cpu_is_r4600_v2_x  130 arch/mips/mm/c-r4k.c #define cpu_is_r4600_v2_x()	((read_c0_prid() & 0xfffffff0) == 0x00002020)
cpu_is_r4600_v2_x   72 arch/mips/mm/page.c #define cpu_is_r4600_v2_x()	((read_c0_prid() & 0xfffffff0) == 0x00002020)