+	u64 idle_nsec;
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 	u32 rem;
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 	int i;
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-	nsec = 0;
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-	for_each_possible_cpu(i)
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-		nsec += (__force u64) kcpustat_cpu(i).cpustat[CPUTIME_IDLE];
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+	idle_nsec = 0;
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+	for_each_possible_cpu(i) {
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+		struct kernel_cpustat kcs;
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+
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+		kcpustat_cpu_fetch(&kcs, i);
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+		idle_nsec += get_idle_time(&kcs, i);
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+	}
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 	ktime_get_boottime_ts64(&uptime);
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-	idle.tv_sec = div_u64_rem(nsec, NSEC_PER_SEC, &rem);
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+	timens_add_boottime(&uptime);
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+
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+	idle.tv_sec = div_u64_rem(idle_nsec, NSEC_PER_SEC, &rem);
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 	idle.tv_nsec = rem;
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 	seq_printf(m, "%lu.%02lu %lu.%02lu\n",
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 			(unsigned long) uptime.tv_sec,