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libext2fs: use offsetof() from stddef.h

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offsetof is a standard C feature available from stddef.h, going
back all the way to ANSI C.

Signed-off-by: Michael Forney <mforney@mforney.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Michael Forney 2021-04-14 00:41:28 -07:00 committed by Theodore Ts'o
parent 9d5fdcc5db
commit a39e58bab6
1 changed files with 1 additions and 12 deletions
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13
lib/ext2fs/compiler.h
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@ -1,18 +1,7 @@
#ifndef _EXT2FS_COMPILER_H
#define _EXT2FS_COMPILER_H
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
#undef offsetof
#if __has_builtin(__builtin_offsetof)
#define offsetof(TYPE, MEMBER) __builtin_offsetof(TYPE, MEMBER)
#elif defined(__compiler_offsetof)
#define offsetof(TYPE,MEMBER) __compiler_offsetof(TYPE,MEMBER)
#else
#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
#endif
#include <stddef.h>
#ifdef __GNUC__
#define container_of(ptr, type, member) ({ \