1. 4301785 um/x86: merge 32 and 64bit variants of checksum.h by Al Viro · 12 years ago
  2. 5c48b10 um: take arch/um/sys-x86 to arch/x86/um by Al Viro · 13 years ago[Renamed from arch/um/sys-x86/asm/checksum.h]
  3. 27f85f1 um: merge arch/um/sys-{i386,x86_64}/asm by Al Viro · 13 years ago