Messages in this thread | | | Date | Thu, 20 Nov 2003 03:02:18 +0100 | From | Nico Schottelius <> | Subject | transmeta cpu code question |
| |
Hello!
What does this do:
printk(KERN_INFO "CPU: Processor revision %u.%u.%u.%u, %u MHz\n", (cpu_rev >> 24) & 0xff, (cpu_rev >> 16) & 0xff, (cpu_rev >> 8) & 0xff, cpu_rev & 0xff, cpu_freq);
(from arch/i386/kernel/cpu/transmeta.c)
Does not & 0xff make no sense? 0 & 1 makes 0, 1 & 1 makes 1, no changes.
And I don't understand why we do this for 8bit and shifting the cpu_rev...
Can someone enlighten me (with CC' as I am not subscribed) ?
Nico - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |