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kernel add
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#ifndef _TOOLS_LINUX_ASM_ARM_BARRIER_H
#define _TOOLS_LINUX_ASM_ARM_BARRIER_H
/*
* Use the __kuser_memory_barrier helper in the CPU helper page. See
* arch/arm/kernel/entry-armv.S in the kernel source for details.
*/
#define mb() ((void(*)(void))0xffff0fa0)()
#define wmb() ((void(*)(void))0xffff0fa0)()
#define rmb() ((void(*)(void))0xffff0fa0)()
#endif /* _TOOLS_LINUX_ASM_ARM_BARRIER_H */
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