debugfs_create_bool
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## Name

debugfs_create_bool — create a debugfs file that is used to read and write a boolean value

## Synopsis

`struct dentry * debugfs_create_bool (` | const char * name,
| umode_t mode,
| struct dentry * parent,
| u32 * value`)`;

## Arguments

`name`

  a pointer to a string containing the name of the file to create.

`mode`

  the permission that the file should have

`parent`

  a pointer to the parent dentry for this file. This should be a directory dentry if set. If this parameter is `NULL`, then the file will be created in the root of the debugfs filesystem.

`value`

  a pointer to the variable that the file should read to and write from.

## Description

This function creates a file in debugfs with the given name that contains the value of the variable `value`. If the `mode` variable is so set, it can be read from, and written to.

This function will return a pointer to a dentry if it succeeds. This pointer must be passed to the `debugfs_remove` function when the file is to be removed (no automatic cleanup happens if your module is unloaded, you are responsible here.) If an error occurs, `NULL` will be returned.

If debugfs is not enabled in the kernel, the value -`ENODEV` will be returned. It is not wise to check for this value, but rather, check for `NULL` or !`NULL` instead as to eliminate the need for #ifdef in the calling code.

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