s390/kernel: unify EX_TABLE* implementations

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _ASM_S390_ASM_CONST_H

#define _ASM_S390_ASM_CONST_H

#ifdef __ASSEMBLY__

#  define stringify_in_c(...)	__VA_ARGS__

#else

/* This version of stringify will deal with commas... */

#  define __stringify_in_c(...)	#__VA_ARGS__

#  define stringify_in_c(...)	__stringify_in_c(__VA_ARGS__) " "

#endif

#endif /* _ASM_S390_ASM_CONST_H */

#ifndef __ASM_LINKAGE_H

#define __ASM_LINKAGE_H

#include <asm/asm-const.h>

#include <linux/stringify.h>

#define __ALIGN .align 4, 0x07

#define __ALIGN_STR __stringify(__ALIGN)

#ifndef __ASSEMBLY__

/*

 * Helper macro for exception table entries

 */

#define EX_TABLE(_fault, _target)	\

	".section __ex_table,\"a\"\n"	\

	".align	4\n"			\

	".long	(" #_fault ") - .\n"	\

	".long	(" #_target ") - .\n"	\

	".previous\n"

#else /* __ASSEMBLY__ */

#define __EX_TABLE(_section, _fault, _target)				\

	stringify_in_c(.section	_section,"a";)				\

	stringify_in_c(.align	4;)					\

	stringify_in_c(.long	(_fault) - .;)				\

	stringify_in_c(.long	(_target) - .;)				\

	stringify_in_c(.previous)

#define EX_TABLE(_fault, _target)					\

	.section __ex_table,"a"	;	\

	.align	4 ;			\

	.long	(_fault) - . ;		\

	.long	(_target) - . ;		\

	.previous

	__EX_TABLE(__ex_table, _fault, _target)

#define EX_TABLE_DMA(_fault, _target)					\

	.section .dma.ex_table, "a" ;	\

	.align	4 ;			\

	.long	(_fault) - . ;		\

	.long	(_target) - . ;		\

	.previous

	__EX_TABLE(.dma.ex_table, _fault, _target)

#endif /* __ASSEMBLY__ */

#endif