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https://github.com/torvalds/linux
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7d489d15ce
Convert the core timekeeping logic to use timespec64s. This moves the 2038 issues out of the core logic and into all of the accessor functions. Future changes will need to push the timespec64s out to all timekeeping users, but that can be done interface by interface. Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <john.stultz@linaro.org>
74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
/*
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* debugfs file to track time spent in suspend
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*
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* Copyright (c) 2011, Google, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include <linux/debugfs.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/seq_file.h>
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#include <linux/time.h>
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#include "timekeeping_internal.h"
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static unsigned int sleep_time_bin[32] = {0};
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static int tk_debug_show_sleep_time(struct seq_file *s, void *data)
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{
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unsigned int bin;
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seq_puts(s, " time (secs) count\n");
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seq_puts(s, "------------------------------\n");
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for (bin = 0; bin < 32; bin++) {
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if (sleep_time_bin[bin] == 0)
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continue;
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seq_printf(s, "%10u - %-10u %4u\n",
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bin ? 1 << (bin - 1) : 0, 1 << bin,
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sleep_time_bin[bin]);
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}
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return 0;
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}
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static int tk_debug_sleep_time_open(struct inode *inode, struct file *file)
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{
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return single_open(file, tk_debug_show_sleep_time, NULL);
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}
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static const struct file_operations tk_debug_sleep_time_fops = {
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.open = tk_debug_sleep_time_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int __init tk_debug_sleep_time_init(void)
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{
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struct dentry *d;
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d = debugfs_create_file("sleep_time", 0444, NULL, NULL,
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&tk_debug_sleep_time_fops);
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if (!d) {
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pr_err("Failed to create sleep_time debug file\n");
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return -ENOMEM;
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}
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return 0;
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}
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late_initcall(tk_debug_sleep_time_init);
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void tk_debug_account_sleep_time(struct timespec64 *t)
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{
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sleep_time_bin[fls(t->tv_sec)]++;
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}
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