1 files changed, 63 insertions, 0 deletions
diff --git a/backport-include/linux/debugfs.h b/backport-include/linux/debugfs.h
new file mode 100644
index 0000000..fb50c4f
--- /dev/null
+++ b/backport-include/linux/debugfs.h
@@ -0,0 +1,63 @@
+#ifndef __BACKPORT_DEBUGFS_H_
+#define __BACKPORT_DEBUGFS_H_
+#include_next <linux/debugfs.h>
+#include <linux/version.h>
+#include <linux/device.h>
+#include <generated/utsrelease.h>
+
+#if LINUX_VERSION_IS_LESS(3,19,0)
+#define debugfs_create_devm_seqfile LINUX_BACKPORT(debugfs_create_devm_seqfile)
+#if defined(CONFIG_DEBUG_FS)
+struct dentry *debugfs_create_devm_seqfile(struct device *dev, const char *name,
+					   struct dentry *parent,
+					   int (*read_fn)(struct seq_file *s,
+							  void *data));
+#else
+static inline struct dentry *debugfs_create_devm_seqfile(struct device *dev,
+							 const char *name,
+							 struct dentry *parent,
+					   int (*read_fn)(struct seq_file *s,
+							  void *data))
+{
+	return ERR_PTR(-ENODEV);
+}
+#endif /* CONFIG_DEBUG_FS */
+#endif /* LINUX_VERSION_IS_LESS(3,19,0) */
+
+#if LINUX_VERSION_IS_LESS(4,4,0)
+#define debugfs_create_bool LINUX_BACKPORT(debugfs_create_bool)
+#ifdef CONFIG_DEBUG_FS
+struct dentry *debugfs_create_bool(const char *name, umode_t mode,
+				   struct dentry *parent, bool *value);
+#else
+static inline struct dentry *
+debugfs_create_bool(const char *name, umode_t mode,
+		    struct dentry *parent, bool *value)
+{
+	return ERR_PTR(-ENODEV);
+}
+#endif
+#endif /* LINUX_VERSION_IS_LESS(4,4,0) */
+
+#if LINUX_VERSION_IS_LESS(4,9,0) && \
+    !LINUX_VERSION_IN_RANGE(4,8,4, 4,9,0) && \
+    !LINUX_VERSION_IN_RANGE(4,7,10, 4,8,0)
+static inline const struct file_operations *
+debugfs_real_fops(const struct file *filp)
+{
+	/*
+	 * Neither the pointer to the struct file_operations, nor its
+	 * contents ever change -- srcu_dereference() is not needed here.
+	 */
+	return filp->f_path.dentry->d_fsdata;
+}
+#endif /* <4.9.0 but not >= 4.8.4, 4.7.10 */
+
+#ifndef DEFINE_DEBUGFS_ATTRIBUTE
+#define DEFINE_DEBUGFS_ATTRIBUTE(__fops, __get, __set, __fmt) \
+	DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt)
+#define debugfs_create_file_unsafe(name, mode, parent, data, fops) \
+	debugfs_create_file(name, mode, parent, data, fops)
+#endif
+
+#endif /* __BACKPORT_DEBUGFS_H_ */