Re: [PATCH 2/6] treewide: remove using list iterator after loop body as a ptr

[Matthew Wilcox]

On Tue, Mar 01, 2022 at 10:14:07AM -0800, Kees Cook wrote:
> On Mon, Feb 28, 2022 at 04:45:11PM -0800, Linus Torvalds wrote:
> > Really. The "-Wshadow doesn't work on the kernel" is not some new
> > issue, because you have to do completely insane things to the source
> > code to enable it.
> 
> The first big glitch with -Wshadow was with shadowed global variables.
> GCC 4.8 fixed that, but it still yells about shadowed functions. What
> _almost_ works is -Wshadow=local. At first glace, all the warnings
> look solvable, but then one will eventually discover __wait_event()
> and associated macros that mix when and how deeply it intentionally
> shadows variables. :)

Well, that's just disgusting.  Macros fundamentally shouldn't be
referring to things that aren't in their arguments.  The first step to
cleaning this up is ...

I'll take a look at the rest of cleaning this up soon.