From 9673f305038f6d71a92b1ba94aa84a3b36d0aa6d Mon Sep 17 00:00:00 2001
From: Brandon Bergren <bdragon@FreeBSD.org>
Date: Tue, 15 Sep 2020 20:47:33 +0000
Subject: [PATCH] [PowerPC64LE] Use correct in_masks table on LE to fix
 checksumming

Due to a check that should have been an endian check being an #if 0,
the wrong checksum mask table was being used on LE, which was causing
extreme strangeness in DNS resolution -- *some* hosts would be resolvable,
but most would not.

This fixes DNS resolution.

(I am committing some parts of the LE patchset ahead of time to reduce the
amount of work I have to do while committing the main patchset.)

Sponsored by:	Tag1 Consulting, Inc.
---
 sys/powerpc/powerpc/in_cksum.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/powerpc/powerpc/in_cksum.c b/sys/powerpc/powerpc/in_cksum.c
index ed0881d7520a..906dc7e8d9a3 100644
--- a/sys/powerpc/powerpc/in_cksum.c
+++ b/sys/powerpc/powerpc/in_cksum.c
@@ -42,6 +42,7 @@
 
 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
 
+#include <sys/endian.h>
 #include <sys/param.h>
 #include <sys/mbuf.h>
 #include <sys/systm.h>
@@ -73,7 +74,7 @@
     }
 
 static const u_int32_t in_masks[] = {
-#if 0
+#if _BYTE_ORDER == _LITTLE_ENDIAN
 	/*0 bytes*/ /*1 byte*/	/*2 bytes*/ /*3 bytes*/
 	0x00000000, 0x000000FF, 0x0000FFFF, 0x00FFFFFF,	/* offset 0 */
 	0x00000000, 0x0000FF00, 0x00FFFF00, 0xFFFFFF00,	/* offset 1 */