[PATCH 04/16] malloc: Simplify __mtag_tag_new_usable

[Szabolcs Nagy]

The 03/04/2021 19:20, DJ Delorie wrote:
> Szabolcs Nagy <szabolcs.nagy@arm.com> writes:
> > The chunk cannot be a dumped one here.
> 
> What about the realloc-expand case in malloc.c:4819 ?

that's in _int_realloc and it seems _int_realloc
is never called on dumped chunks (nor mmapped
chunks in more general)

(there is some inconsistency here about what
kind of chunks may end up in _int_realloc vs
_int_free, e.g. the former may be tagged and
never mmapped, the latter is always untagged
but may be mmapped, but neither can be dumped.
these constraints are currently not documented)