[PATCH] kanoj-mm2.0-2.2.9 unneccesary page force in by munlock

[kanoj@google.engr.sgi.com (Kanoj Sarcar)]

While looking at the code for munlock() in mm/mlock.c, I found
that munlock() unneccesarily executes a code path that forces
page fault in over the entire range. The following patch fixes 
this problem:

--- /usr/tmp/p_rdiff_a007Qs/mlock.c     Sun May 16 20:48:12 1999
+++ mm/mlock.c  Sun May 16 20:47:01 1999
@@ -117,8 +117,9 @@
                pages = (end - start) >> PAGE_SHIFT;
                if (!(newflags & VM_LOCKED))
                        pages = -pages;
+               else
+                       make_pages_present(start, end);
                vma->vm_mm->locked_vm += pages;
-               make_pages_present(start, end);
        }
        return retval;
 }

Please review and include in the source.

Thanks.

Kanoj
kanoj@engr.sgi.com
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