cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

once_lite.h (677B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _LINUX_ONCE_LITE_H
      3#define _LINUX_ONCE_LITE_H
      4
      5#include <linux/types.h>
      6
      7/* Call a function once. Similar to DO_ONCE(), but does not use jump label
      8 * patching via static keys.
      9 */
     10#define DO_ONCE_LITE(func, ...)						\
     11	DO_ONCE_LITE_IF(true, func, ##__VA_ARGS__)
     12#define DO_ONCE_LITE_IF(condition, func, ...)				\
     13	({								\
     14		static bool __section(".data.once") __already_done;	\
     15		bool __ret_do_once = !!(condition);			\
     16									\
     17		if (unlikely(__ret_do_once && !__already_done)) {	\
     18			__already_done = true;				\
     19			func(__VA_ARGS__);				\
     20		}							\
     21		unlikely(__ret_do_once);				\
     22	})
     23
     24#endif /* _LINUX_ONCE_LITE_H */