From 4d723c91d21c25fccb153cd2f3b22bc905222d74 Mon Sep 17 00:00:00 2001
From: Matthew Dillon <dillon@dragonflybsd.org>
Date: Sat, 6 Oct 2007 17:22:36 +0000
Subject: [PATCH] Allow the crc32.c module to be used in userland or kernel
 code.

---
 sys/libkern/crc32.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/sys/libkern/crc32.c b/sys/libkern/crc32.c
index 9e4e10408c..f35146f1a4 100644
--- a/sys/libkern/crc32.c
+++ b/sys/libkern/crc32.c
@@ -36,14 +36,24 @@
  *      using byte-swap instructions
  *      polynomial $edb88320
  *
- * $FreeBSD: src/sys/libkern/crc32.c,v 1.1.2.1 2002/07/31 09:08:34 imp Exp $
- * $DragonFly: src/sys/libkern/crc32.c,v 1.2 2003/06/17 04:28:42 dillon Exp $
- *
  * CRC32 code derived from work by Gary S. Brown.
+ *
+ * $FreeBSD: src/sys/libkern/crc32.c,v 1.1.2.1 2002/07/31 09:08:34 imp Exp $
+ * $DragonFly: src/sys/libkern/crc32.c,v 1.3 2007/10/06 17:22:36 dillon Exp $
+ */
+
+/*
+ * WARNING: This code is used by various subsystems including the HAMMER
+ * filesystem.  This code may be directly compiled in userland or kernel
+ * builds.
  */
 
+#ifdef _KERNEL
 #include <sys/param.h>
 #include <sys/systm.h>
+#else
+#include <sys/types.h>
+#endif
 
 uint32_t crc32_tab[] = {
 	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
-- 
2.41.0