PERFORCE change 112499 for review

[Roman Divacky]

http://perforce.freebsd.org/chv.cgi?CH=112499

Change 112499 by rdivacky at rdivacky_witten on 2007/01/04 22:31:44

	Protect em->shared in a case of CLONE_THREAD.

Affected files ...

.. //depot/projects/linuxolator/src/sys/compat/linux/linux_emul.c#19 edit

Differences ...

==== //depot/projects/linuxolator/src/sys/compat/linux/linux_emul.c#19 (text+ko) ====

@@ -119,10 +119,12 @@
 	if (child != 0) {
 		if (flags & CLONE_THREAD) {
 			/* lookup the parent */
+		   	EMUL_SHARED_WLOCK(&emul_shared_lock);
 			p_em = em_find(td->td_proc, EMUL_DONTLOCK);
 			KASSERT(p_em != NULL, ("proc_init: parent emuldata not found for CLONE_THREAD\n"));
 			em->shared = p_em->shared;
 			em->shared->refs++;
+		   	EMUL_SHARED_WUNLOCK(&emul_shared_lock);
 		} else {
 			/*
 			 * handled earlier to avoid malloc(M_WAITOK) with