Merge branch 'bpf-some-fixes-for-nullness-elision'

Daniel Xu says:

====================
Tow fixes for nullness elision.

Changes from v1:
* Reword commit message in patch 1
* Add tags
====================

Link: https://patch.msgid.link/cover.1738689872.git.dxu@dxuuu.xyz


Signed-off-by: Alexei Starovoitov <ast@kernel.org>