Use definitions from `<linux/mman.h>` to dispatch arch-specific flag values. For example, `MCL_CURRENT/MCL_FUTURE/MCL_ONFAULT` are different on different architectures.
Use definitions from `<linux/mman.h>` to dispatch arch-specific flag values. For example, `MCL_CURRENT/MCL_FUTURE/MCL_ONFAULT` are different on different architectures.