cifs: Remove some code that's no longer used, part 1

Remove some code that was #if'd out with the netfslib conversion.  This is
split into parts for file.c as the diff generator otherwise produces a hard
to read diff for part of it where a big chunk is cut out.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <sfrench@samba.org>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org

fs/smb/client/cifsglob.h

@@ -1515,18 +1515,6 @@ struct cifs_io_subrequest {
 	struct smbd_mr			*mr;
 #endif
 	struct cifs_credits		credits;
-
-#if 0 // TODO: Remove following elements
-	struct list_head		list;
-	struct completion		done;
-	struct work_struct		work;
-	struct cifsFileInfo		*cfile;
-	struct address_space		*mapping;
-	struct cifs_aio_ctx		*ctx;
-	enum writeback_sync_modes	sync_mode;
-	bool				uncached;
-	struct bio_vec			*bv;
-#endif
 };
 
 /*

fs/smb/client/cifsproto.h

@@ -601,36 +601,11 @@ void __cifs_put_smb_ses(struct cifs_ses *ses);
 extern struct cifs_ses *
 cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb3_fs_context *ctx);
 
-#if 0 // TODO Remove
-void cifs_readdata_release(struct cifs_io_subrequest *rdata);
-static inline void cifs_get_readdata(struct cifs_io_subrequest *rdata)
-{
-	refcount_inc(&rdata->subreq.ref);
-}
-static inline void cifs_put_readdata(struct cifs_io_subrequest *rdata)
-{
-	if (refcount_dec_and_test(&rdata->subreq.ref))
-		cifs_readdata_release(rdata);
-}
-#endif
 int cifs_async_readv(struct cifs_io_subrequest *rdata);
 int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid);
 
 void cifs_async_writev(struct cifs_io_subrequest *wdata);
 void cifs_writev_complete(struct work_struct *work);
-#if 0 // TODO Remove
-struct cifs_io_subrequest *cifs_writedata_alloc(work_func_t complete);
-void cifs_writedata_release(struct cifs_io_subrequest *rdata);
-static inline void cifs_get_writedata(struct cifs_io_subrequest *wdata)
-{
-	refcount_inc(&wdata->subreq.ref);
-}
-static inline void cifs_put_writedata(struct cifs_io_subrequest *wdata)
-{
-	if (refcount_dec_and_test(&wdata->subreq.ref))
-		cifs_writedata_release(wdata);
-}
-#endif
 int cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
 			  struct cifs_sb_info *cifs_sb,
 			  const unsigned char *path, char *pbuf,