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From: Nathan Whitehorn <nwhitehorn@FreeBSD.org>
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Subject: svn commit: r333803 - head/usr.sbin/bsdinstall/partedit
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Author: nwhitehorn
Date: Fri May 18 17:43:15 2018
New Revision: 333803
URL: https://svnweb.freebsd.org/changeset/base/333803

Log:
  Fix math error in the computation of the free space after the last partition
  on a disk. This resulted in one sector always remaining free at the end.
  
  PR:		bin/228322
  Submitted by:	Rikiya Yonemoto
  MFC after:	2 weeks

Modified:
  head/usr.sbin/bsdinstall/partedit/gpart_ops.c

Modified: head/usr.sbin/bsdinstall/partedit/gpart_ops.c
==============================================================================
--- head/usr.sbin/bsdinstall/partedit/gpart_ops.c	Fri May 18 17:29:43 2018	(r333802)
+++ head/usr.sbin/bsdinstall/partedit/gpart_ops.c	Fri May 18 17:43:15 2018	(r333803)
@@ -856,7 +856,7 @@ gpart_max_free(struct ggeom *geom, intmax_t *npartstar
 	}
 
 	if (end - lastend > maxsize) {
-		maxsize = end - lastend - 1;
+		maxsize = end - lastend;
 		maxstart = lastend + 1;
 	}