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ftrace/selftests: Change non-unique test symbol to init_once

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The name_show symbol is not the best choise, because it often
appears only three times on s390 in kallsyms, with two of them
having module annotations [mdev] and [i2c_core].

Switch to init_once which has many more duplicate instances
all in vmlinux, making it a more reliable non-unique symbol
for testing kprobe registration failure.

Link: https://lore.kernel.org/all/67ac21cd214ec9371276df9ba790e9832cf328d4.1787670777.git.agordeev@linux.ibm.com/

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
This commit is contained in:
Alexander Gordeev 2026-08-25 18:58:40 +02:00 committed by Masami Hiramatsu (Google)
parent 3ccfe2a1a8
commit d4d028a7ae
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/ftrace/test.d/kprobe/kprobe_non_uniq_symbol.tc
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@ -3,7 +3,7 @@
# description: Test failure of registering kprobe on non unique symbol
# requires: kprobe_events
SYMBOL='name_show'
SYMBOL='init_once'
# We skip this test on kernel where SYMBOL is unique or does not exist.
if [ "$(grep -c -E "[[:alnum:]]+ t ${SYMBOL}$" /proc/kallsyms)" -le '1' ]; then