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diff --git a/sys/kern/subr_devmap.c b/sys/kern/subr_devmap.c
--- a/sys/kern/subr_devmap.c
+++ b/sys/kern/subr_devmap.c
@@ -41,6 +41,8 @@
#include <machine/pte.h>
#endif
+#define DEVMAP_PADDR_NOTFOUND ((vm_paddr_t)(-1))
+
static const struct devmap_entry *devmap_table;
static boolean_t devmap_bootstrap_done = false;
@@ -198,7 +200,7 @@
* Look up the given physical address in the static mapping data and return the
* corresponding virtual address, or NULL if not found.
*/
-void *
+static void *
devmap_ptov(vm_paddr_t pa, vm_size_t size)
{
const struct devmap_entry *pd;
@@ -218,7 +220,7 @@
* Look up the given virtual address in the static mapping data and return the
* corresponding physical address, or DEVMAP_PADDR_NOTFOUND if not found.
*/
-vm_paddr_t
+static vm_paddr_t
devmap_vtop(void * vpva, vm_size_t size)
{
const struct devmap_entry *pd;
diff --git a/sys/sys/devmap.h b/sys/sys/devmap.h
--- a/sys/sys/devmap.h
+++ b/sys/sys/devmap.h
@@ -76,20 +76,6 @@
*/
void devmap_bootstrap(void);
-/*
- * Translate between virtual and physical addresses within a region that is
- * static-mapped by the devmap code. If the given address range isn't
- * static-mapped, then ptov returns NULL and vtop returns DEVMAP_PADDR_NOTFOUND.
- * The latter implies that you can't vtop just the last byte of physical address
- * space. This is not as limiting as it might sound, because even if a device
- * occupies the end of the physical address space, you're only prevented from
- * doing vtop for that single byte. If you vtop a size bigger than 1 it works.
- */
-#define DEVMAP_PADDR_NOTFOUND ((vm_paddr_t)(-1))
-
-void * devmap_ptov(vm_paddr_t _pa, vm_size_t _sz);
-vm_paddr_t devmap_vtop(void * _va, vm_size_t _sz);
-
/* Print the static mapping table; used for bootverbose output. */
void devmap_print_table(void);

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