Hi! I started arm linux kernel hacking. I can't understand 554 line. I think that 554 line is not necessary. Because ISB instruction(556 line) makes synchronization between 553 and 557. Please advice to me. 530 __armv7_mmu_cache_on: . . . 553 mcr p15, 0, r0, c1, c0, 0 @ load control register 554 mrc p15, 0, r0, c1, c0, 0 @ and read it back 555 mov r0, #0 556 mcr p15, 0, r0, c7, c5, 4 @ ISB 557 mov pc, r12 Have a nice day. MH Hong. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html