__HAVE_ARCH_START_CONTEXT_SWITCH  142 arch/sparc/include/asm/mmu_context_64.h #define  __HAVE_ARCH_START_CONTEXT_SWITCH
__HAVE_ARCH_START_CONTEXT_SWITCH  603 arch/x86/include/asm/paravirt.h #define  __HAVE_ARCH_START_CONTEXT_SWITCH