linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * This file defines the trace event structures that go into the ring

 * buffer directly. They are created via macros so that changes for them

 * appear in the format file. Using macros will automate this process.

 *

 * The macro used to create a ftrace data structure is:

 *

 * FTRACE_ENTRY( name, struct_name, id, structure, print )

 *

 * @name: the name used the event name, as well as the name of

 *   the directory that holds the format file.

 *

 * @struct_name: the name of the structure that is created.

 *

 * @id: The event identifier that is used to detect what event

 *    this is from the ring buffer.

 *

 * @structure: the structure layout

 *

 *  - __field(  type,   item    )

 *    This is equivalent to declaring

 *      type    item;

 *    in the structure.

 *  - __array(  type,   item,   size    )

 *    This is equivalent to declaring

 *      type    item[size];

 *    in the structure.

 *

 *   * for structures within structures, the format of the internal

 *  structure is laid out. This allows the internal structure

 *  to be deciphered for the format file. Although these macros

 *  may become out of sync with the internal structure, they

 *  will create a compile error if it happens. Since the

 *  internel structures are just tracing helpers, this is not

 *  an issue.

 *

 *  When an internal structure is used, it should use:

 *

 *  __field_struct( type,   item    )

 *

 *  instead of __field. This will prevent it from being shown in

 *  the output file. The fields in the structure should use.

 *

 *  __field_desc(   type,   container,  item        )

 *  __array_desc(   type,   container,  item,   len )

 *

 *  type, item and len are the same as __field and __array, but

 *  container is added. This is the name of the item in

 *  __field_struct that this is describing.

 *

 *

 * @print: the print format shown to users in the format file.

 */

​

/*

 * Function trace entry - function address and parent function address:

 */

FTRACE_ENTRY_REG(function, ftrace_entry,

​

    TRACE_FN,

​

    F_STRUCT(