From 2f8477fb3bb1b95d2f814d76cf37777ec58c4c76 Mon Sep 17 00:00:00 2001
From: Justus Winter <4winter@informatik.uni-hamburg.de>
Date: Thu, 2 Jan 2014 15:54:17 +0100
Subject: vm: reduce the size of struct vm_page

Previously, the bit field left 31 bits unused.  By reducing the size
of wire_count by one bit, the size of the whole struct is reduced by
four bytes.

* vm/vm_page.h (struct vm_page): Reduce the size of wire_count to 15
bits.
---
 vm/vm_page.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'vm')

diff --git a/vm/vm_page.h b/vm/vm_page.h
index 339d355..4fe1b41 100644
--- a/vm/vm_page.h
+++ b/vm/vm_page.h
@@ -84,7 +84,7 @@ struct vm_page {
 	vm_object_t	object;		/* which object am I in (O,P) */
 	vm_offset_t	offset;		/* offset into that object (O,P) */
 
-	unsigned int	wire_count:16,	/* how many wired down maps use me?
+	unsigned int	wire_count:15,	/* how many wired down maps use me?
 					   (O&P) */
 	/* boolean_t */	inactive:1,	/* page is in inactive list (P) */
 			active:1,	/* page is in active list (P) */
-- 
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