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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sun, 16 Aug 2020 20:52:25 +0000 (UTC)
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Subject: svn commit: r364285 - head/sys/vm
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Author: kib
Date: Sun Aug 16 20:52:24 2020
New Revision: 364285
URL: https://svnweb.freebsd.org/changeset/base/364285

Log:
  Atomically update vm_object vnp_size, where atomic is available.
  
  This will be used later, where it matters on 32bit arches.
  
  Reviewed by:	markj
  Tested by:	pho
  Sponsored by:	The FreeBSD Foundation
  Differential revision:	https://reviews.freebsd.org/D25968

Modified:
  head/sys/vm/vnode_pager.c

Modified: head/sys/vm/vnode_pager.c
==============================================================================
--- head/sys/vm/vnode_pager.c	Sun Aug 16 19:14:04 2020	(r364284)
+++ head/sys/vm/vnode_pager.c	Sun Aug 16 20:52:24 2020	(r364285)
@@ -520,7 +520,11 @@ vnode_pager_setsize(struct vnode *vp, vm_ooffset_t nsi
 		vm_page_xunbusy(m);
 	}
 out:
+#if defined(__powerpc__) && !defined(__powerpc64__)
 	object->un_pager.vnp.vnp_size = nsize;
+#else
+	atomic_store_64(&object->un_pager.vnp.vnp_size, nsize);
+#endif
 	object->size = nobjsize;
 	VM_OBJECT_WUNLOCK(object);
 }