Linux does well with some macros: IS_ERR, IS_ERR_VALUE, PTR_ERR, ERR_PTR, PTR_ERR_OR_ZERO, ERR_CAST, IS_ERR_OR_NULL https://elixir.bootlin.com/linux/latest/sou

Linux does well with some macros: IS_ERR, IS_ERR_VALUE, PTR_ERR, ERR_PTR, PTR_ERR_OR_ZERO, ERR_CAST, IS_ERR_OR_NULL https://elixir.bootlin.com/linux/latest/source/include/linux/err.h https://elixir.bootlin.com/linux/latest/source/include/linux... No, it doesn't totally replace NULL, but it does solve some of the problems in a high-performance way.