Merge tag 'v4.8-rc1' into patchwork

Linux 4.8-rc1

* tag 'v4.8-rc1': (6093 commits)
  Linux 4.8-rc1
  block: rename bio bi_rw to bi_opf
  target: iblock_execute_sync_cache() should use bio_set_op_attrs()
  mm: make __swap_writepage() use bio_set_op_attrs()
  block/mm: make bdev_ops->rw_page() take a bool for read/write
  fs: return EPERM on immutable inode
  ramoops: use persistent_ram_free() instead of kfree() for freeing prz
  ramoops: use DT reserved-memory bindings
  NTB: ntb_hw_intel: use local variable pdev
  NTB: ntb_hw_intel: show BAR size in debugfs info
  ntb_test: Add a selftest script for the NTB subsystem
  ntb_perf: clear link_is_up flag when the link goes down.
  ntb_pingpong: Add a debugfs file to get the ping count
  ntb_tool: Add link status and files to debugfs
  ntb_tool: Postpone memory window initialization for the user
  ntb_perf: Wait for link before running test
  ntb_perf: Return results by reading the run file
  ntb_perf: Improve thread handling to increase robustness
  ntb_perf: Schedule based on time not on performance
  ntb_transport: Check the number of spads the hardware supports
  ...

1 files changed, 73 insertions, 0 deletions

diff --git a/include/linux/fence-array.h b/include/linux/fence-array.h
new file mode 100644
index 000000000000..86baaa45567c
--- /dev/null
+++ b/include/linux/fence-array.h
@@ -0,0 +1,73 @@
+/*
+ * fence-array: aggregates fence to be waited together
+ *
+ * Copyright (C) 2016 Collabora Ltd
+ * Copyright (C) 2016 Advanced Micro Devices, Inc.
+ * Authors:
+ *	Gustavo Padovan <gustavo@padovan.org>
+ *	Christian König <christian.koenig@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __LINUX_FENCE_ARRAY_H
+#define __LINUX_FENCE_ARRAY_H
+
+#include <linux/fence.h>
+
+/**
+ * struct fence_array_cb - callback helper for fence array
+ * @cb: fence callback structure for signaling
+ * @array: reference to the parent fence array object
+ */
+struct fence_array_cb {
+	struct fence_cb cb;
+	struct fence_array *array;
+};
+
+/**
+ * struct fence_array - fence to represent an array of fences
+ * @base: fence base class
+ * @lock: spinlock for fence handling
+ * @num_fences: number of fences in the array
+ * @num_pending: fences in the array still pending
+ * @fences: array of the fences
+ */
+struct fence_array {
+	struct fence base;
+
+	spinlock_t lock;
+	unsigned num_fences;
+	atomic_t num_pending;
+	struct fence **fences;
+};
+
+extern const struct fence_ops fence_array_ops;
+
+/**
+ * to_fence_array - cast a fence to a fence_array
+ * @fence: fence to cast to a fence_array
+ *
+ * Returns NULL if the fence is not a fence_array,
+ * or the fence_array otherwise.
+ */
+static inline struct fence_array *to_fence_array(struct fence *fence)
+{
+	if (fence->ops != &fence_array_ops)
+		return NULL;
+
+	return container_of(fence, struct fence_array, base);
+}
+
+struct fence_array *fence_array_create(int num_fences, struct fence **fences,
+				       u64 context, unsigned seqno,
+				       bool signal_on_any);
+
+#endif /* __LINUX_FENCE_ARRAY_H */