Merge 'x86/alternatives'

arch/arm/include/asm/paravirt.h

arch/arm/kernel/paravirt.c

arch/arm64/include/asm/paravirt.h

arch/arm64/kernel/paravirt.c

arch/x86/Kconfig

arch/x86/entry/entry_32.S

arch/x86/entry/entry_64.S

arch/x86/entry/vdso/vdso32/system_call.S

arch/x86/include/asm/alternative-asm.h

arch/x86/include/asm/alternative.h

arch/x86/include/asm/cpufeature.h

arch/x86/include/asm/cpufeatures.h

arch/x86/include/asm/irqflags.h

arch/x86/include/asm/mshyperv.h

arch/x86/include/asm/nospec-branch.h

arch/x86/include/asm/paravirt.h

arch/x86/include/asm/paravirt_types.h

arch/x86/include/asm/smap.h

arch/x86/kernel/Makefile

arch/x86/kernel/alternative.c