From: liaohua <liaohua4@xxxxxxxxxx> This moves latencytop sysctl to kernel/latencytop.c Signed-off-by: liaohua <liaohua4@xxxxxxxxxx> ------ v3: Base the patch on the latest sysctl-next and resubmit. v2: https://lore.kernel.org/lkml/20220223094710.103378-1-liaohua4@xxxxxxxxxx/ Move latencytop sysctl to its own file base based on sysctl-next. v1: https://lore.kernel.org/lkml/20220219072433.86983-1-liaohua4@xxxxxxxxxx/ Move latencytop sysctl to its own file base based on linux master. --- include/linux/latencytop.h | 3 --- kernel/latencytop.c | 41 +++++++++++++++++++++++++++++------------ kernel/sysctl.c | 10 ---------- 3 files changed, 29 insertions(+), 25 deletions(-) diff --git a/include/linux/latencytop.h b/include/linux/latencytop.h index abe3d95f795b..84f1053cf2a8 100644 --- a/include/linux/latencytop.h +++ b/include/linux/latencytop.h @@ -38,9 +38,6 @@ account_scheduler_latency(struct task_struct *task, int usecs, int inter) void clear_tsk_latency_tracing(struct task_struct *p); -int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, - size_t *lenp, loff_t *ppos); - #else static inline void diff --git a/kernel/latencytop.c b/kernel/latencytop.c index 166d7bf49666..76166df011a4 100644 --- a/kernel/latencytop.c +++ b/kernel/latencytop.c @@ -55,6 +55,7 @@ #include <linux/sched/stat.h> #include <linux/list.h> #include <linux/stacktrace.h> +#include <linux/sysctl.h> static DEFINE_RAW_SPINLOCK(latency_lock); @@ -63,6 +64,31 @@ static struct latency_record latency_record[MAXLR]; int latencytop_enabled; +#ifdef CONFIG_SYSCTL +static int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, + size_t *lenp, loff_t *ppos) +{ + int err; + + err = proc_dointvec(table, write, buffer, lenp, ppos); + if (latencytop_enabled) + force_schedstat_enabled(); + + return err; +} + +static struct ctl_table latencytop_sysctl[] = { + { + .procname = "latencytop", + .data = &latencytop_enabled, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = sysctl_latencytop, + }, + {} +}; +#endif + void clear_tsk_latency_tracing(struct task_struct *p) { unsigned long flags; @@ -266,18 +292,9 @@ static const struct proc_ops lstats_proc_ops = { static int __init init_lstats_procfs(void) { proc_create("latency_stats", 0644, NULL, &lstats_proc_ops); +#ifdef CONFIG_SYSCTL + register_sysctl_init("kernel", latencytop_sysctl); +#endif return 0; } - -int sysctl_latencytop(struct ctl_table *table, int write, void *buffer, - size_t *lenp, loff_t *ppos) -{ - int err; - - err = proc_dointvec(table, write, buffer, lenp, ppos); - if (latencytop_enabled) - force_schedstat_enabled(); - - return err; -} device_initcall(init_lstats_procfs); diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 21172d3dad6e..2db637ca91c9 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -65,7 +65,6 @@ #include <linux/bpf.h> #include <linux/mount.h> #include <linux/userfaultfd_k.h> -#include <linux/latencytop.h> #include <linux/pid.h> #include "../lib/kstrtox.h" @@ -1685,15 +1684,6 @@ static struct ctl_table kern_table[] = { .extra2 = SYSCTL_ONE, }, #endif -#ifdef CONFIG_LATENCYTOP - { - .procname = "latencytop", - .data = &latencytop_enabled, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = sysctl_latencytop, - }, -#endif { .procname = "print-fatal-signals", .data = &print_fatal_signals, -- 2.12.3
