[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>

1 files changed, 14 insertions, 9 deletions

diff --git a/fs/xfs/support/uuid.c b/fs/xfs/support/uuid.c
index 69ec4f540c3a..a3d565a67734 100644
--- 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