linux-kernel - [PATCH 2/2] crc32: use __BYTE_ORDER macro for endian detection.

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Message-Id: <1271949809-24030-2-git-send-email-Joakim.Tjernlund@transmode.se>
Date:	Thu, 22 Apr 2010 17:23:29 +0200
From:	Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>
To:	"Andrew Morton" <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Cc:	Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>
Subject: [PATCH 2/2] crc32: use __BYTE_ORDER macro for endian detection.

Since crc32.c contains a nifty test program that can be
executed in user space, make sure endian detection works
reliably in user space too.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>
---
 lib/crc32.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/crc32.c b/lib/crc32.c
index 54ca885..89b0624 100644
--- a/lib/crc32.c
+++ b/lib/crc32.c
@@ -51,7 +51,7 @@ MODULE_LICENSE("GPL");
 static inline u32
 crc32_body(u32 crc, unsigned char const *buf, size_t len, const u32 (*tab)[256])
 {
-# ifdef __LITTLE_ENDIAN
+# if __BYTE_ORDER == __LITTLE_ENDIAN
 #  define DO_CRC(x) crc = tab[0][(crc ^ (x)) & 255 ] ^ (crc >> 8)
 #  define DO_CRC4 crc = tab[3][(crc) & 255 ] ^ \
 		tab[2][(crc >> 8) & 255 ] ^ \
-- 
1.6.4.4

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