Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / klist.h

diff --git a/kernel/include/linux/klist.h b/kernel/include/linux/klist.h
new file mode 100644 (file)
index 0000000..61e5b72
--- /dev/null
+++ b/kernel/include/linux/klist.h
@@ -0,0 +1,68 @@
+/*
+ *     klist.h - Some generic list helpers, extending struct list_head a bit.
+ *
+ *     Implementations are found in lib/klist.c
+ *
+ *
+ *     Copyright (C) 2005 Patrick Mochel
+ *
+ *     This file is rleased under the GPL v2.
+ */
+
+#ifndef _LINUX_KLIST_H
+#define _LINUX_KLIST_H
+
+#include <linux/spinlock.h>
+#include <linux/kref.h>
+#include <linux/list.h>
+
+struct klist_node;
+struct klist {
+       spinlock_t              k_lock;
+       struct list_head        k_list;
+       void                    (*get)(struct klist_node *);
+       void                    (*put)(struct klist_node *);
+} __attribute__ ((aligned (sizeof(void *))));
+
+#define KLIST_INIT(_name, _get, _put)                                  \
+       { .k_lock       = __SPIN_LOCK_UNLOCKED(_name.k_lock),           \
+         .k_list       = LIST_HEAD_INIT(_name.k_list),                 \
+         .get          = _get,                                         \
+         .put          = _put, }
+
+#define DEFINE_KLIST(_name, _get, _put)                                        \
+       struct klist _name = KLIST_INIT(_name, _get, _put)
+
+extern void klist_init(struct klist *k, void (*get)(struct klist_node *),
+                      void (*put)(struct klist_node *));
+
+struct klist_node {
+       void                    *n_klist;       /* never access directly */
+       struct list_head        n_node;
+       struct kref             n_ref;
+};
+
+extern void klist_add_tail(struct klist_node *n, struct klist *k);
+extern void klist_add_head(struct klist_node *n, struct klist *k);
+extern void klist_add_behind(struct klist_node *n, struct klist_node *pos);
+extern void klist_add_before(struct klist_node *n, struct klist_node *pos);
+
+extern void klist_del(struct klist_node *n);
+extern void klist_remove(struct klist_node *n);
+
+extern int klist_node_attached(struct klist_node *n);
+
+
+struct klist_iter {
+       struct klist            *i_klist;
+       struct klist_node       *i_cur;
+};
+
+
+extern void klist_iter_init(struct klist *k, struct klist_iter *i);
+extern void klist_iter_init_node(struct klist *k, struct klist_iter *i,
+                                struct klist_node *n);
+extern void klist_iter_exit(struct klist_iter *i);
+extern struct klist_node *klist_next(struct klist_iter *i);
+
+#endif