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 | */ |
15 | static 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 | */ |
30 | static inline void prepare_sync_core_cmd(struct mm_struct *mm) |
31 | { |
32 | } |
33 | #endif |
34 | |
35 | #endif /* _LINUX_SYNC_CORE_H */ |
36 | |