99ac48f54a
Mark the f_ops members of inodes as const, as well as fix the ripple-through this causes by places that copy this f_ops and then "do stuff" with it. Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
/*
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* debugfs.h - a tiny little debug file system
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*
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* Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 2004 IBM Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* debugfs is for people to use instead of /proc or /sys.
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* See Documentation/DocBook/kernel-api for more details.
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*/
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#ifndef _DEBUGFS_H_
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#define _DEBUGFS_H_
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#include <linux/fs.h>
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#include <linux/types.h>
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struct file_operations;
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struct debugfs_blob_wrapper {
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void *data;
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unsigned long size;
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};
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#if defined(CONFIG_DEBUG_FS)
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struct dentry *debugfs_create_file(const char *name, mode_t mode,
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struct dentry *parent, void *data,
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const struct file_operations *fops);
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struct dentry *debugfs_create_dir(const char *name, struct dentry *parent);
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void debugfs_remove(struct dentry *dentry);
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struct dentry *debugfs_create_u8(const char *name, mode_t mode,
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struct dentry *parent, u8 *value);
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struct dentry *debugfs_create_u16(const char *name, mode_t mode,
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struct dentry *parent, u16 *value);
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struct dentry *debugfs_create_u32(const char *name, mode_t mode,
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struct dentry *parent, u32 *value);
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struct dentry *debugfs_create_bool(const char *name, mode_t mode,
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struct dentry *parent, u32 *value);
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struct dentry *debugfs_create_blob(const char *name, mode_t mode,
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struct dentry *parent,
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struct debugfs_blob_wrapper *blob);
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#else
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#include <linux/err.h>
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/*
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* We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
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* so users have a chance to detect if there was a real error or not. We don't
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* want to duplicate the design decision mistakes of procfs and devfs again.
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*/
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static inline struct dentry *debugfs_create_file(const char *name, mode_t mode,
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struct dentry *parent,
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void *data,
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struct file_operations *fops)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_dir(const char *name,
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struct dentry *parent)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline void debugfs_remove(struct dentry *dentry)
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{ }
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static inline struct dentry *debugfs_create_u8(const char *name, mode_t mode,
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struct dentry *parent,
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u8 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_u16(const char *name, mode_t mode,
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struct dentry *parent,
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u16 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
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struct dentry *parent,
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u32 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
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struct dentry *parent,
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u32 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
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struct dentry *parent,
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struct debugfs_blob_wrapper *blob)
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{
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return ERR_PTR(-ENODEV);
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}
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#endif
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#endif
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