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Subject[PATCH 1/2] sched: make nr_running() return "unsigned int"
I don't anyone have been crazy enough to spawn 2^32 threads.
It'd require absurd amounts of physical memory.

Meanwhile save few bits on REX prefixes.

And remove "extern" from prototypes while I'm at it.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

fs/proc/loadavg.c | 2 +-
fs/proc/stat.c | 2 +-
include/linux/sched/stat.h | 2 +-
kernel/sched/core.c | 4 ++--
4 files changed, 5 insertions(+), 5 deletions(-)

--- a/fs/proc/loadavg.c
+++ b/fs/proc/loadavg.c
@@ -16,7 +16,7 @@ static int loadavg_proc_show(struct seq_file *m, void *v)

get_avenrun(avnrun, FIXED_1/200, 0);

- seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d\n",
+ seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %u/%d %d\n",
LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]),
LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]),
LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]),
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -197,7 +197,7 @@ static int show_stat(struct seq_file *p, void *v)
"\nctxt %llu\n"
"btime %llu\n"
"processes %lu\n"
- "procs_running %lu\n"
+ "procs_running %u\n"
"procs_blocked %lu\n",
nr_context_switches(),
(unsigned long long)boottime.tv_sec,
--- a/include/linux/sched/stat.h
+++ b/include/linux/sched/stat.h
@@ -16,7 +16,7 @@ extern unsigned long total_forks;
extern int nr_threads;
DECLARE_PER_CPU(unsigned long, process_counts);
extern int nr_processes(void);
-extern unsigned long nr_running(void);
+unsigned int nr_running(void);
extern bool single_task_running(void);
extern unsigned long nr_iowait(void);
extern unsigned long nr_iowait_cpu(int cpu);
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3389,9 +3389,9 @@ context_switch(struct rq *rq, struct task_struct *prev,
* externally visible scheduler statistics: current number of runnable
* threads, total number of context switches performed since bootup.
*/
-unsigned long nr_running(void)
+unsigned int nr_running(void)
{
- unsigned long i, sum = 0;
+ unsigned int i, sum = 0;

for_each_online_cpu(i)
sum += cpu_rq(i)->nr_running;
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