[XFS] endianess annotations and tidying for the uuid code

SGI-PV: 943272
SGI-Modid: xfs-linux-melb:xfs-kern:203709a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

diff --git a/fs/xfs/support/uuid.c b/fs/xfs/support/uuid.c
index 69ec4f540c3ac737f0759848ba8bf3fd372e1ea7..a3d565a67734e0df236b42fd933d24f1a90393e9 100644 (file)
--- a/fs/xfs/support/uuid.c
+++ b/fs/xfs/support/uuid.c
@@ -27,6 +27,16 @@ uuid_init(void)
        mutex_init(&uuid_monitor);
 }
 
+
+/* IRIX interpretation of an uuid_t */
+typedef struct {
+       __be32  uu_timelow;
+       __be16  uu_timemid;
+       __be16  uu_timehi;
+       __be16  uu_clockseq;
+       __be16  uu_node[3];
+} xfs_uu_t;
+
 /*
  * uuid_getnodeuniq - obtain the node unique fields of a UUID.
  *
@@ -36,16 +46,11 @@ uuid_init(void)
 void
 uuid_getnodeuniq(uuid_t *uuid, int fsid [2])
 {
-       char    *uu = (char *)uuid;
-
-       /* on IRIX, this function assumes big-endian fields within
-        * the uuid, so we use INT_GET to get the same result on
-        * little-endian systems
-        */
+       xfs_uu_t *uup = (xfs_uu_t *)uuid;
 
-       fsid[0] = (INT_GET(*(u_int16_t*)(uu+8), ARCH_CONVERT) << 16) +
-                  INT_GET(*(u_int16_t*)(uu+4), ARCH_CONVERT);
-       fsid[1] =  INT_GET(*(u_int32_t*)(uu  ), ARCH_CONVERT);
+       fsid[0] = (be16_to_cpu(uup->uu_clockseq) << 16) |
+                  be16_to_cpu(uup->uu_timemid);
+       fsid[1] = be16_to_cpu(uup->uu_timelow);
 }
 
 void