cifs: No need to send SIGKILL to demux_thread during umount

There is no need to explicitly send SIGKILL to cifs_demultiplex_thread
as it is calling module_put_and_exit to exit cleanly.

socket sk_rcvtimeo is set to 7 HZ so the thread will wake up in 7 seconds and
clean itself.

Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Acked-by: Jeff Layton <jlayton@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 36ca204..8a9fded 100644 (file)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -837,7 +837,6 @@ cifs_demultiplex_thread(void *p)
        struct TCP_Server_Info *server = p;
        unsigned int pdu_length;
        char *buf = NULL;
-       struct task_struct *task_to_wake = NULL;
        struct mid_q_entry *mid_entry;
 
        current->flags |= PF_MEMALLOC;
@@ -928,19 +927,7 @@ cifs_demultiplex_thread(void *p)
        if (server->smallbuf) /* no sense logging a debug message if NULL */
                cifs_small_buf_release(server->smallbuf);
 
-       task_to_wake = xchg(&server->tsk, NULL);
        clean_demultiplex_info(server);
-
-       /* if server->tsk was NULL then wait for a signal before exiting */
-       if (!task_to_wake) {
-               set_current_state(TASK_INTERRUPTIBLE);
-               while (!signal_pending(current)) {
-                       schedule();
-                       set_current_state(TASK_INTERRUPTIBLE);
-               }
-               set_current_state(TASK_RUNNING);
-       }
-
        module_put_and_exit(0);
 }
 
@@ -2063,8 +2050,6 @@ cifs_find_tcp_session(struct smb_vol *vol)
 static void
 cifs_put_tcp_session(struct TCP_Server_Info *server)
 {
-       struct task_struct *task;
-
        spin_lock(&cifs_tcp_ses_lock);
        if (--server->srv_count > 0) {
                spin_unlock(&cifs_tcp_ses_lock);
@@ -2088,10 +2073,6 @@ cifs_put_tcp_session(struct TCP_Server_Info *server)
        kfree(server->session_key.response);
        server->session_key.response = NULL;
        server->session_key.len = 0;
-
-       task = xchg(&server->tsk, NULL);
-       if (task)
-               force_sig(SIGKILL, task);
 }
 
 static struct TCP_Server_Info *