debugfs_create_u16 man page on Scientific

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DEBUGFS_CREATE_U16(9)	    The debugfs filesystem	 DEBUGFS_CREATE_U16(9)

       debugfs_create_u16 - create a debugfs file that is used to read and
       write an unsigned 16-bit value

       struct dentry * debugfs_create_u16(const char * name, mode_t mode,
					  struct dentry * parent,
					  u16 * value);

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

	   the permission that the file should have

	   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.

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

       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.

Kernel Hackers Manual 2.6.	 November 2013		 DEBUGFS_CREATE_U16(9)

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