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.klp.symid records duplicate-named locals so klp diff can work out their
sympos. Symbols in sections the vmlinux link throws away have to be left
out, or the table references symbols which no longer exist and the link
fails:
`__exitcall_foo' referenced in section `.klp.symid' of vmlinux.o:
defined in discarded section `.exitcall.exit' of vmlinux.o
Two translation units are compiled from one fixture and partially linked so
the result has duplicate locals, which symid_needed() requires. One
duplicate is in a live section and one in .exitcall.exit.
Checking the live duplicate as well keeps the test honest: it would
otherwise pass just as happily if symid generation stopped working
entirely.
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Signed-off-by: Song Liu <song@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Assisted-by: Claude:claude-opus-5
Link: https://patch.msgid.link/20260916184351.2720310-23-song@kernel.org
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