ipc,sem: do not hold ipc lock more than necessary

[platform/adaptation/renesas_rcar/renesas_kernel.git] / ipc / util.h

diff --git a/ipc/util.h b/ipc/util.h
index bfc8d4e..c36b997 100644 (file)
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -128,6 +128,9 @@ struct kern_ipc_perm *ipc_obtain_object(struct ipc_ids *ids, int id);
 void kernel_to_ipc64_perm(struct kern_ipc_perm *in, struct ipc64_perm *out);
 void ipc64_perm_to_ipc_perm(struct ipc64_perm *in, struct ipc_perm *out);
 int ipc_update_perm(struct ipc64_perm *in, struct kern_ipc_perm *out);
+struct kern_ipc_perm *ipcctl_pre_down_nolock(struct ipc_namespace *ns,
+                                            struct ipc_ids *ids, int id, int cmd,
+                                            struct ipc64_perm *perm, int extra_perm);
 struct kern_ipc_perm *ipcctl_pre_down(struct ipc_namespace *ns,
                                      struct ipc_ids *ids, int id, int cmd,
                                      struct ipc64_perm *perm, int extra_perm);
@@ -168,6 +171,11 @@ static inline void ipc_unlock(struct kern_ipc_perm *perm)
        rcu_read_unlock();
 }
 
+static inline void ipc_lock_object(struct kern_ipc_perm *perm)
+{
+       spin_lock(&perm->lock);
+}
+
 struct kern_ipc_perm *ipc_lock_check(struct ipc_ids *ids, int id);
 struct kern_ipc_perm *ipc_obtain_object_check(struct ipc_ids *ids, int id);
 int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,