[REGRESSION] (build) kallsyms.h:21:10: fatal error: execinfo.h: No such file or directory

[Natanael Copa]

Hi!

Commit c104c16073b7 (Kunit to check the longest symbol length)
introduced a regression that causes build to fail on musl libc systems.
The regression has now tickled down to stable releases and is currently
blocking kernel upgrades for Alpine Linux.

There was a fix proposed[1] which has not yet been applied, and Greg
asked us to get the fix (or revert?) in upstream first before handling
it for stable[2].

Since it appears to take some time to get this fixed, I wonder if
we can revert commit c104c16073b7 (Kunit to check the longest symbol
length) til someone has time to help us work out an acceptable fix?

Thanks!

-nc

[1]: https://lore.kernel.org/stable/DB0OSTC6N4TL.2NK75K2CWE9JV@xxxxxxxxxx/T/#t
[2]: https://lore.kernel.org/stable/2025070104-ether-wipe-9c19@gregkh/