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);
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