Re: [PATCH] lfsr: a simple binary Galois linear feedback shift register

From: Waiman Long
Date: Wed Apr 01 2015 - 10:09:11 EST

On 04/01/2015 03:45 AM, Peter Zijlstra wrote:
On Tue, Mar 31, 2015 at 01:28:09PM -0400, Waiman Long wrote:
This patch is based on the code sent out by Peter Zijstra as part
of his queue spinlock patch to provide a hashing function with open
addressing. The lfsr() function can be used to return a sequence of
numbers that cycle through all the bit patterns (2^n -1) of a given
bit width n except the value 0 in a somewhat random fashion depending
on the LFSR tap that is being used.

This code should be a standalone patch and not part of a larger
patch series.
Yeah, except we don't merge code without users, which is why such stuff
typically gets a lift on the larger series you mention.

OK, if that is the case, I will embedded it in the qspinlock series.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at