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-rw-r--r--sys/kern/kern_proc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/kern/kern_proc.c b/sys/kern/kern_proc.c
index dff0514..0e236cb 100644
--- a/sys/kern/kern_proc.c
+++ b/sys/kern/kern_proc.c
@@ -341,7 +341,7 @@ enterpgrp(p, pgid, pgrp, sess)
KASSERT(!SESS_LEADER(p),
("enterpgrp: session leader attempted setpgrp"));
- mtx_init(&pgrp->pg_mtx, "process group", MTX_DEF);
+ mtx_init(&pgrp->pg_mtx, "process group", MTX_DEF|MTX_DUPOK);
if (sess != NULL) {
/*
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