I was debugging an issue that a livepatch appears to be attached, but actually not. It turns out that there is a mismatch in module name (abc-xyz vs. abc_xyz), klp_find_object_module failed to find the module. Changes v1 => v2: 1. Add selftest. (Petr Mladek) 2. Update documentation. (Petr Mladek) 3. Use sysfs_emit. (Petr Mladek) Song Liu (2): livepatch: add sysfs entry "patched" for each klp_object selftests/livepatch: add sysfs test .../ABI/testing/sysfs-kernel-livepatch | 8 ++++ kernel/livepatch/core.c | 18 +++++++++ tools/testing/selftests/livepatch/Makefile | 3 +- .../testing/selftests/livepatch/test-sysfs.sh | 40 +++++++++++++++++++ 4 files changed, 68 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/livepatch/test-sysfs.sh -- 2.30.2