__arch_um__      1249 kernel/signal.c #if defined(__i386__) && !defined(__arch_um__)
__arch_um__        32 lib/raid6/algos.c #if defined(__i386__) && !defined(__arch_um__)
__arch_um__        48 lib/raid6/algos.c #if defined(__x86_64__) && !defined(__arch_um__)
__arch_um__        17 lib/raid6/x86.h #if (defined(__i386__) || defined(__x86_64__)) && !defined(__arch_um__)