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From: Jeff Roberson <jeff@FreeBSD.org>
Date: Fri, 28 Feb 2020 20:32:35 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r358445 - head/sys/vm
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Author: jeff
Date: Fri Feb 28 20:32:35 2020
New Revision: 358445
URL: https://svnweb.freebsd.org/changeset/base/358445

Log:
  Support the NOCREAT flag for grab_valid_unlocked.
  
  Reviewed by:	markj
  Differential Revision:	https://reviews.freebsd.org/D23865

Modified:
  head/sys/vm/vm_page.c

Modified: head/sys/vm/vm_page.c
==============================================================================
--- head/sys/vm/vm_page.c	Fri Feb 28 20:30:53 2020	(r358444)
+++ head/sys/vm/vm_page.c	Fri Feb 28 20:32:35 2020	(r358445)
@@ -4639,6 +4639,10 @@ vm_page_grab_valid_unlocked(vm_page_t *mp, vm_object_t
 		}
 		vm_page_busy_release(m);
 	}
+	if ((allocflags & VM_ALLOC_NOCREAT) != 0) {
+		*mp = NULL;
+		return (VM_PAGER_FAIL);
+	}
 	VM_OBJECT_WLOCK(object);
 	error = vm_page_grab_valid(mp, object, pindex, allocflags);
 	VM_OBJECT_WUNLOCK(object);