NFS: Clean up the (commit|read|write)_setup() callback routines

Move the common code for setting up the nfs_write_data and nfs_read_data
structures into fs/nfs/read.c, fs/nfs/write.c and fs/nfs/direct.c.

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

6 files changed, 110 insertions, 140 deletions

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 5bcc764e501a..244d1bd7002c 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -272,8 +272,12 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
         unsigned long user_addr = (unsigned long)iov->iov_base;
         size_t count = iov->iov_len;
         size_t rsize = NFS_SERVER(inode)->rsize;
+        struct rpc_message msg = {
+                .rpc_cred = ctx->cred,
+        };
         struct rpc_task_setup task_setup_data = {
                 .rpc_client = NFS_CLIENT(inode),
+                .rpc_message = &msg,
                 .callback_ops = &nfs_read_direct_ops,
                 .flags = RPC_TASK_ASYNC,
         };
@@ -316,7 +320,7 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
 
                 data->req = (struct nfs_page *) dreq;
                 data->inode = inode;
-                data->cred = ctx->cred;
+                data->cred = msg.rpc_cred;
                 data->args.fh = NFS_FH(inode);
                 data->args.context = ctx;
                 data->args.offset = pos;
@@ -326,10 +330,12 @@ static ssize_t nfs_direct_read_schedule_segment(struct nfs_direct_req *dreq,
                 data->res.fattr = &data->fattr;
                 data->res.eof = 0;
                 data->res.count = bytes;
+                msg.rpc_argp = &data->args;
+                msg.rpc_resp = &data->res;
 
                 task_setup_data.callback_data = data;
+                NFS_PROTO(inode)->read_setup(data, &msg);
                 rpc_init_task(&data->task, &task_setup_data);
-                NFS_PROTO(inode)->read_setup(data);
 
                 rpc_execute(&data->task);
 
@@ -434,6 +440,9 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
         struct inode *inode = dreq->inode;
         struct list_head *p;
         struct nfs_write_data *data;
+        struct rpc_message msg = {
+                .rpc_cred = dreq->ctx->cred,
+        };
         struct rpc_task_setup task_setup_data = {
                 .rpc_client = NFS_CLIENT(inode),
                 .callback_ops = &nfs_write_direct_ops,
@@ -448,6 +457,9 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
 
                 get_dreq(dreq);
 
+                /* Use stable writes */
+                data->args.stable = NFS_FILE_SYNC;
+
                 /*
                  * Reset data->res.
                  */
@@ -460,8 +472,10 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
                  * since the original request was sent.
                  */
                 task_setup_data.callback_data = data;
+                msg.rpc_argp = &data->args;
+                msg.rpc_resp = &data->res;
+                NFS_PROTO(inode)->write_setup(data, &msg);
                 rpc_init_task(&data->task, &task_setup_data);
-                NFS_PROTO(inode)->write_setup(data, FLUSH_STABLE);
 
                 /*
                  * We're called via an RPC callback, so BKL is already held.
@@ -509,15 +523,21 @@ static const struct rpc_call_ops nfs_commit_direct_ops = {
 static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
 {
         struct nfs_write_data *data = dreq->commit_data;
+        struct rpc_message msg = {
+                .rpc_argp = &data->args,
+                .rpc_resp = &data->res,
+                .rpc_cred = dreq->ctx->cred,
+        };
         struct rpc_task_setup task_setup_data = {
                 .rpc_client = NFS_CLIENT(dreq->inode),
+                .rpc_message = &msg,
                 .callback_ops = &nfs_commit_direct_ops,
                 .callback_data = data,
                 .flags = RPC_TASK_ASYNC,
         };
 
         data->inode = dreq->inode;
-        data->cred = dreq->ctx->cred;
+        data->cred = msg.rpc_cred;
 
         data->args.fh = NFS_FH(data->inode);
         data->args.offset = 0;
@@ -526,8 +546,8 @@ static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)
         data->res.fattr = &data->fattr;
         data->res.verf = &data->verf;
 
+        NFS_PROTO(data->inode)->commit_setup(data, &msg);
         rpc_init_task(&data->task, &task_setup_data);
-        NFS_PROTO(data->inode)->commit_setup(data, 0);
 
         /* Note: task.tk_ops->rpc_release will free dreq->commit_data */
         dreq->commit_data = NULL;
@@ -649,8 +669,12 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
         struct inode *inode = ctx->path.dentry->d_inode;
         unsigned long user_addr = (unsigned long)iov->iov_base;
         size_t count = iov->iov_len;
+        struct rpc_message msg = {
+                .rpc_cred = ctx->cred,
+        };
         struct rpc_task_setup task_setup_data = {
                 .rpc_client = NFS_CLIENT(inode),
+                .rpc_message = &msg,
                 .callback_ops = &nfs_write_direct_ops,
                 .flags = RPC_TASK_ASYNC,
         };
@@ -696,20 +720,23 @@ static ssize_t nfs_direct_write_schedule_segment(struct nfs_direct_req *dreq,
 
                 data->req = (struct nfs_page *) dreq;
                 data->inode = inode;
-                data->cred = ctx->cred;
+                data->cred = msg.rpc_cred;
                 data->args.fh = NFS_FH(inode);
                 data->args.context = ctx;
                 data->args.offset = pos;
                 data->args.pgbase = pgbase;
                 data->args.pages = data->pagevec;
                 data->args.count = bytes;
+                data->args.stable = sync;
                 data->res.fattr = &data->fattr;
                 data->res.count = bytes;
                 data->res.verf = &data->verf;
 
                 task_setup_data.callback_data = data;
+                msg.rpc_argp = &data->args;
+                msg.rpc_resp = &data->res;
+                NFS_PROTO(inode)->write_setup(data, &msg);
                 rpc_init_task(&data->task, &task_setup_data);
-                NFS_PROTO(inode)->write_setup(data, sync);
 
                 rpc_execute(&data->task);
 
@@ -782,7 +809,7 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov,
         struct rpc_clnt *clnt = NFS_CLIENT(inode);
         struct nfs_direct_req *dreq;
         size_t wsize = NFS_SERVER(inode)->wsize;
-        int sync = 0;
+        int sync = NFS_UNSTABLE;
 
         dreq = nfs_direct_req_alloc();
         if (!dreq)
@@ -790,7 +817,7 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, const struct iovec *iov,
         nfs_alloc_commit_data(dreq);
 
         if (dreq->commit_data == NULL || count < wsize)
-                sync = FLUSH_STABLE;
+                sync = NFS_FILE_SYNC;
 
         dreq->inode = inode;
         dreq->ctx = get_nfs_open_context(nfs_file_open_context(iocb->ki_filp));
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 4cdc2361a669..e68580ebaa47 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -732,16 +732,9 @@ static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
         return 0;
 }
 
-static void nfs3_proc_read_setup(struct nfs_read_data *data)
+static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 {
-        struct rpc_message      msg = {
-                .rpc_proc       = &nfs3_procedures[NFS3PROC_READ],
-                .rpc_argp       = &data->args,
-                .rpc_resp       = &data->res,
-                .rpc_cred       = data->cred,
-        };
-
-        rpc_call_setup(&data->task, &msg, 0);
+        msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
 }
 
 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
@@ -753,24 +746,9 @@ static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
         return 0;
 }
 
-static void nfs3_proc_write_setup(struct nfs_write_data *data, int how)
+static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 {
-        struct rpc_message      msg = {
-                .rpc_proc       = &nfs3_procedures[NFS3PROC_WRITE],
-                .rpc_argp       = &data->args,
-                .rpc_resp       = &data->res,
-                .rpc_cred       = data->cred,
-        };
-
-        data->args.stable = NFS_UNSTABLE;
-        if (how & FLUSH_STABLE) {
-                data->args.stable = NFS_FILE_SYNC;
-                if (NFS_I(data->inode)->ncommit)
-                        data->args.stable = NFS_DATA_SYNC;
-        }
-
-        /* Finalize the task. */
-        rpc_call_setup(&data->task, &msg, 0);
+        msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
 }
 
 static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
@@ -781,16 +759,9 @@ static int nfs3_commit_done(struct rpc_task *task, struct nfs_write_data *data)
         return 0;
 }
 
-static void nfs3_proc_commit_setup(struct nfs_write_data *data, int how)
+static void nfs3_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 {
-        struct rpc_message      msg = {
-                .rpc_proc       = &nfs3_procedures[NFS3PROC_COMMIT],
-                .rpc_argp       = &data->args,
-                .rpc_resp       = &data->res,
-                .rpc_cred       = data->cred,
-        };
-
-        rpc_call_setup(&data->task, &msg, 0);
+        msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
 }
 
 static int
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ff2c5f83ce87..7c0baf23abdc 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2432,18 +2432,10 @@ static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
         return 0;
 }
 
-static void nfs4_proc_read_setup(struct nfs_read_data *data)
+static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 {
-        struct rpc_message msg = {
-                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
-                .rpc_argp = &data->args,
-                .rpc_resp = &data->res,
-                .rpc_cred = data->cred,
-        };
-
         data->timestamp   = jiffies;
-
-        rpc_call_setup(&data->task, &msg, 0);
+        msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
 }
 
 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
@@ -2461,33 +2453,15 @@ static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
         return 0;
 }
 
-static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
+static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 {
-        struct rpc_message msg = {
-                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
-                .rpc_argp = &data->args,
-                .rpc_resp = &data->res,
-                .rpc_cred = data->cred,
-        };
-        struct inode *inode = data->inode;
-        struct nfs_server *server = NFS_SERVER(inode);
-        int stable;
-        
-        if (how & FLUSH_STABLE) {
-                if (!NFS_I(inode)->ncommit)
-                        stable = NFS_FILE_SYNC;
-                else
-                        stable = NFS_DATA_SYNC;
-        } else
-                stable = NFS_UNSTABLE;
-        data->args.stable = stable;
+        struct nfs_server *server = NFS_SERVER(data->inode);
+
         data->args.bitmask = server->attr_bitmask;
         data->res.server = server;
-
         data->timestamp   = jiffies;
 
-        /* Finalize the task. */
-        rpc_call_setup(&data->task, &msg, 0);
+        msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
 }
 
 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
@@ -2502,20 +2476,13 @@ static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
         return 0;
 }
 
-static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
+static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 {
-        struct rpc_message msg = {
-                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
-                .rpc_argp = &data->args,
-                .rpc_resp = &data->res,
-                .rpc_cred = data->cred,
-        };      
         struct nfs_server *server = NFS_SERVER(data->inode);
         
         data->args.bitmask = server->attr_bitmask;
         data->res.server = server;
-
-        rpc_call_setup(&data->task, &msg, 0);
+        msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
 }
 
 /*
diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index 4f80d88e9fee..c9f46a24e75c 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -565,16 +565,9 @@ static int nfs_read_done(struct rpc_task *task, struct nfs_read_data *data)
         return 0;
 }
 
-static void nfs_proc_read_setup(struct nfs_read_data *data)
+static void nfs_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
 {
-        struct rpc_message      msg = {
-                .rpc_proc       = &nfs_procedures[NFSPROC_READ],
-                .rpc_argp       = &data->args,
-                .rpc_resp       = &data->res,
-                .rpc_cred       = data->cred,
-        };
-
-        rpc_call_setup(&data->task, &msg, 0);
+        msg->rpc_proc = &nfs_procedures[NFSPROC_READ];
 }
 
 static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
@@ -584,24 +577,15 @@ static int nfs_write_done(struct rpc_task *task, struct nfs_write_data *data)
         return 0;
 }
 
-static void nfs_proc_write_setup(struct nfs_write_data *data, int how)
+static void nfs_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
 {
-        struct rpc_message      msg = {
-                .rpc_proc       = &nfs_procedures[NFSPROC_WRITE],
-                .rpc_argp       = &data->args,
-                .rpc_resp       = &data->res,
-                .rpc_cred       = data->cred,
-        };
-
         /* Note: NFSv2 ignores @stable and always uses NFS_FILE_SYNC */
         data->args.stable = NFS_FILE_SYNC;
-
-        /* Finalize the task. */
-        rpc_call_setup(&data->task, &msg, 0);
+        msg->rpc_proc = &nfs_procedures[NFSPROC_WRITE];
 }
 
 static void
-nfs_proc_commit_setup(struct nfs_write_data *data, int how)
+nfs_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
 {
         BUG();
 }
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 8f1eb08ccffa..e9dbdc8eafe6 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -153,6 +153,16 @@ static void nfs_readpage_release(struct nfs_page *req)
         nfs_release_request(req);
 }
 
+static void nfs_execute_read(struct nfs_read_data *data)
+{
+        struct rpc_clnt *clnt = NFS_CLIENT(data->inode);
+        sigset_t oldset;
+
+        rpc_clnt_sigmask(clnt, &oldset);
+        rpc_execute(&data->task);
+        rpc_clnt_sigunmask(clnt, &oldset);
+}
+
 /*
  * Set up the NFS read request struct
  */
@@ -162,8 +172,14 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
 {
         struct inode *inode = req->wb_context->path.dentry->d_inode;
         int swap_flags = IS_SWAPFILE(inode) ? NFS_RPC_SWAPFLAGS : 0;
+        struct rpc_message msg = {
+                .rpc_argp = &data->args,
+                .rpc_resp = &data->res,
+                .rpc_cred = req->wb_context->cred,
+        };
         struct rpc_task_setup task_setup_data = {
                 .rpc_client = NFS_CLIENT(inode),
+                .rpc_message = &msg,
                 .callback_ops = call_ops,
                 .callback_data = data,
                 .flags = RPC_TASK_ASYNC | swap_flags,
@@ -171,7 +187,7 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
 
         data->req         = req;
         data->inode       = inode;
-        data->cred        = req->wb_context->cred;
+        data->cred        = msg.rpc_cred;
 
         data->args.fh     = NFS_FH(inode);
         data->args.offset = req_offset(req) + offset;
@@ -186,8 +202,8 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
         nfs_fattr_init(&data->fattr);
 
         /* Set up the initial task struct. */
+        NFS_PROTO(inode)->read_setup(data, &msg);
         rpc_init_task(&data->task, &task_setup_data);
-        NFS_PROTO(inode)->read_setup(data);
 
         dprintk("NFS: %5u initiated read call (req %s/%Ld, %u bytes @ offset %Lu)\n",
                         data->task.tk_pid,
@@ -195,6 +211,8 @@ static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
                         (long long)NFS_FILEID(inode),
                         count,
                         (unsigned long long)data->args.offset);
+
+        nfs_execute_read(data);
 }
 
 static void
@@ -211,19 +229,6 @@ nfs_async_read_error(struct list_head *head)
 }
 
 /*
- * Start an async read operation
- */
-static void nfs_execute_read(struct nfs_read_data *data)
-{
-        struct rpc_clnt *clnt = NFS_CLIENT(data->inode);
-        sigset_t oldset;
-
-        rpc_clnt_sigmask(clnt, &oldset);
-        rpc_execute(&data->task);
-        rpc_clnt_sigunmask(clnt, &oldset);
-}
-
-/*
  * Generate multiple requests to fill a single page.
  *
  * We optimize to reduce the number of read operations on the wire.  If we
@@ -277,7 +282,6 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
                                   rsize, offset);
                 offset += rsize;
                 nbytes -= rsize;
-                nfs_execute_read(data);
         } while (nbytes != 0);
 
         return 0;
@@ -315,8 +319,6 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned
         req = nfs_list_entry(data->pages.next);
 
         nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0);
-
-        nfs_execute_read(data);
         return 0;
 out_bad:
         nfs_async_read_error(head);
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 8d90e90ccd47..9a69469274ae 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -764,6 +764,16 @@ static int flush_task_priority(int how)
         return RPC_PRIORITY_NORMAL;
 }
 
+static void nfs_execute_write(struct nfs_write_data *data)
+{
+        struct rpc_clnt *clnt = NFS_CLIENT(data->inode);
+        sigset_t oldset;
+
+        rpc_clnt_sigmask(clnt, &oldset);
+        rpc_execute(&data->task);
+        rpc_clnt_sigunmask(clnt, &oldset);
+}
+
 /*
  * Set up the argument/result storage required for the RPC call.
  */
@@ -776,8 +786,14 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
         struct inode *inode = req->wb_context->path.dentry->d_inode;
         int flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
         int priority = flush_task_priority(how);
+        struct rpc_message msg = {
+                .rpc_argp = &data->args,
+                .rpc_resp = &data->res,
+                .rpc_cred = req->wb_context->cred,
+        };
         struct rpc_task_setup task_setup_data = {
                 .rpc_client = NFS_CLIENT(inode),
+                .rpc_message = &msg,
                 .callback_ops = call_ops,
                 .callback_data = data,
                 .flags = flags,
@@ -789,7 +805,7 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
 
         data->req = req;
         data->inode = inode = req->wb_context->path.dentry->d_inode;
-        data->cred = req->wb_context->cred;
+        data->cred = msg.rpc_cred;
 
         data->args.fh     = NFS_FH(inode);
         data->args.offset = req_offset(req) + offset;
@@ -797,6 +813,12 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
         data->args.pages  = data->pagevec;
         data->args.count  = count;
         data->args.context = req->wb_context;
+        data->args.stable  = NFS_UNSTABLE;
+        if (how & FLUSH_STABLE) {
+                data->args.stable = NFS_DATA_SYNC;
+                if (!NFS_I(inode)->ncommit)
+                        data->args.stable = NFS_FILE_SYNC;
+        }
 
         data->res.fattr   = &data->fattr;
         data->res.count   = count;
@@ -804,8 +826,8 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
         nfs_fattr_init(&data->fattr);
 
         /* Set up the initial task struct.  */
+        NFS_PROTO(inode)->write_setup(data, &msg);
         rpc_init_task(&data->task, &task_setup_data);
-        NFS_PROTO(inode)->write_setup(data, how);
 
         dprintk("NFS: %5u initiated write call "
                 "(req %s/%Ld, %u bytes @ offset %Lu)\n",
@@ -814,16 +836,8 @@ static void nfs_write_rpcsetup(struct nfs_page *req,
                 (long long)NFS_FILEID(inode),
                 count,
                 (unsigned long long)data->args.offset);
-}
 
-static void nfs_execute_write(struct nfs_write_data *data)
-{
-        struct rpc_clnt *clnt = NFS_CLIENT(data->inode);
-        sigset_t oldset;
-
-        rpc_clnt_sigmask(clnt, &oldset);
-        rpc_execute(&data->task);
-        rpc_clnt_sigunmask(clnt, &oldset);
+        nfs_execute_write(data);
 }
 
 /*
@@ -870,7 +884,6 @@ static int nfs_flush_multi(struct inode *inode, struct list_head *head, unsigned
                                    wsize, offset, how);
                 offset += wsize;
                 nbytes -= wsize;
-                nfs_execute_write(data);
         } while (nbytes != 0);
 
         return 0;
@@ -918,7 +931,6 @@ static int nfs_flush_one(struct inode *inode, struct list_head *head, unsigned i
         /* Set up the argument struct */
         nfs_write_rpcsetup(req, data, &nfs_write_full_ops, count, 0, how);
 
-        nfs_execute_write(data);
         return 0;
  out_bad:
         while (!list_empty(head)) {
@@ -1152,8 +1164,14 @@ static void nfs_commit_rpcsetup(struct list_head *head,
         struct inode *inode = first->wb_context->path.dentry->d_inode;
         int flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
         int priority = flush_task_priority(how);
+        struct rpc_message msg = {
+                .rpc_argp = &data->args,
+                .rpc_resp = &data->res,
+                .rpc_cred = first->wb_context->cred,
+        };
         struct rpc_task_setup task_setup_data = {
                 .rpc_client = NFS_CLIENT(inode),
+                .rpc_message = &msg,
                 .callback_ops = &nfs_commit_ops,
                 .callback_data = data,
                 .flags = flags,
@@ -1166,7 +1184,7 @@ static void nfs_commit_rpcsetup(struct list_head *head,
         list_splice_init(head, &data->pages);
 
         data->inode       = inode;
-        data->cred        = first->wb_context->cred;
+        data->cred        = msg.rpc_cred;
 
         data->args.fh     = NFS_FH(data->inode);
         /* Note: we always request a commit of the entire inode */
@@ -1178,10 +1196,12 @@ static void nfs_commit_rpcsetup(struct list_head *head,
         nfs_fattr_init(&data->fattr);
 
         /* Set up the initial task struct.  */
+        NFS_PROTO(inode)->commit_setup(data, &msg);
         rpc_init_task(&data->task, &task_setup_data);
-        NFS_PROTO(inode)->commit_setup(data, how);
 
         dprintk("NFS: %5u initiated commit call\n", data->task.tk_pid);
+
+        nfs_execute_write(data);
 }
 
 /*
@@ -1201,7 +1221,6 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how)
         /* Set up the argument struct */
         nfs_commit_rpcsetup(head, data, how);
 
-        nfs_execute_write(data);
         return 0;
  out_bad:
         while (!list_empty(head)) {