1 files changed, 9 insertions, 0 deletions

diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 32d8986c26fb..b5b26d8a192c 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -450,6 +450,15 @@ fail:
 
 static inline __u32 xattr_hash(const char *msg, int len)
 {
+        /*
+         * csum_partial() gives different results for little-endian and
+         * big endian hosts. Images created on little-endian hosts and
+         * mounted on big-endian hosts(and vice versa) will see csum mismatches
+         * when trying to fetch xattrs. Treating the hash as __wsum_t would
+         * lower the frequency of mismatch.  This is an endianness bug in
+         * reiserfs.  The return statement would result in a sparse warning. Do
+         * not fix the sparse warning so as to not hide a reminder of the bug.
+         */
         return csum_partial(msg, len, 0);
 }