[PATCH 0/2] xen/list: some fixes in list.h

[Juergen Gross <jgross@xxxxxxxx>]

Patch 1 is a fix for an undefined behavior reported by Andrew. I think
this patch should be considered for 4.20.

Patch 2 is fixing wrong comments in list.h I stumbled over when doing
patch 1. As it is absolutely no risk involved with this patch, I think
it should be 4.20 material, too.

There are some additional cleanups possible in list.h, which I can do
for 4.21 when wanted:

- Removal of list_prepare_entry(), which seems to be unused since
  some time now (and it seems to be thought of as a list.h internal
  macro only).

- More questionable: removal of unused iterators, like e.g.
  list_for_each_entry_continue() or list_for_each_entry_from(). The main
  idea to keep list.h in sync with the Linux version would be violated
  by this removal, though. OTOH with patch 1 they are out of sync anyway
  now, but I'm planning to submit a Linux kernel patch fixing the UB in
  the Linux variant, too.

Juergen Gross (2):
  xen/list: avoid UB in list iterators
  xen/list: fix comments in include/xen/list.h

 xen/include/xen/list.h | 144 +++++++++++++++++++++++++----------------
 1 file changed, 89 insertions(+), 55 deletions(-)

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2.43.0