From a9266094f229bf84c1ae8256db9430654c62c7cf Mon Sep 17 00:00:00 2001
From: netchild <netchild@FreeBSD.org>
Date: Sun, 15 Oct 2006 13:39:40 +0000
Subject: MFP4 (106538 + 106541): Implement CLONE_VFORK. This fixes the clone05
 LTP test.

Submitted by:	rdivacky
---
 sys/i386/linux/linux_machdep.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'sys/i386/linux/linux_machdep.c')

diff --git a/sys/i386/linux/linux_machdep.c b/sys/i386/linux/linux_machdep.c
index 849170b..cef0124 100644
--- a/sys/i386/linux/linux_machdep.c
+++ b/sys/i386/linux/linux_machdep.c
@@ -532,6 +532,16 @@ linux_clone(struct thread *td, struct linux_clone_args *args)
 
 	td->td_retval[0] = p2->p_pid;
 	td->td_retval[1] = 0;
+
+	if (args->flags & CLONE_VFORK) {
+   	   	/* wait for the children to exit, ie. emulate vfork */
+   	   	PROC_LOCK(p2);
+		p2->p_flag |= P_PPWAIT;
+		while (p2->p_flag & P_PPWAIT)
+   		   	msleep(td->td_proc, &p2->p_mtx, PWAIT, "ppwait", 0);
+		PROC_UNLOCK(p2);
+	}
+
 	return (0);
 }
 
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