u-boot/include/linux/stddef.h

#ifndef _LINUX_STDDEF_H
#define _LINUX_STDDEF_H

#include <linux/compiler_types.h>

#undef NULL
#if defined(__cplusplus)
#define NULL 0
#else
#define NULL ((void *)0)
#endif

#ifndef _SIZE_T
#include <linux/types.h>
#endif

#undef offsetof
#define offsetof(TYPE, MEMBER)	__builtin_offsetof(TYPE, MEMBER)

#endif
Initial revision 2002-03-31 12:34:56 +00:00			`#ifndef _LINUX_STDDEF_H`
			`#define _LINUX_STDDEF_H`

stddef: Avoid warning with clang with offsetof() Some bright sparks have decided that a cast on a constant cannot be a constant, so offsetof() produces this warning on clang-10: include/intel_gnvs.h:113:1: error: static_assert expression is not an integral constant expression check_member(acpi_global_nvs, unused2, GNVS_CHROMEOS_ACPI_OFFSET); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/kernel.h:284:2: note: expanded from macro 'check_member' offsetof(struct structure, member) == (offset), \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/stddef.h:20:32: note: expanded from macro 'offsetof' ^ include/intel_gnvs.h:113:1: note: cast that performs the conversions of a reinterpret_cast is ot allowed in a constant expression include/linux/stddef.h:20:33: note: expanded from macro 'offsetof' Fix it by using the compiler built-in version, if available. This syncs the function to the same implementation as Linux v5.16 in this header file. Signed-off-by: Simon Glass <sjg@chromium.org> 2022-01-13 13:47:55 +00:00			`#include <linux/compiler_types.h>`

Initial revision 2002-03-31 12:34:56 +00:00			`#undef NULL`
			`#if defined(__cplusplus)`
			`#define NULL 0`
			`#else`
			`#define NULL ((void *)0)`
			`#endif`

			`#ifndef _SIZE_T`
			`#include <linux/types.h>`
			`#endif`

			`#undef offsetof`
Fix sparse checks processing A lot of errors are encountered when building with sparse checking activated (make C=1 or make C=2). Many of them are fixed in Linux. Resynchronise Makefile and include/linux/build_bug.h with Linux kernel sources by porting the following Linux commits into u-boot: - 6c49f359ca14 ("kbuild: disable sparse warnings about unknown attributes") - 80591e61a0f7 ("kbuild: tell sparse about the $ARCH") - 8788994376d8 ("linux/build_bug.h: change type to int") - 527edbc18a70 ("build_bug.h: remove most of dummy BUILD_BUG_ON stubs for Sparse") - c60d3b79423a ("build_bug.h: remove negative-array fallback for BUILD_BUG_ON()") - 14e83077d55f ("include: drop pointless __compiler_offsetof indirection") Also revert commit aa9e891c63 ("include/linux/stddef.h: avoid 'warning: preprocessor token offsetof redefined'") because the error it creates is worse than the warning it is trying to fix. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> 2023-05-05 08:39:39 +00:00			`#define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)`
Initial revision 2002-03-31 12:34:56 +00:00
			`#endif`