add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/base/base.h
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@@ -1,4 +1,15 @@
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 /* SPDX-License-Identifier: GPL-2.0 */
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+/*
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+ * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
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+ * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
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+ * Copyright (c) 2008-2012 Novell Inc.
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+ * Copyright (c) 2012-2019 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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+ * Copyright (c) 2012-2019 Linux Foundation
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+ *
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+ * Core driver model functions and structures that should not be
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+ * shared outside of the drivers/base/ directory.
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+ *
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+ */
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 #include <linux/notifier.h>
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 /**
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@@ -60,6 +71,7 @@
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  * @knode_parent - node in sibling list
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  * @knode_driver - node in driver list
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  * @knode_bus - node in bus list
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+ * @knode_class - node in class list
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  * @deferred_probe - entry in deferred_probe_list which is used to retry the
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  *	binding of drivers which were unable to get all the resources needed by
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  *	the device; typically because it depends on another driver getting
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@@ -78,8 +90,10 @@
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 	struct klist_node knode_parent;
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 	struct klist_node knode_driver;
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 	struct klist_node knode_bus;
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+	struct klist_node knode_class;
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 	struct list_head deferred_probe;
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 	struct device_driver *async_driver;
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+	char *deferred_probe_reason;
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 	struct device *device;
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 	u8 dead:1;
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 };
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@@ -89,6 +103,8 @@
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 	container_of(obj, struct device_private, knode_driver)
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 #define to_device_private_bus(obj)	\
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 	container_of(obj, struct device_private, knode_bus)
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+#define to_device_private_class(obj)	\
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+	container_of(obj, struct device_private, knode_class)
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 /* initialisation functions */
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 extern int devices_init(void);
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@@ -119,6 +135,8 @@
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 extern void driver_detach(struct device_driver *drv);
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 extern int driver_probe_device(struct device_driver *drv, struct device *dev);
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 extern void driver_deferred_probe_del(struct device *dev);
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+extern void device_set_deferred_probe_reason(const struct device *dev,
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+					     struct va_format *vaf);
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 static inline int driver_match_device(struct device_driver *drv,
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 				      struct device *dev)
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 {
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@@ -161,6 +179,7 @@
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 /* Device links support */
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 extern int device_links_read_lock(void);
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 extern void device_links_read_unlock(int idx);
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+extern int device_links_read_lock_held(void);
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 extern int device_links_check_suppliers(struct device *dev);
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 extern void device_links_driver_bound(struct device *dev);
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 extern void device_links_driver_cleanup(struct device *dev);
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@@ -170,3 +189,11 @@
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 /* device pm support */
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 void device_pm_move_to_tail(struct device *dev);
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+
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+#ifdef CONFIG_DEVTMPFS
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+int devtmpfs_create_node(struct device *dev);
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+int devtmpfs_delete_node(struct device *dev);
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+#else
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+static inline int devtmpfs_create_node(struct device *dev) { return 0; }
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+static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
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+#endif