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