linux-2.6.33/__used の履歴(No.2)

• 履歴一覧
• 差分 を表示
• 現在との差分 を表示
• ソース を表示
• linux-2.6.33/__used へ行く。
  • 1 (2010-11-10 (水) 21:33:50)
  • 2 (2010-11-10 (水) 21:36:40)

参照元†

• linux-2.6.33/__EXPORT_SYMBOL()
• linux-2.6.33/__mutex_lock_slowpath()
• linux-2.6.33/current_stack_pointer(global)(x86)

説明†

• パス: linux-2.6.33/include/linux/compiler.h
  • gcc3 版: linux-2.6.33/include/linux/compiler-gcc3.h
  • gcc4 版: linux-2.6.33/include/linux/compiler-gcc4.h

• FIXME: これは何？
  • 説明

参考†

実装†

include/linux/compiler.h†

/*
 * Allow us to avoid 'defined but not used' warnings on functions and data,
 * as well as force them to be emitted to the assembly file.
 *
 * As of gcc 3.4, static functions that are not marked with attribute((used))
 * may be elided from the assembly file.  As of gcc 3.4, static data not so
 * marked will not be elided, but this may change in a future gcc version.
 *
 * NOTE: Because distributions shipped with a backported unit-at-a-time
 * compiler in gcc 3.3, we must define __used to be __attribute__((used))
 * for gcc >=3.3 instead of 3.4.
 *
 * In prior versions of gcc, such functions and data would be emitted, but
 * would be warned about except with attribute((unused)).
 *
 * Mark functions that are referenced only in inline assembly as __used so
 * the code is emitted even though it appears to be unreferenced.
 */
#ifndef __used
# define __used			/* unimplemented */
#endif

include/linux/compiler-gcc3.h†

#if __GNUC_MINOR__ >= 3
# define __used			__attribute__((__used__))
#else
# define __used			__attribute__((__unused__))
#endif

include/linux/compiler-gcc4.h†

#define __used			__attribute__((__used__))

コメント†