1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_SYNC_CORE_H 3 #define _LINUX_SYNC_CORE_H 4 5 #ifdef CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE 6 #include <asm/sync_core.h> 7 #else 8 /* 9 * This is a dummy sync_core_before_usermode() implementation that can be used 10 * on all architectures which return to user-space through core serializing 11 * instructions. 12 * If your architecture returns to user-space through non-core-serializing 13 * instructions, you need to write your own functions. 14 */ sync_core_before_usermode(void)15static inline void sync_core_before_usermode(void) 16 { 17 } 18 #endif 19 20 #ifdef CONFIG_ARCH_HAS_PREPARE_SYNC_CORE_CMD 21 #include <asm/sync_core.h> 22 #else 23 /* 24 * This is a dummy prepare_sync_core_cmd() implementation that can be used on 25 * all architectures which provide unconditional core serializing instructions 26 * in switch_mm(). 27 * If your architecture doesn't provide such core serializing instructions in 28 * switch_mm(), you may need to write your own functions. 29 */ prepare_sync_core_cmd(struct mm_struct * mm)30static inline void prepare_sync_core_cmd(struct mm_struct *mm) 31 { 32 } 33 #endif 34 35 #endif /* _LINUX_SYNC_CORE_H */ 36