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[ Upstream commita74b6c0e53] In order to work around the existence of a vmap symbol in libpcap, the UML makefile unconditionally redefines vmap to kernel_vmap. However, this not only affects the actual vmap symbol, but also anything else named vmap, including a number of struct members in DRM. This would not be too much of a problem, since all uses are also updated, except we now have Rust DRM bindings, which expect the corresponding Rust structs to have 'vmap' names. Since the redefinition applies in bindgen, but not to Rust code, we end up with errors such as: error[E0560]: struct `drm_gem_object_funcs` has no fields named `vmap` --> rust/kernel/drm/gem/mod.rs:210:9 Since libpcap support was removed in commit12b8e7e69a("um: Remove obsolete pcap driver"), remove the, now unnecessary, define as well. We also take this opportunity to update the comment. Signed-off-by: David Gow <davidgow@google.com> Acked-by: Miguel Ojeda <ojeda@kernel.org> Link: https://patch.msgid.link/20251122083213.3996586-1-davidgow@google.com Fixes:12b8e7e69a("um: Remove obsolete pcap driver") [adjust commmit message a bit] Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>