nop                 7 arch/arm/include/asm/barrier.h #define nop() __asm__ __volatile__("mov\tr0,r0\t@ nop\n\t");
nop                 9 arch/csky/include/asm/barrier.h #define nop()	asm volatile ("nop\n":::"memory")
nop                15 arch/riscv/include/asm/barrier.h #define nop()		__asm__ __volatile__ ("nop")
nop               225 arch/x86/include/asm/special_insns.h #define nop() asm volatile ("nop")
nop                19 include/asm-generic/barrier.h #define nop()	asm volatile ("nop")