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

On Mon, Feb 28, 2022 at 12:10:24PM -0800, Linus Torvalds wrote:

We can do

    typeof(pos) pos

in the 'for ()' loop, and never use __iter at all.

That means that inside the for-loop, we use a _different_ 'pos' than outside.

Then we can never use -Wshadow ;-( I'd love to be able to turn it on; it catches real bugs.

+#define list_for_each_entry(pos, head, member) \

• for (typeof(pos) pos = list_first_entry(head, typeof(*pos), member); \

•     !list_entry_is_head(pos, head, member);	\
    pos = list_next_entry(pos, member))