include/asm/setup.h (4 lines of code) (raw):
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef SETUP_H_INCLUDED
#define SETUP_H_INCLUDED
/* POSIX mandated with _POSIX_ARG_MAX that we can rely on 4096 chars in the
* command line, so this choice is ok.
*/
#define COMMAND_LINE_SIZE 4096
#endif /* SETUP_H_INCLUDED */