cifs: Remove unused functions

cifs_ses_find_chan() has been unused since commit
f486ef8e ("cifs: use the chans_need_reconnect bitmap for reconnect status")

cifs_read_page_from_socket() has been unused since commit
d08089f6 ("cifs: Change the I/O paths to use an iterator rather than a page list")

cifs_chan_in_reconnect() has been unused since commit
bc962159 ("cifs: avoid race conditions with parallel reconnects")

Remove them.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/smb/client/cifsproto.h

@@ -252,10 +252,6 @@ extern int cifs_read_from_socket(struct TCP_Server_Info *server, char *buf,
 			         unsigned int to_read);
 extern ssize_t cifs_discard_from_socket(struct TCP_Server_Info *server,
 					size_t to_read);
-extern int cifs_read_page_from_socket(struct TCP_Server_Info *server,
-					struct page *page,
-					unsigned int page_offset,
-					unsigned int to_read);
 int cifs_read_iter_from_socket(struct TCP_Server_Info *server,
 			       struct iov_iter *iter,
 			       unsigned int to_read);
@@ -623,8 +619,6 @@ enum securityEnum cifs_select_sectype(struct TCP_Server_Info *,
 int cifs_alloc_hash(const char *name, struct shash_desc **sdesc);
 void cifs_free_hash(struct shash_desc **sdesc);
 
-struct cifs_chan *
-cifs_ses_find_chan(struct cifs_ses *ses, struct TCP_Server_Info *server);
 int cifs_try_adding_channels(struct cifs_ses *ses);
 bool is_server_using_iface(struct TCP_Server_Info *server,
 			   struct cifs_server_iface *iface);
@@ -640,9 +634,6 @@ cifs_chan_set_in_reconnect(struct cifs_ses *ses,
 void
 cifs_chan_clear_in_reconnect(struct cifs_ses *ses,
 			       struct TCP_Server_Info *server);
-bool
-cifs_chan_in_reconnect(struct cifs_ses *ses,
-			  struct TCP_Server_Info *server);
 void
 cifs_chan_set_need_reconnect(struct cifs_ses *ses,
 			     struct TCP_Server_Info *server);

fs/smb/client/connect.c

@@ -794,18 +794,6 @@ cifs_discard_from_socket(struct TCP_Server_Info *server, size_t to_read)
 	return cifs_readv_from_socket(server, &smb_msg);
 }
 
-int
-cifs_read_page_from_socket(struct TCP_Server_Info *server, struct page *page,
-	unsigned int page_offset, unsigned int to_read)
-{
-	struct msghdr smb_msg = {};
-	struct bio_vec bv;
-
-	bvec_set_page(&bv, page, to_read, page_offset);
-	iov_iter_bvec(&smb_msg.msg_iter, ITER_DEST, &bv, 1, to_read);
-	return cifs_readv_from_socket(server, &smb_msg);
-}
-
 int
 cifs_read_iter_from_socket(struct TCP_Server_Info *server, struct iov_iter *iter,
 			   unsigned int to_read)

fs/smb/client/sess.c

@@ -115,18 +115,6 @@ cifs_chan_clear_in_reconnect(struct cifs_ses *ses,
 	ses->chans[chan_index].in_reconnect = false;
 }
 
-bool
-cifs_chan_in_reconnect(struct cifs_ses *ses,
-			  struct TCP_Server_Info *server)
-{
-	unsigned int chan_index = cifs_ses_get_chan_index(ses, server);
-
-	if (chan_index == CIFS_INVAL_CHAN_INDEX)
-		return true;	/* err on the safer side */
-
-	return CIFS_CHAN_IN_RECONNECT(ses, chan_index);
-}
-
 void
 cifs_chan_set_need_reconnect(struct cifs_ses *ses,
 			     struct TCP_Server_Info *server)
@@ -487,26 +475,6 @@ cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server)
 	spin_unlock(&ses->chan_lock);
 }
 
-/*
- * If server is a channel of ses, return the corresponding enclosing
- * cifs_chan otherwise return NULL.
- */
-struct cifs_chan *
-cifs_ses_find_chan(struct cifs_ses *ses, struct TCP_Server_Info *server)
-{
-	int i;
-
-	spin_lock(&ses->chan_lock);
-	for (i = 0; i < ses->chan_count; i++) {
-		if (ses->chans[i].server == server) {
-			spin_unlock(&ses->chan_lock);
-			return &ses->chans[i];
-		}
-	}
-	spin_unlock(&ses->chan_lock);
-	return NULL;
-}
-
 static int
 cifs_ses_add_channel(struct cifs_ses *ses,
 		     struct cifs_server_iface *iface)