mtx: Sprinkle const qualifiers where appropriate

No functional change intended.

MFC after:	2 weeks

2 files changed, 3 insertions, 3 deletions

diff --git a/sys/kern/kern_mutex.c b/sys/kern/kern_mutex.c
index f952b3fc8805..8b5908f5219a 100644
--- a/sys/kern/kern_mutex.c
+++ b/sys/kern/kern_mutex.c
@@ -1136,9 +1136,9 @@ __mtx_assert(const volatile uintptr_t *c, int what, const char *file, int line)
  * General init routine used by the MTX_SYSINIT() macro.
  */
 void
-mtx_sysinit(void *arg)
+mtx_sysinit(const void *arg)
 {
-	struct mtx_args *margs = arg;
+	const struct mtx_args *margs = arg;
 
 	mtx_init((struct mtx *)margs->ma_mtx, margs->ma_desc, NULL,
 	    margs->ma_opts);
diff --git a/sys/sys/mutex.h b/sys/sys/mutex.h
index 56c03a1b0be9..08d4e2d28b33 100644
--- a/sys/sys/mutex.h
+++ b/sys/sys/mutex.h
@@ -91,7 +91,7 @@
 void	_mtx_init(volatile uintptr_t *c, const char *name, const char *type,
 	    int opts);
 void	_mtx_destroy(volatile uintptr_t *c);
-void	mtx_sysinit(void *arg);
+void	mtx_sysinit(const void *arg);
 int	_mtx_trylock_flags_int(struct mtx *m, int opts LOCK_FILE_LINE_ARG_DEF);
 int	_mtx_trylock_flags_(volatile uintptr_t *c, int opts, const char *file,
 	    int line);