git grep -w arch_unmap shows: arch/powerpc/include/asm/mmu_context.h arch/x86/include/asm/mmu_context.h include/asm-generic/mm_hooks.h mm/mmap.c The generic and x86 versions are empty.
git grep -w arch_unmap shows: arch/powerpc/include/asm/mmu_context.h arch/x86/include/asm/mmu_context.h include/asm-generic/mm_hooks.h mm/mmap.c The generic and x86 versions are empty.