On Wed, Oct 23, 2024 at 02:31:27AM +0000, Matthew Maurer wrote:

This patch series is intended for use alongside the Implement DWARF
modversions series [1] to enable RUST and MODVERSIONS at the same
time.

Elsewhere, we've seen a desire for long symbol name support for LTO
symbol names [2], and the previous series came up [3] as a possible
solution rather than hashing, which some have objected [4] to.

This series adds a MODVERSIONS format which uses a section per column.
This avoids userspace tools breaking if we need to make a similar change
to the format in the future - we would do so by adding a new section,
rather than editing the struct definition. In the new format, the name
section is formatted as a concatenated sequence of NUL-terminated
strings, which allows for arbitrary length names.

Emitting the extended format is guarded by CONFIG_EXTENDED_MODVERSIONS,
but the kernel always knows how to validate both the original and
extended formats.

Selecting RUST and MODVERSIONS is now possible if GENDWARFKSYMS is
selected, and will implicitly select EXTENDED_MODVERSIONS.

This series depends upon the module verification refactor patches [5]
that were split off of v5, and DWARF-based versions [1].

linuxppc-dev is requested to look at the ppc-specific munging,
as Luis would like some eyes on there [6].

[1] https://lore.kernel.org/lkml/20241008183823.36676-21-samitolvanen@google.com/ (local)
[2] https://lore.kernel.org/lkml/20240605032120.3179157-1-song@kernel.org/ (local)
[3] https://lore.kernel.org/lkml/ZoxbEEsK40ASi1cY@bombadil.infradead.org/ (local)
[4] https://lore.kernel.org/lkml/0b2697fd-7ab4-469f-83a6-ec9ebc701ba0@suse.com/ (local)
[5] https://lore.kernel.org/linux-modules/20241015231651.3851138-1-mmaurer@google.com/T/#t (local)
[6] https://lore.kernel.org/lkml/ZxahDv5ZKdM__0sZ@bombadil.infradead.org/ (local)

Changes in v7:
- Fix modpost to detect EXTENDED_MODVERSIONS based on a flag
- Drop patches to fix export_report.pl

Unless Luis prefers to deal with this separately, perhaps you can
just include a patch to delete export_report.pl in this series?

Sami