linux-5.15/unlikely() の履歴(No.1)

• 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-5.15/unlikely() へ行く。
  • 1 (2025-09-13 (土) 01:40:01)

参照元†

• linux-5.15/__rmqueue()
• linux-5.15/__rmqueue_pcplist()
• linux-5.15/get_page_from_freelist()
• linux-5.15/isolate_lru_pages()
• linux-5.15/kcompactd()
• linux-5.15/rmqueue_bulk()
• linux-5.15/shrink_inactive_list()
• linux-5.15/shrink_page_list()

説明†

• パス: [[linux-5.15/]]

• FIXME: これは何？
  • 説明

引数†

返り値†

参考†

実装†

/*
 * Note: DISABLE_BRANCH_PROFILING can be used by special lowlevel code
 * to disable branch tracing on a per file basis.
 */
#if defined(CONFIG_TRACE_BRANCH_PROFILING) \
    && !defined(DISABLE_BRANCH_PROFILING) && !defined(__CHECKER__)
/*
 * Using __builtin_constant_p(x) to ignore cases where the return
 * value is always the same.  This idea is taken from a similar patch
 * written by Daniel Walker.
 */
# ifndef likely
#  define likely(x)	(__branch_check__(x, 1, __builtin_constant_p(x)))
# endif
# ifndef unlikely
#  define unlikely(x)	(__branch_check__(x, 0, __builtin_constant_p(x)))
# endif
 
#endif /* CONFIG_PROFILE_ALL_BRANCHES */

#else
# define likely(x)	__builtin_expect(!!(x), 1)
# define unlikely(x)	__builtin_expect(!!(x), 0)
# define likely_notrace(x)	likely(x)
# define unlikely_notrace(x)	unlikely(x)
#endif

• • [[linux-5.15/]]

コメント†