Cregit: Linux 7.0: inlineloop.c

Contributors: 6
Author	Tokens	Token Proportion	Commits	Commit Proportion
Ian Rogers	159	85.95%	2	18.18%
Arnaldo Carvalho de Melo	10	5.41%	3	27.27%
Ingo Molnar	9	4.86%	3	27.27%
Jiri Olsa	3	1.62%	1	9.09%
Adrian Hunter	3	1.62%	1	9.09%
Greg Kroah-Hartman	1	0.54%	1	9.09%
Total	185		11

// SPDX-License-Identifier: GPL-2.0
#include <pthread.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <linux/compiler.h>
#include "../tests.h"

static volatile int a;
static volatile sig_atomic_t done;

static void sighandler(int sig __maybe_unused)
{
	done = 1;
}

static inline void __attribute__((always_inline)) leaf(int b)
{
again:
	a += b;
	if (!done)
		goto again;
}

static inline void __attribute__((always_inline)) middle(int b)
{
	leaf(b);
}

static noinline void parent(int b)
{
	middle(b);
}

static int inlineloop(int argc, const char **argv)
{
	int sec = 1;

	pthread_setname_np(pthread_self(), "perf-inlineloop");
	if (argc > 0)
		sec = atoi(argv[0]);

	signal(SIGINT, sighandler);
	signal(SIGALRM, sighandler);
	alarm(sec);

	parent(sec);

	return 0;
}

DEFINE_WORKLOAD(inlineloop);