NFS: Create a common generic_pg_pgios()

What we have here is two functions that look identical.  Let's share
some more code!

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

4 files changed, 28 insertions, 51 deletions

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 886273a8916b..29e99aac3673 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -243,7 +243,7 @@ void nfs_pgio_data_release(struct nfs_pgio_data *);
 int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
 int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_data *,
                       const struct rpc_call_ops *, int, int);
-int nfs_do_multiple_pgios(struct list_head *, const struct rpc_call_ops *, int);
+int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *);
 
 static inline void nfs_iocounter_init(struct nfs_io_counter *c)
 {
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 2471e0278811..83d4ab46a2e9 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -493,7 +493,7 @@ out:
 }
 EXPORT_SYMBOL_GPL(nfs_initiate_pgio);
 
-int nfs_do_multiple_pgios(struct list_head *head,
+static int nfs_do_multiple_pgios(struct list_head *head,
                                  const struct rpc_call_ops *call_ops,
                                  int how)
 {
@@ -688,6 +688,30 @@ static int nfs_pgio_one(struct nfs_pageio_descriptor *desc,
         return 0;
 }
 
+int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc)
+{
+        struct nfs_rw_header *rw_hdr;
+        struct nfs_pgio_header *hdr;
+        int ret;
+
+        rw_hdr = nfs_rw_header_alloc(desc->pg_rw_ops);
+        if (!rw_hdr) {
+                desc->pg_completion_ops->error_cleanup(&desc->pg_list);
+                return -ENOMEM;
+        }
+        hdr = &rw_hdr->header;
+        nfs_pgheader_init(desc, hdr, nfs_rw_header_free);
+        atomic_inc(&hdr->refcnt);
+        ret = nfs_generic_pgio(desc, hdr);
+        if (ret == 0)
+                ret = nfs_do_multiple_pgios(&hdr->rpc_list,
+                                            desc->pg_rpc_callops,
+                                            desc->pg_ioflags);
+        if (atomic_dec_and_test(&hdr->refcnt))
+                hdr->completion_ops->completion(hdr);
+        return ret;
+}
+
 int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
                      struct nfs_pgio_header *hdr)
 {
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index b834d458a2b6..ebd1666ee13c 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -178,32 +178,9 @@ static const struct nfs_pgio_completion_ops nfs_async_read_completion_ops = {
         .completion = nfs_read_completion,
 };
 
-static int nfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc)
-{
-        struct nfs_rw_header *rhdr;
-        struct nfs_pgio_header *hdr;
-        int ret;
-
-        rhdr = nfs_rw_header_alloc(desc->pg_rw_ops);
-        if (!rhdr) {
-                desc->pg_completion_ops->error_cleanup(&desc->pg_list);
-                return -ENOMEM;
-        }
-        hdr = &rhdr->header;
-        nfs_pgheader_init(desc, hdr, nfs_rw_header_free);
-        atomic_inc(&hdr->refcnt);
-        ret = nfs_generic_pgio(desc, hdr);
-        if (ret == 0)
-                ret = nfs_do_multiple_pgios(&hdr->rpc_list,
-                                            desc->pg_rpc_callops, 0);
-        if (atomic_dec_and_test(&hdr->refcnt))
-                hdr->completion_ops->completion(hdr);
-        return ret;
-}
-
 static const struct nfs_pageio_ops nfs_pageio_read_ops = {
         .pg_test = nfs_generic_pg_test,
-        .pg_doio = nfs_generic_pg_readpages,
+        .pg_doio = nfs_generic_pg_pgios,
 };
 
 /*
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index d3fa181053ad..31a8b29e4026 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -973,33 +973,9 @@ static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops = {
         .completion = nfs_write_completion,
 };
 
-static int nfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
-{
-        struct nfs_rw_header *whdr;
-        struct nfs_pgio_header *hdr;
-        int ret;
-
-        whdr = nfs_rw_header_alloc(desc->pg_rw_ops);
-        if (!whdr) {
-                desc->pg_completion_ops->error_cleanup(&desc->pg_list);
-                return -ENOMEM;
-        }
-        hdr = &whdr->header;
-        nfs_pgheader_init(desc, hdr, nfs_rw_header_free);
-        atomic_inc(&hdr->refcnt);
-        ret = nfs_generic_pgio(desc, hdr);
-        if (ret == 0)
-                ret = nfs_do_multiple_pgios(&hdr->rpc_list,
-                                             desc->pg_rpc_callops,
-                                             desc->pg_ioflags);
-        if (atomic_dec_and_test(&hdr->refcnt))
-                hdr->completion_ops->completion(hdr);
-        return ret;
-}
-
 static const struct nfs_pageio_ops nfs_pageio_write_ops = {
         .pg_test = nfs_generic_pg_test,
-        .pg_doio = nfs_generic_pg_writepages,
+        .pg_doio = nfs_generic_pg_pgios,
 };
 
 void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,