Extract the code to translate VM error into errno, into an exported

function vm_mmap_to_errno(). It is useful for the drivers that implement
mmap(2)-like functionality, to be able to return error codes consistent
with mmap(2).

Sponsored by:	The FreeBSD Foundation
No objections from:	alc
MFC after:	1 week

2 files changed, 8 insertions, 0 deletions

diff --git a/sys/vm/vm_extern.h b/sys/vm/vm_extern.h
index 548cdb4..72f0254 100644
--- a/sys/vm/vm_extern.h
+++ b/sys/vm/vm_extern.h
@@ -72,6 +72,7 @@ int vm_fault_wire(vm_map_t, vm_offset_t, vm_offset_t, boolean_t);
 int vm_forkproc(struct thread *, struct proc *, struct thread *, struct vmspace *, int);
 void vm_waitproc(struct proc *);
 int vm_mmap(vm_map_t, vm_offset_t *, vm_size_t, vm_prot_t, vm_prot_t, int, objtype_t, void *, vm_ooffset_t);
+int vm_mmap_to_errno(int rv);
 void vm_set_page_size(void);
 void vm_sync_icache(vm_map_t, vm_offset_t, vm_size_t);
 struct vmspace *vmspace_alloc(vm_offset_t, vm_offset_t);
diff --git a/sys/vm/vm_mmap.c b/sys/vm/vm_mmap.c
index 0d1a8d7..c78571d 100644
--- a/sys/vm/vm_mmap.c
+++ b/sys/vm/vm_mmap.c
@@ -1535,6 +1535,13 @@ vm_mmap(vm_map_t map, vm_offset_t *addr, vm_size_t size, vm_prot_t prot,
 		vm_map_wire(map, *addr, *addr + size,
 		    VM_MAP_WIRE_USER|VM_MAP_WIRE_NOHOLES);
 
+	return (vm_mmap_to_errno(rv));
+}
+
+int
+vm_mmap_to_errno(int rv)
+{
+
 	switch (rv) {
 	case KERN_SUCCESS:
 		return (0);