NFS: Fix a typo in include/linux/nfs_fs.h

nfs_commit_inode() needs to be defined irrespectively of whether or not
we are supporting NFSv3 and NFSv4.

Allow the compiler to optimise away code in the NFSv2-only case by
converting it into an inlined stub function.

Reported-and-tested-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/nfs/write.c

diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index bb72ad3..9f81bdd 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1454,11 +1454,6 @@
 	return ret;
 }
 #else
-int nfs_commit_inode(struct inode *inode, int how)
-{
-	return 0;
-}
-
 static int nfs_commit_unstable_pages(struct inode *inode, struct writeback_control *wbc)
 {
 	return 0;

include/linux/nfs_fs.h

diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index f6e2455..bad4d12 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -496,6 +496,12 @@
 extern int  nfs_commit_inode(struct inode *, int);
 extern struct nfs_write_data *nfs_commitdata_alloc(void);
 extern void nfs_commit_free(struct nfs_write_data *wdata);
+#else
+static inline int
+nfs_commit_inode(struct inode *inode, int how)
+{
+	return 0;
+}
 #endif
 
 static inline int