linux-kernel - CRC32C big endian bugs...

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Date:	Tue, 12 Feb 2008 01:23:36 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	chris.mason@...cle.com
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	btrfs-devel@....oracle.com
Subject: CRC32C big endian bugs...


The CRC32C implementation in the btrfs progs is different from the one
in the kernel, so obviously nothing can possibly work on big-endian.

This is getting less and less fun by the minute, I simply wanted to
test btrfs on Niagara :-/

Here is a patch to fix that:

--- vanilla/btrfs-progs-0.12/crc32c.c	2008-02-06 08:37:45.000000000 -0800
+++ btrfs-progs-0.12/crc32c.c	2008-02-12 01:19:33.000000000 -0800
@@ -91,13 +91,11 @@ static const u32 crc32c_table[256] = {
  * crc using table.
  */
 
-u32 crc32c_le(u32 seed, unsigned char const *data, size_t length)
+u32 crc32c_le(u32 crc, unsigned char const *data, size_t length)
 {
-	u32 crc = (__force __u32)(cpu_to_le32(seed));
-	
 	while (length--)
 		crc =
 		    crc32c_table[(crc ^ *data++) & 0xFFL] ^ (crc >> 8);
 
-	return le32_to_cpu((__force __le32)crc);
+	return crc;
 }
--
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