Grab the kernel lock in preparation for unlocking most of uvm_unmap_detach().

ok jca@, claudio@

diff --git a/sys/uvm/uvm_vnode.c b/sys/uvm/uvm_vnode.c
index 318aebc..079186c 100644 (file)
--- a/sys/uvm/uvm_vnode.c
+++ b/sys/uvm/uvm_vnode.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: uvm_vnode.c,v 1.132 2023/04/10 04:21:20 jsg Exp $     */
+/*     $OpenBSD: uvm_vnode.c,v 1.133 2024/07/24 12:16:21 mpi Exp $     */
 /*     $NetBSD: uvm_vnode.c,v 1.36 2000/11/24 20:34:01 chs Exp $       */
 
 /*
@@ -306,10 +306,12 @@ uvn_detach(struct uvm_object *uobj)
        struct vnode *vp;
        int oldflags;
 
+       KERNEL_LOCK();
        rw_enter(uobj->vmobjlock, RW_WRITE);
        uobj->uo_refs--;                        /* drop ref! */
        if (uobj->uo_refs) {                    /* still more refs */
                rw_exit(uobj->vmobjlock);
+               KERNEL_UNLOCK();
                return;
        }
 
@@ -365,6 +367,7 @@ uvn_detach(struct uvm_object *uobj)
 
        if ((uvn->u_flags & UVM_VNODE_RELKILL) == 0) {
                rw_exit(uobj->vmobjlock);
+               KERNEL_UNLOCK();
                return;
        }
 
@@ -387,8 +390,7 @@ out:
 
        /* drop our reference to the vnode. */
        vrele(vp);
-
-       return;
+       KERNEL_UNLOCK();
 }
 
 /*