Btrfs: unaligned access fixes
Btrfs set/get macros lose type information needed to avoid
unaligned accesses on sparc64.
ere is a patch for the kernel bits which fixes most of the
unaligned accesses on sparc64.
btrfs_name_hash is modified to return the hash value instead
of getting a return location via a (potentially unaligned)
pointer.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/hash.c b/fs/btrfs/hash.c
index e5c7690..d5252f5 100644
--- a/fs/btrfs/hash.c
+++ b/fs/btrfs/hash.c
@@ -76,19 +76,18 @@
*buf++ = pad;
}
-int btrfs_name_hash(const char *name, int len, u64 *hash_result)
+u64 btrfs_name_hash(const char *name, int len)
{
__u32 hash;
__u32 minor_hash = 0;
const char *p;
__u32 in[8], buf[2];
+ u64 hash_result;
if (len == 1 && *name == '.') {
- *hash_result = 1;
- return 0;
+ return 1;
} else if (len == 2 && name[0] == '.' && name[1] == '.') {
- *hash_result = 2;
- return 0;
+ return 2;
}
/* Initialize the default seed for the hash checksum functions */
@@ -106,8 +105,8 @@
}
hash = buf[0];
minor_hash = buf[1];
- *hash_result = buf[0];
- *hash_result <<= 32;
- *hash_result |= buf[1];
- return 0;
+ hash_result = buf[0];
+ hash_result <<= 32;
+ hash_result |= buf[1];
+ return hash_result;
}