diff --git a/sys/alpha/alpha/machdep.c b/sys/alpha/alpha/machdep.c
index bbfe946df2f..0b79c685bb2 100644
--- a/sys/alpha/alpha/machdep.c
+++ b/sys/alpha/alpha/machdep.c
@@ -1012,6 +1012,7 @@ alpha_init(pfn, ptb, bim, bip, biv)
 	 */
 	mtx_init(&Giant, "Giant", MTX_DEF | MTX_RECURSE);
 	mtx_init(&sched_lock, "sched lock", MTX_SPIN | MTX_RECURSE);
+	mtx_init(&proc0.p_mtx, "process lock", MTX_DEF);
 	mtx_lock(&Giant);
 
 	/*
diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c
index ea1703ce017..cbf95ccbc18 100644
--- a/sys/amd64/amd64/machdep.c
+++ b/sys/amd64/amd64/machdep.c
@@ -1910,6 +1910,7 @@ init386(first)
 	 * Giant is used early for at least debugger traps and unexpected traps.
 	 */
 	mtx_init(&Giant, "Giant", MTX_DEF | MTX_RECURSE);
+	mtx_init(&proc0.p_mtx, "process lock", MTX_DEF);
 	mtx_lock(&Giant);
 
 	/* make ldt memory segments */
diff --git a/sys/i386/i386/machdep.c b/sys/i386/i386/machdep.c
index ea1703ce017..cbf95ccbc18 100644
--- a/sys/i386/i386/machdep.c
+++ b/sys/i386/i386/machdep.c
@@ -1910,6 +1910,7 @@ init386(first)
 	 * Giant is used early for at least debugger traps and unexpected traps.
 	 */
 	mtx_init(&Giant, "Giant", MTX_DEF | MTX_RECURSE);
+	mtx_init(&proc0.p_mtx, "process lock", MTX_DEF);
 	mtx_lock(&Giant);
 
 	/* make ldt memory segments */
diff --git a/sys/ia64/ia64/machdep.c b/sys/ia64/ia64/machdep.c
index 5ca6012275b..0b8ccae25e5 100644
--- a/sys/ia64/ia64/machdep.c
+++ b/sys/ia64/ia64/machdep.c
@@ -597,6 +597,7 @@ ia64_init()
 	 */
 	mtx_init(&Giant, "Giant", MTX_DEF | MTX_RECURSE);
 	mtx_init(&sched_lock, "sched lock", MTX_SPIN | MTX_RECURSE);
+	mtx_init(&proc0.p_mtx, "process lock", MTX_DEF);
 	mtx_lock(&Giant);
 
 	/*
diff --git a/sys/kern/init_main.c b/sys/kern/init_main.c
index 0214ed1e76f..39b6a6edb64 100644
--- a/sys/kern/init_main.c
+++ b/sys/kern/init_main.c
@@ -285,7 +285,6 @@ proc0_init(void *dummy __unused)
 	/*
 	 * Create process 0 (the swapper).
 	 */
-	mtx_init(&p->p_mtx, "process lock", MTX_DEF);
 	LIST_INSERT_HEAD(&allproc, p, p_list);
 	p->p_pgrp = &pgrp0;
 	LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
diff --git a/sys/pc98/i386/machdep.c b/sys/pc98/i386/machdep.c
index 49edba8a8ba..4d67c7b530c 100644
--- a/sys/pc98/i386/machdep.c
+++ b/sys/pc98/i386/machdep.c
@@ -2219,6 +2219,7 @@ init386(first)
 	 * Giant is used early for at least debugger traps and unexpected traps.
 	 */
 	mtx_init(&Giant, "Giant", MTX_DEF | MTX_RECURSE);
+	mtx_init(&proc0.p_mtx, "process lock", MTX_DEF);
 	mtx_lock(&Giant);
 
 	/* make ldt memory segments */
diff --git a/sys/pc98/pc98/machdep.c b/sys/pc98/pc98/machdep.c
index 49edba8a8ba..4d67c7b530c 100644
--- a/sys/pc98/pc98/machdep.c
+++ b/sys/pc98/pc98/machdep.c
@@ -2219,6 +2219,7 @@ init386(first)
 	 * Giant is used early for at least debugger traps and unexpected traps.
 	 */
 	mtx_init(&Giant, "Giant", MTX_DEF | MTX_RECURSE);
+	mtx_init(&proc0.p_mtx, "process lock", MTX_DEF);
 	mtx_lock(&Giant);
 
 	/* make ldt memory segments */