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並前往https://docs.huihoo.com/doxygen/linux/kernel/3.7/arch_2arm64_2include_2asm_2spinlock_8h_source.html

Linux Kernel: arch/arm64/include/asm/spinlock.h Source File

45 asm volatile(. 46 " sevl\n". 47 "1: wfe\n". 48 "2: ldaxr %w0, [%1]\n". 49 " cbnz %w0, 1b\n". 50 " stxr %w0, %w2, [%1]\n". 51 " cbnz %w0, 2b\n".

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