linux/kernel/exit.h

// SPDX-License-Identifier: GPL-2.0-only
#ifndef LINUX_WAITID_H
#define LINUX_WAITID_H

struct waitid_info { … };

struct wait_opts { … };

bool pid_child_should_wake(struct wait_opts *wo, struct task_struct *p);
long __do_wait(struct wait_opts *wo);
int kernel_waitid_prepare(struct wait_opts *wo, int which, pid_t upid,
			  struct waitid_info *infop, int options,
			  struct rusage *ru);
#endif