4 files changed, 22 insertions, 0 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index c509cc4a0d53..987b28a1f01b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1304,6 +1304,10 @@ static struct task_struct *copy_process(unsigned long clone_flags,
         p->memcg_batch.do_batch = 0;
         p->memcg_batch.memcg = NULL;
 #endif
+#ifdef CONFIG_BCACHE
+        p->sequential_io        = 0;
+        p->sequential_io_avg    = 0;
+#endif
 
         /* Perform scheduler related setup. Assign this task to a CPU. */
         sched_fork(p);
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 6a3bccba7e7d..1f3186b37fd5 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -2998,6 +2998,7 @@ void lockdep_init_map(struct lockdep_map *lock, const char *name,
 EXPORT_SYMBOL_GPL(lockdep_init_map);
 
 struct lock_class_key __lockdep_no_validate__;
+EXPORT_SYMBOL_GPL(__lockdep_no_validate__);
 
 static int
 print_lock_nested_lock_not_held(struct task_struct *curr,
diff --git a/kernel/rwsem.c b/kernel/rwsem.c
index b3c6c3fcd847..cfff1435bdfb 100644
--- a/kernel/rwsem.c
+++ b/kernel/rwsem.c
@@ -126,6 +126,15 @@ void _down_write_nest_lock(struct rw_semaphore *sem, struct lockdep_map *nest)
 
 EXPORT_SYMBOL(_down_write_nest_lock);
 
+void down_read_non_owner(struct rw_semaphore *sem)
+{
+        might_sleep();
+
+        __down_read(sem);
+}
+
+EXPORT_SYMBOL(down_read_non_owner);
+
 void down_write_nested(struct rw_semaphore *sem, int subclass)
 {
         might_sleep();
@@ -136,6 +145,13 @@ void down_write_nested(struct rw_semaphore *sem, int subclass)
 
 EXPORT_SYMBOL(down_write_nested);
 
+void up_read_non_owner(struct rw_semaphore *sem)
+{
+        __up_read(sem);
+}
+
+EXPORT_SYMBOL(up_read_non_owner);
+
 #endif
 
 
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index ed58a3216a6d..b8b8560bfb95 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -1808,6 +1808,7 @@ void blk_fill_rwbs(char *rwbs, u32 rw, int bytes)
 
         rwbs[i] = '\0';
 }
+EXPORT_SYMBOL_GPL(blk_fill_rwbs);
 
 #endif /* CONFIG_EVENT_TRACING */