NFS: Make nfs_commit_alloc() extern

We need to use nfs_commit_alloc() in fs/nfs/direct.c.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/write.c

@@ -91,7 +91,7 @@ static mempool_t *nfs_commit_mempool;
 
 static DECLARE_WAIT_QUEUE_HEAD(nfs_write_congestion);
 
-static inline struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount)
+struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount)
 {
 	struct nfs_write_data *p = mempool_alloc(nfs_commit_mempool, SLAB_NOFS);
 
@@ -112,7 +112,7 @@ static inline struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount)
 	return p;
 }
 
-static inline void nfs_commit_free(struct nfs_write_data *p)
+void nfs_commit_free(struct nfs_write_data *p)
 {
 	if (p && (p->pagevec != &p->page_array[0]))
 		kfree(p->pagevec);

include/linux/nfs_fs.h

@@ -410,6 +410,11 @@ extern int  nfs_updatepage(struct file *, struct page *, unsigned int, unsigned
 extern int nfs_writeback_done(struct rpc_task *, struct nfs_write_data *);
 extern void nfs_writedata_release(void *);
 
+#if defined(CONFIG_NFS_V3) || defined(CONFIG_NFS_V4)
+struct nfs_write_data *nfs_commit_alloc(unsigned int pagecount);
+void nfs_commit_free(struct nfs_write_data *p);
+#endif
+
 /*
  * Try to write back everything synchronously (but check the
  * return value!)