diff options
Diffstat (limited to 'kernel/sched/stats.c')
| -rw-r--r-- | kernel/sched/stats.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/kernel/sched/stats.c b/kernel/sched/stats.c index 940b1fa1d2ce..ab112cbfd7c8 100644 --- a/kernel/sched/stats.c +++ b/kernel/sched/stats.c @@ -1,14 +1,13 @@ // SPDX-License-Identifier: GPL-2.0 - -#include <linux/slab.h> -#include <linux/fs.h> -#include <linux/seq_file.h> -#include <linux/proc_fs.h> - +/* + * /proc/schedstat implementation + */ #include "sched.h" /* - * bump this up when changing the output format or the meaning of an existing + * Current schedstat API version. + * + * Bump this up when changing the output format or the meaning of an existing * format, so that tools can adapt (or abort) */ #define SCHEDSTAT_VERSION 15 @@ -78,8 +77,8 @@ static int show_schedstat(struct seq_file *seq, void *v) * This itererator needs some explanation. * It returns 1 for the header position. * This means 2 is cpu 0. - * In a hotplugged system some cpus, including cpu 0, may be missing so we have - * to use cpumask_* to iterate over the cpus. + * In a hotplugged system some CPUs, including cpu 0, may be missing so we have + * to use cpumask_* to iterate over the CPUs. */ static void *schedstat_start(struct seq_file *file, loff_t *offset) { @@ -99,12 +98,14 @@ static void *schedstat_start(struct seq_file *file, loff_t *offset) if (n < nr_cpu_ids) return (void *)(unsigned long)(n + 2); + return NULL; } static void *schedstat_next(struct seq_file *file, void *data, loff_t *offset) { (*offset)++; + return schedstat_start(file, offset); } @@ -134,6 +135,7 @@ static const struct file_operations proc_schedstat_operations = { static int __init proc_schedstat_init(void) { proc_create("schedstat", 0, NULL, &proc_schedstat_operations); + return 0; } subsys_initcall(proc_schedstat_init); |