NFSv4: Kill braindead gcc warnings

nfs4_open_revalidate: 'res' may be used uninitialized
nfs4_callback_compound: ‘hdr_res.nops’ may be used uninitialized
			'op_nr’ may be used uninitialized
encode_getattr_res: ‘savep’ may be used uninitialized

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

2 files changed, 17 insertions, 13 deletions

diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index 7c33b9a81a94..05c38cf40b69 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -330,7 +330,7 @@ static unsigned encode_op_hdr(struct xdr_stream *xdr, uint32_t op, uint32_t res)
 
 static unsigned encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res)
 {
-        uint32_t *savep;
+        uint32_t *savep = NULL;
         unsigned status = res->status;
         
         if (unlikely(status != 0))
@@ -358,23 +358,26 @@ static unsigned process_op(struct svc_rqst *rqstp,
                 struct xdr_stream *xdr_in, void *argp,
                 struct xdr_stream *xdr_out, void *resp)
 {
-        struct callback_op *op;
-        unsigned int op_nr;
+        struct callback_op *op = &callback_ops[0];
+        unsigned int op_nr = OP_CB_ILLEGAL;
         unsigned int status = 0;
         long maxlen;
         unsigned res;
 
         dprintk("%s: start\n", __FUNCTION__);
         status = decode_op_hdr(xdr_in, &op_nr);
-        if (unlikely(status != 0)) {
-                op_nr = OP_CB_ILLEGAL;
-                op = &callback_ops[0];
-        } else if (unlikely(op_nr != OP_CB_GETATTR && op_nr != OP_CB_RECALL)) {
-                op_nr = OP_CB_ILLEGAL;
-                op = &callback_ops[0];
-                status = htonl(NFS4ERR_OP_ILLEGAL);
-        } else
-                op = &callback_ops[op_nr];
+        if (likely(status == 0)) {
+                switch (op_nr) {
+                        case OP_CB_GETATTR:
+                        case OP_CB_RECALL:
+                                op = &callback_ops[op_nr];
+                                break;
+                        default:
+                                op_nr = OP_CB_ILLEGAL;
+                                op = &callback_ops[0];
+                                status = htonl(NFS4ERR_OP_ILLEGAL);
+                }
+        }
 
         maxlen = xdr_out->end - xdr_out->p;
         if (maxlen > 0 && maxlen < PAGE_SIZE) {
@@ -416,6 +419,7 @@ static int nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp
         decode_compound_hdr_arg(&xdr_in, &hdr_arg);
         hdr_res.taglen = hdr_arg.taglen;
         hdr_res.tag = hdr_arg.tag;
+        hdr_res.nops = NULL;
         encode_compound_hdr_res(&xdr_out, &hdr_res);
 
         for (;;) {
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 305bea201cd3..77a565eba562 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -908,7 +908,7 @@ out_put_state_owner:
 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
 {
         struct nfs4_exception exception = { };
-        struct nfs4_state *res;
+        struct nfs4_state *res = ERR_PTR(-EIO);
         int err;
 
         do {