/* SPDX-License-Identifier: GPL-2.0 */#ifndef _ASM_GENERIC_ERROR_INJECTION_H#define _ASM_GENERIC_ERROR_INJECTION_H #if defined(__KERNEL__) && !defined(__ASSEMBLY__)enum {	EI_ETYPE_NULL,		/* Return NULL if failure */	EI_ETYPE_ERRNO,		/* Return -ERRNO if failure */	EI_ETYPE_ERRNO_NULL,	/* Return -ERRNO or NULL if failure */	EI_ETYPE_TRUE,		/* Return true if failure */}; struct error_injection_entry {	unsigned long	addr;	int		etype;}; struct pt_regs; #ifdef CONFIG_FUNCTION_ERROR_INJECTION/* * Whitelist generating macro. Specify functions which can be error-injectable * using this macro. If you unsure what is required for the error-injectable * functions, please read Documentation/fault-injection/fault-injection.rst * 'Error Injectable Functions' section. */#define ALLOW_ERROR_INJECTION(fname, _etype)				\static struct error_injection_entry __used				\	__section("_error_injection_whitelist")				\	_eil_addr_##fname = {						\		.addr = (unsigned long)fname,				\		.etype = EI_ETYPE_##_etype,				\	} void override_function_with_return(struct pt_regs *regs);#else#define ALLOW_ERROR_INJECTION(fname, _etype) static inline void override_function_with_return(struct pt_regs *regs) { }#endif#endif #endif /* _ASM_GENERIC_ERROR_INJECTION_H */