| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _LINUX_SYNC_CORE_H |
| #define _LINUX_SYNC_CORE_H |
| |
| #ifdef CONFIG_ARCH_HAS_SYNC_CORE_BEFORE_USERMODE |
| #include <asm/sync_core.h> |
| #else |
| /* |
| * This is a dummy sync_core_before_usermode() implementation that can be used |
| * on all architectures which return to user-space through core serializing |
| * instructions. |
| * If your architecture returns to user-space through non-core-serializing |
| * instructions, you need to write your own functions. |
| */ |
| static inline void sync_core_before_usermode(void) |
| { |
| } |
| #endif |
| |
| #ifdef CONFIG_ARCH_HAS_PREPARE_SYNC_CORE_CMD |
| #include <asm/sync_core.h> |
| #else |
| /* |
| * This is a dummy prepare_sync_core_cmd() implementation that can be used on |
| * all architectures which provide unconditional core serializing instructions |
| * in switch_mm(). |
| * If your architecture doesn't provide such core serializing instructions in |
| * switch_mm(), you may need to write your own functions. |
| */ |
| static inline void prepare_sync_core_cmd(struct mm_struct *mm) |
| { |
| } |
| #endif |
| |
| #endif /* _LINUX_SYNC_CORE_H */ |
