git: 4d903a1a74d9 - main - tmpfs_getattr(): Only take vm_object lock on 32bit machines

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=4d903a1a74d9526aba4d177e89c10f97df5662f2

commit 4d903a1a74d9526aba4d177e89c10f97df5662f2
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2022-12-17 11:03:32 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2022-12-17 17:01:56 +0000

    tmpfs_getattr(): Only take vm_object lock on 32bit machines
    
    Torn reads are only possible for 32bit arches.
    
    Requested by:   mjg
    Reviewed by:    mjg, markj
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D37725
---
 sys/fs/tmpfs/tmpfs_vnops.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sys/fs/tmpfs/tmpfs_vnops.c b/sys/fs/tmpfs/tmpfs_vnops.c
index 4d95441c05e4..1e3a4ac68f3f 100644
--- a/sys/fs/tmpfs/tmpfs_vnops.c
+++ b/sys/fs/tmpfs/tmpfs_vnops.c
@@ -491,7 +491,6 @@ tmpfs_getattr(struct vop_getattr_args *v)
 {
 	struct vnode *vp = v->a_vp;
 	struct vattr *vap = v->a_vap;
-	vm_object_t obj;
 	struct tmpfs_node *node;
 
 	node = VP_TO_TMPFS_NODE(vp);
@@ -516,10 +515,15 @@ tmpfs_getattr(struct vop_getattr_args *v)
 	vap->va_rdev = (vp->v_type == VBLK || vp->v_type == VCHR) ?
 	    node->tn_rdev : NODEV;
 	if (vp->v_type == VREG) {
-		obj = node->tn_reg.tn_aobj;
+#ifdef __ILP32__
+		vm_object_t obj = node->tn_reg.tn_aobj;
+
 		VM_OBJECT_RLOCK(obj);
+#endif
 		vap->va_bytes = ptoa(node->tn_reg.tn_pages);
+#ifdef __ILP32__
 		VM_OBJECT_RUNLOCK(obj);
+#endif
 	} else {
 		vap->va_bytes = node->tn_size;
 	}