Re: [PATCH] bluetooth.h: __ variants of u8 and friends are not neccessary inside kernel
From: Joe Perches
Date: Wed Oct 05 2016 - 18:29:09 EST
On Thu, 2016-10-06 at 00:13 +0200, Pavel Machek wrote:
> On Wed 2016-10-05 12:15:34, Joe Perches wrote:
> > On Wed, 2016-10-05 at 21:11 +0200, Pavel Machek wrote:
> > > On Wed 2016-10-05 10:53:16, Joe Perches wrote:
> > > > trivia:
> > > > It's generally faster to use bool instead of u8 foo:1;
> > > Ok, but I'm not changing that in this patch.
> > > (And actually, bool will take a lot more memory, right?)
> > No worries, and bool is the same size as u8.
> Exactly what I'm talking about :-). One byte vs. one bit, right?
Memory isn't bit addressable.
So it's the same byte, it just doesn't use a read/modify/write
operation to update a value.