18 files changed, 200 insertions, 68 deletions

diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c
index 1567ac296b39..1ffc2ebdf612 100644
--- a/drivers/staging/android/binder.c
+++ b/drivers/staging/android/binder.c
@@ -20,6 +20,7 @@
 #include <asm/cacheflush.h>
 #include <linux/fdtable.h>
 #include <linux/file.h>
+#include <linux/freezer.h>
 #include <linux/fs.h>
 #include <linux/list.h>
 #include <linux/miscdevice.h>
@@ -2140,13 +2141,13 @@ retry:
                         if (!binder_has_proc_work(proc, thread))
                                 ret = -EAGAIN;
                 } else
-                        ret = wait_event_interruptible_exclusive(proc->wait, binder_has_proc_work(proc, thread));
+                        ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread));
         } else {
                 if (non_block) {
                         if (!binder_has_thread_work(thread))
                                 ret = -EAGAIN;
                 } else
-                        ret = wait_event_interruptible(thread->wait, binder_has_thread_work(thread));
+                        ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread));
         }
 
         binder_lock(__func__);
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index bfbf4700d160..b70aa7c91394 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -447,7 +447,7 @@ wait_for_response(struct TCP_Server_Info *server, struct mid_q_entry *midQ)
 {
         int error;
 
-        error = wait_event_freezekillable(server->response_q,
+        error = wait_event_freezekillable_unsafe(server->response_q,
                                     midQ->mid_state != MID_REQUEST_SUBMITTED);
         if (error < 0)
                 return -ERESTARTSYS;
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index deecc7294a67..0cff4434880d 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -34,6 +34,7 @@
 #include <linux/mutex.h>
 #include <linux/anon_inodes.h>
 #include <linux/device.h>
+#include <linux/freezer.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/mman.h>
@@ -1602,7 +1603,8 @@ fetch_events:
                         }
 
                         spin_unlock_irqrestore(&ep->lock, flags);
-                        if (!schedule_hrtimeout_range(to, slack, HRTIMER_MODE_ABS))
+                        if (!freezable_schedule_hrtimeout_range(to, slack,
+                                                                HRTIMER_MODE_ABS))
                                 timed_out = 1;
 
                         spin_lock_irqsave(&ep->lock, flags);
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index c1c7a9d78722..ce727047ee87 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -79,7 +79,7 @@ int nfs_wait_bit_killable(void *word)
 {
         if (fatal_signal_pending(current))
                 return -ERESTARTSYS;
-        freezable_schedule();
+        freezable_schedule_unsafe();
         return 0;
 }
 EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index 43ea96ced28c..ce90eb4775c2 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -33,7 +33,7 @@ nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
                 res = rpc_call_sync(clnt, msg, flags);
                 if (res != -EJUKEBOX)
                         break;
-                freezable_schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
+                freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
                 res = -ERESTARTSYS;
         } while (!fatal_signal_pending(current));
         return res;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index d7ba5616989c..28241a42f363 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -268,7 +268,7 @@ static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
                 *timeout = NFS4_POLL_RETRY_MIN;
         if (*timeout > NFS4_POLL_RETRY_MAX)
                 *timeout = NFS4_POLL_RETRY_MAX;
-        freezable_schedule_timeout_killable(*timeout);
+        freezable_schedule_timeout_killable_unsafe(*timeout);
         if (fatal_signal_pending(current))
                 res = -ERESTARTSYS;
         *timeout <<= 1;
@@ -4528,7 +4528,7 @@ int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4
 static unsigned long
 nfs4_set_lock_task_retry(unsigned long timeout)
 {
-        freezable_schedule_timeout_killable(timeout);
+        freezable_schedule_timeout_killable_unsafe(timeout);
         timeout <<= 1;
         if (timeout > NFS4_LOCK_MAXTIMEOUT)
                 return NFS4_LOCK_MAXTIMEOUT;
diff --git a/fs/select.c b/fs/select.c
index 8c1c96c27062..6b14dc7df3a4 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -27,6 +27,7 @@
 #include <linux/rcupdate.h>
 #include <linux/hrtimer.h>
 #include <linux/sched/rt.h>
+#include <linux/freezer.h>
 
 #include <asm/uaccess.h>
 
@@ -236,7 +237,8 @@ int poll_schedule_timeout(struct poll_wqueues *pwq, int state,
 
         set_current_state(state);
         if (!pwq->triggered)
-                rc = schedule_hrtimeout_range(expires, slack, HRTIMER_MODE_ABS);
+                rc = freezable_schedule_hrtimeout_range(expires, slack,
+                                                        HRTIMER_MODE_ABS);
         __set_current_state(TASK_RUNNING);
 
         /*
diff --git a/include/linux/debug_locks.h b/include/linux/debug_locks.h
index 21ca773f77bf..822c1354f3a6 100644
--- a/include/linux/debug_locks.h
+++ b/include/linux/debug_locks.h
@@ -51,7 +51,7 @@ struct task_struct;
 extern void debug_show_all_locks(void);
 extern void debug_show_held_locks(struct task_struct *task);
 extern void debug_check_no_locks_freed(const void *from, unsigned long len);
-extern void debug_check_no_locks_held(struct task_struct *task);
+extern void debug_check_no_locks_held(void);
 #else
 static inline void debug_show_all_locks(void)
 {
@@ -67,7 +67,7 @@ debug_check_no_locks_freed(const void *from, unsigned long len)
 }
 
 static inline void
-debug_check_no_locks_held(struct task_struct *task)
+debug_check_no_locks_held(void)
 {
 }
 #endif
diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index e70df40d84f6..7fd81b8c4897 100644
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -3,6 +3,7 @@
 #ifndef FREEZER_H_INCLUDED
 #define FREEZER_H_INCLUDED
 
+#include <linux/debug_locks.h>
 #include <linux/sched.h>
 #include <linux/wait.h>
 #include <linux/atomic.h>
@@ -46,7 +47,11 @@ extern int freeze_kernel_threads(void);
 extern void thaw_processes(void);
 extern void thaw_kernel_threads(void);
 
-static inline bool try_to_freeze(void)
+/*
+ * DO NOT ADD ANY NEW CALLERS OF THIS FUNCTION
+ * If try_to_freeze causes a lockdep warning it means the caller may deadlock
+ */
+static inline bool try_to_freeze_unsafe(void)
 {
         might_sleep();
         if (likely(!freezing(current)))
@@ -54,6 +59,13 @@ static inline bool try_to_freeze(void)
         return __refrigerator(false);
 }
 
+static inline bool try_to_freeze(void)
+{
+        if (!(current->flags & PF_NOFREEZE))
+                debug_check_no_locks_held();
+        return try_to_freeze_unsafe();
+}
+
 extern bool freeze_task(struct task_struct *p);
 extern bool set_freezable(void);
 
@@ -115,6 +127,14 @@ static inline void freezer_count(void)
         try_to_freeze();
 }
 
+/* DO NOT ADD ANY NEW CALLERS OF THIS FUNCTION */
+static inline void freezer_count_unsafe(void)
+{
+        current->flags &= ~PF_FREEZER_SKIP;
+        smp_mb();
+        try_to_freeze_unsafe();
+}
+
 /**
  * freezer_should_skip - whether to skip a task when determining frozen
  *                       state is reached
@@ -139,28 +159,86 @@ static inline bool freezer_should_skip(struct task_struct *p)
 }
 
 /*
- * These macros are intended to be used whenever you want allow a sleeping
+ * These functions are intended to be used whenever you want allow a sleeping
  * task to be frozen. Note that neither return any clear indication of
  * whether a freeze event happened while in this function.
  */
 
 /* Like schedule(), but should not block the freezer. */
-#define freezable_schedule()                                            \
-({                                                                      \
-        freezer_do_not_count();                                         \
-        schedule();                                                     \
-        freezer_count();                                                \
-})
+static inline void freezable_schedule(void)
+{
+        freezer_do_not_count();
+        schedule();
+        freezer_count();
+}
+
+/* DO NOT ADD ANY NEW CALLERS OF THIS FUNCTION */
+static inline void freezable_schedule_unsafe(void)
+{
+        freezer_do_not_count();
+        schedule();
+        freezer_count_unsafe();
+}
+
+/*
+ * Like freezable_schedule_timeout(), but should not block the freezer.  Do not
+ * call this with locks held.
+ */
+static inline long freezable_schedule_timeout(long timeout)
+{
+        long __retval;
+        freezer_do_not_count();
+        __retval = schedule_timeout(timeout);
+        freezer_count();
+        return __retval;
+}
+
+/*
+ * Like schedule_timeout_interruptible(), but should not block the freezer.  Do not
+ * call this with locks held.
+ */
+static inline long freezable_schedule_timeout_interruptible(long timeout)
+{
+        long __retval;
+        freezer_do_not_count();
+        __retval = schedule_timeout_interruptible(timeout);
+        freezer_count();
+        return __retval;
+}
 
 /* Like schedule_timeout_killable(), but should not block the freezer. */
-#define freezable_schedule_timeout_killable(timeout)                    \
-({                                                                      \
-        long __retval;                                                  \
-        freezer_do_not_count();                                         \
-        __retval = schedule_timeout_killable(timeout);                  \
-        freezer_count();                                                \
-        __retval;                                                       \
-})
+static inline long freezable_schedule_timeout_killable(long timeout)
+{
+        long __retval;
+        freezer_do_not_count();
+        __retval = schedule_timeout_killable(timeout);
+        freezer_count();
+        return __retval;
+}
+
+/* DO NOT ADD ANY NEW CALLERS OF THIS FUNCTION */
+static inline long freezable_schedule_timeout_killable_unsafe(long timeout)
+{
+        long __retval;
+        freezer_do_not_count();
+        __retval = schedule_timeout_killable(timeout);
+        freezer_count_unsafe();
+        return __retval;
+}
+
+/*
+ * Like schedule_hrtimeout_range(), but should not block the freezer.  Do not
+ * call this with locks held.
+ */
+static inline int freezable_schedule_hrtimeout_range(ktime_t *expires,
+                unsigned long delta, const enum hrtimer_mode mode)
+{
+        int __retval;
+        freezer_do_not_count();
+        __retval = schedule_hrtimeout_range(expires, delta, mode);
+        freezer_count();
+        return __retval;
+}
 
 /*
  * Freezer-friendly wrappers around wait_event_interruptible(),
@@ -177,33 +255,45 @@ static inline bool freezer_should_skip(struct task_struct *p)
         __retval;                                                       \
 })
 
+/* DO NOT ADD ANY NEW CALLERS OF THIS FUNCTION */
+#define wait_event_freezekillable_unsafe(wq, condition)                 \
+({                                                                      \
+        int __retval;                                                   \
+        freezer_do_not_count();                                         \
+        __retval = wait_event_killable(wq, (condition));                \
+        freezer_count_unsafe();                                         \
+        __retval;                                                       \
+})
+
 #define wait_event_freezable(wq, condition)                             \
 ({                                                                      \
         int __retval;                                                   \
-        for (;;) {                                                      \
-                __retval = wait_event_interruptible(wq,                 \
-                                (condition) || freezing(current));      \
-                if (__retval || (condition))                            \
-                        break;                                          \
-                try_to_freeze();                                        \
-        }                                                               \
+        freezer_do_not_count();                                         \
+        __retval = wait_event_interruptible(wq, (condition));           \
+        freezer_count();                                                \
         __retval;                                                       \
 })
 
 #define wait_event_freezable_timeout(wq, condition, timeout)            \
 ({                                                                      \
         long __retval = timeout;                                        \
-        for (;;) {                                                      \
-                __retval = wait_event_interruptible_timeout(wq,         \
-                                (condition) || freezing(current),       \
-                                __retval);                              \
-                if (__retval <= 0 || (condition))                       \
-                        break;                                          \
-                try_to_freeze();                                        \
-        }                                                               \
+        freezer_do_not_count();                                         \
+        __retval = wait_event_interruptible_timeout(wq, (condition),    \
+                                __retval);                              \
+        freezer_count();                                                \
         __retval;                                                       \
 })
 
+#define wait_event_freezable_exclusive(wq, condition)                   \
+({                                                                      \
+        int __retval;                                                   \
+        freezer_do_not_count();                                         \
+        __retval = wait_event_interruptible_exclusive(wq, condition);   \
+        freezer_count();                                                \
+        __retval;                                                       \
+})
+
+
 #else /* !CONFIG_FREEZER */
 static inline bool frozen(struct task_struct *p) { return false; }
 static inline bool freezing(struct task_struct *p) { return false; }
@@ -225,18 +315,37 @@ static inline void set_freezable(void) {}
 
 #define freezable_schedule()  schedule()
 
+#define freezable_schedule_unsafe()  schedule()
+
+#define freezable_schedule_timeout(timeout)  schedule_timeout(timeout)
+
+#define freezable_schedule_timeout_interruptible(timeout)               \
+        schedule_timeout_interruptible(timeout)
+
 #define freezable_schedule_timeout_killable(timeout)                    \
         schedule_timeout_killable(timeout)
 
+#define freezable_schedule_timeout_killable_unsafe(timeout)             \
+        schedule_timeout_killable(timeout)
+
+#define freezable_schedule_hrtimeout_range(expires, delta, mode)        \
+        schedule_hrtimeout_range(expires, delta, mode)
+
 #define wait_event_freezable(wq, condition)                             \
                 wait_event_interruptible(wq, condition)
 
 #define wait_event_freezable_timeout(wq, condition, timeout)            \
                 wait_event_interruptible_timeout(wq, condition, timeout)
 
+#define wait_event_freezable_exclusive(wq, condition)                   \
+                wait_event_interruptible_exclusive(wq, condition)
+
 #define wait_event_freezekillable(wq, condition)                \
                 wait_event_killable(wq, condition)
 
+#define wait_event_freezekillable_unsafe(wq, condition)                 \
+                wait_event_killable(wq, condition)
+
 #endif /* !CONFIG_FREEZER */
 
 #endif  /* FREEZER_H_INCLUDED */
diff --git a/kernel/exit.c b/kernel/exit.c
index 7bb73f9d09db..6a057750ebbb 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -835,7 +835,7 @@ void do_exit(long code)
         /*
          * Make sure we are holding no locks:
          */
-        debug_check_no_locks_held(tsk);
+        debug_check_no_locks_held();
         /*
          * We can do this unlocked here. The futex code uses this flag
          * just to verify whether the pi state cleanup has been done
diff --git a/kernel/freezer.c b/kernel/freezer.c
index c38893b0efba..8b2afc1c9df0 100644
--- a/kernel/freezer.c
+++ b/kernel/freezer.c
@@ -110,6 +110,18 @@ bool freeze_task(struct task_struct *p)
 {
         unsigned long flags;
 
+        /*
+         * This check can race with freezer_do_not_count, but worst case that
+         * will result in an extra wakeup being sent to the task.  It does not
+         * race with freezer_count(), the barriers in freezer_count() and
+         * freezer_should_skip() ensure that either freezer_count() sees
+         * freezing == true in try_to_freeze() and freezes, or
+         * freezer_should_skip() sees !PF_FREEZE_SKIP and freezes the task
+         * normally.
+         */
+        if (freezer_should_skip(p))
+                return false;
+
         spin_lock_irqsave(&freezer_lock, flags);
         if (!freezing(p) || frozen(p)) {
                 spin_unlock_irqrestore(&freezer_lock, flags);
diff --git a/kernel/futex.c b/kernel/futex.c
index b26dcfc02c94..d710fae8abbe 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -61,6 +61,7 @@
 #include <linux/nsproxy.h>
 #include <linux/ptrace.h>
 #include <linux/sched/rt.h>
+#include <linux/freezer.h>
 
 #include <asm/futex.h>
 
@@ -1807,7 +1808,7 @@ static void futex_wait_queue_me(struct futex_hash_bucket *hb, struct futex_q *q,
                  * is no timeout, or if it has yet to expire.
                  */
                 if (!timeout || timeout->task)
-                        schedule();
+                        freezable_schedule();
         }
         __set_current_state(TASK_RUNNING);
 }
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index fd4b13b131f8..3ee4d06c6fc2 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -47,6 +47,7 @@
 #include <linux/sched/sysctl.h>
 #include <linux/sched/rt.h>
 #include <linux/timer.h>
+#include <linux/freezer.h>
 
 #include <asm/uaccess.h>
 
@@ -1545,7 +1546,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod
                         t->task = NULL;
 
                 if (likely(t->task))
-                        schedule();
+                        freezable_schedule();
 
                 hrtimer_cancel(&t->timer);
                 mode = HRTIMER_MODE_ABS;
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 1f3186b37fd5..e16c45b9ee77 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -4090,7 +4090,7 @@ void debug_check_no_locks_freed(const void *mem_from, unsigned long mem_len)
 }
 EXPORT_SYMBOL_GPL(debug_check_no_locks_freed);
 
-static void print_held_locks_bug(struct task_struct *curr)
+static void print_held_locks_bug(void)
 {
         if (!debug_locks_off())
                 return;
@@ -4099,22 +4099,21 @@ static void print_held_locks_bug(struct task_struct *curr)
 
         printk("\n");
         printk("=====================================\n");
-        printk("[ BUG: lock held at task exit time! ]\n");
+        printk("[ BUG: %s/%d still has locks held! ]\n",
+               current->comm, task_pid_nr(current));
         print_kernel_ident();
         printk("-------------------------------------\n");
-        printk("%s/%d is exiting with locks still held!\n",
-                curr->comm, task_pid_nr(curr));
-        lockdep_print_held_locks(curr);
-
+        lockdep_print_held_locks(current);
         printk("\nstack backtrace:\n");
         dump_stack();
 }
 
-void debug_check_no_locks_held(struct task_struct *task)
+void debug_check_no_locks_held(void)
 {
-        if (unlikely(task->lockdep_depth > 0))
-                print_held_locks_bug(task);
+        if (unlikely(current->lockdep_depth > 0))
+                print_held_locks_bug();
 }
+EXPORT_SYMBOL_GPL(debug_check_no_locks_held);
 
 void debug_show_all_locks(void)
 {
diff --git a/kernel/power/process.c b/kernel/power/process.c
index 98088e0e71e8..fc0df8486449 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -30,9 +30,10 @@ static int try_to_freeze_tasks(bool user_only)
         unsigned int todo;
         bool wq_busy = false;
         struct timeval start, end;
-        u64 elapsed_csecs64;
-        unsigned int elapsed_csecs;
+        u64 elapsed_msecs64;
+        unsigned int elapsed_msecs;
         bool wakeup = false;
+        int sleep_usecs = USEC_PER_MSEC;
 
         do_gettimeofday(&start);
 
@@ -68,22 +69,25 @@ static int try_to_freeze_tasks(bool user_only)
 
                 /*
                  * We need to retry, but first give the freezing tasks some
-                 * time to enter the refrigerator.
+                 * time to enter the refrigerator.  Start with an initial
+                 * 1 ms sleep followed by exponential backoff until 8 ms.
                  */
-                msleep(10);
+                usleep_range(sleep_usecs / 2, sleep_usecs);
+                if (sleep_usecs < 8 * USEC_PER_MSEC)
+                        sleep_usecs *= 2;
         }
 
         do_gettimeofday(&end);
-        elapsed_csecs64 = timeval_to_ns(&end) - timeval_to_ns(&start);
-        do_div(elapsed_csecs64, NSEC_PER_SEC / 100);
-        elapsed_csecs = elapsed_csecs64;
+        elapsed_msecs64 = timeval_to_ns(&end) - timeval_to_ns(&start);
+        do_div(elapsed_msecs64, NSEC_PER_MSEC);
+        elapsed_msecs = elapsed_msecs64;
 
         if (todo) {
                 printk("\n");
-                printk(KERN_ERR "Freezing of tasks %s after %d.%02d seconds "
+                printk(KERN_ERR "Freezing of tasks %s after %d.%03d seconds "
                        "(%d tasks refusing to freeze, wq_busy=%d):\n",
                        wakeup ? "aborted" : "failed",
-                       elapsed_csecs / 100, elapsed_csecs % 100,
+                       elapsed_msecs / 1000, elapsed_msecs % 1000,
                        todo - wq_busy, wq_busy);
 
                 if (!wakeup) {
@@ -96,8 +100,8 @@ static int try_to_freeze_tasks(bool user_only)
                         read_unlock(&tasklist_lock);
                 }
         } else {
-                printk("(elapsed %d.%02d seconds) ", elapsed_csecs / 100,
-                        elapsed_csecs % 100);
+                printk("(elapsed %d.%03d seconds) ", elapsed_msecs / 1000,
+                        elapsed_msecs % 1000);
         }
 
         return todo ? -EBUSY : 0;
diff --git a/kernel/signal.c b/kernel/signal.c
index 113411bfe8b1..50e41075ac77 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2848,7 +2848,7 @@ int do_sigtimedwait(const sigset_t *which, siginfo_t *info,
                 recalc_sigpending();
                 spin_unlock_irq(&tsk->sighand->siglock);
 
-                timeout = schedule_timeout_interruptible(timeout);
+                timeout = freezable_schedule_timeout_interruptible(timeout);
 
                 spin_lock_irq(&tsk->sighand->siglock);
                 __set_task_blocked(tsk, &tsk->real_blocked);
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 5356b120dbf8..77d251e02593 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -254,7 +254,7 @@ static int rpc_wait_bit_killable(void *word)
 {
         if (fatal_signal_pending(current))
                 return -ERESTARTSYS;
-        freezable_schedule();
+        freezable_schedule_unsafe();
         return 0;
 }
 
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 826e09938bff..c4ce243824bb 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -114,6 +114,7 @@
 #include <linux/mount.h>
 #include <net/checksum.h>
 #include <linux/security.h>
+#include <linux/freezer.h>
 
 struct hlist_head unix_socket_table[2 * UNIX_HASH_SIZE];
 EXPORT_SYMBOL_GPL(unix_socket_table);
@@ -1879,7 +1880,7 @@ static long unix_stream_data_wait(struct sock *sk, long timeo,
 
                 set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
                 unix_state_unlock(sk);
-                timeo = schedule_timeout(timeo);
+                timeo = freezable_schedule_timeout(timeo);
                 unix_state_lock(sk);
                 clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
         }