Bluetooth: Use kthread API in bnep

kernel_thread() is a low-level implementation detail and
EXPORT_SYMBOL(kernel_thread) is scheduled for removal.
Use the <linux/kthread.h> API instead.

Signed-off-by: Szymon Janc <szymon.janc@tieto.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

2 files changed, 9 insertions, 14 deletions

diff --git a/net/bluetooth/bnep/bnep.h b/net/bluetooth/bnep/bnep.h
index d768e0434ed..8e6c06158f8 100644
--- a/net/bluetooth/bnep/bnep.h
+++ b/net/bluetooth/bnep/bnep.h
@@ -155,7 +155,7 @@ struct bnep_session {
         unsigned int  role;
         unsigned long state;
         unsigned long flags;
-        atomic_t      killed;
+        struct task_struct *task;
 
         struct ethhdr eh;
         struct msghdr msg;
diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index 0a2e76bde54..ca39fcf010c 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -36,6 +36,7 @@
 #include <linux/errno.h>
 #include <linux/net.h>
 #include <linux/slab.h>
+#include <linux/kthread.h>
 #include <net/sock.h>
 
 #include <linux/socket.h>
@@ -479,12 +480,11 @@ static int bnep_session(void *arg)
 
         BT_DBG("");
 
-        daemonize("kbnepd %s", dev->name);
         set_user_nice(current, -15);
 
         init_waitqueue_entry(&wait, current);
         add_wait_queue(sk_sleep(sk), &wait);
-        while (!atomic_read(&s->killed)) {
+        while (!kthread_should_stop()) {
                 set_current_state(TASK_INTERRUPTIBLE);
 
                 /* RX */
@@ -611,11 +611,12 @@ int bnep_add_connection(struct bnep_connadd_req *req, struct socket *sock)
 
         __bnep_link_session(s);
 
-        err = kernel_thread(bnep_session, s, CLONE_KERNEL);
-        if (err < 0) {
+        s->task = kthread_run(bnep_session, s, "kbnepd %s", dev->name);
+        if (IS_ERR(s->task)) {
                 /* Session thread start failed, gotta cleanup. */
                 unregister_netdev(dev);
                 __bnep_unlink_session(s);
+                err = PTR_ERR(s->task);
                 goto failed;
         }
 
@@ -639,15 +640,9 @@ int bnep_del_connection(struct bnep_conndel_req *req)
         down_read(&bnep_session_sem);
 
         s = __bnep_get_session(req->dst);
-        if (s) {
-                /* Wakeup user-space which is polling for socket errors.
-                 * This is temporary hack until we have shutdown in L2CAP */
-                s->sock->sk->sk_err = EUNATCH;
-
-                /* Kill session thread */
-                atomic_inc(&s->killed);
-                wake_up_interruptible(sk_sleep(s->sock->sk));
-        } else
+        if (s)
+                kthread_stop(s->task);
+        else
                 err = -ENOENT;
 
         up_read(&bnep_session_sem);