ipc/msg.c: Fix lost wakeup in msgsnd().

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / ipc / util.h

diff --git a/ipc/util.h b/ipc/util.h
index 2b0bdd5d92ce51415ae3243766f0acac1caffd33..b6a6a88f30024f17dff00e7257c622dca2af1912 100644 (file)
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -159,21 +159,31 @@ static inline int ipc_checkid(struct kern_ipc_perm *ipcp, int uid)
        return uid / SEQ_MULTIPLIER != ipcp->seq;
 }
 
-static inline void ipc_lock_by_ptr(struct kern_ipc_perm *perm)
+static inline void ipc_lock_object(struct kern_ipc_perm *perm)
 {
-       rcu_read_lock();
        spin_lock(&perm->lock);
 }
 
-static inline void ipc_unlock(struct kern_ipc_perm *perm)
+static inline void ipc_unlock_object(struct kern_ipc_perm *perm)
 {
        spin_unlock(&perm->lock);
-       rcu_read_unlock();
 }
 
-static inline void ipc_lock_object(struct kern_ipc_perm *perm)
+static inline void ipc_assert_locked_object(struct kern_ipc_perm *perm)
 {
-       spin_lock(&perm->lock);
+       assert_spin_locked(&perm->lock);
+}
+
+static inline void ipc_lock_by_ptr(struct kern_ipc_perm *perm)
+{
+       rcu_read_lock();
+       ipc_lock_object(perm);
+}
+
+static inline void ipc_unlock(struct kern_ipc_perm *perm)
+{
+       ipc_unlock_object(perm);
+       rcu_read_unlock();
 }
 
 struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids, int id);