There are situations when it might make sense to combine livepatches with and without the atomic replace on the same system. For example, the livepatch without the atomic replace might provide a hotfix or extra tuning. Managing livepatches on such systems might be challenging. And the information which of the installed livepatches do not use the atomic replace would be useful. Therefore, "replace" sysfs attribute is added to show whether a livepatch supports atomic replace or not. A minor cleanup is also included in this patchset. v2->v3: - Improve the commit log (Petr) v1->v2: https://lore.kernel.org/live-patching/20240610013237.92646-1-laoar.shao@xxxxxxxxx/ - Refine the subject (Miroslav) - Use sysfs_emit() instead and replace other snprintf() as well (Miroslav) - Add selftests (Marcos) v1: https://lore.kernel.org/live-patching/20240607070157.33828-1-laoar.shao@xxxxxxxxx/ Yafang Shao (3): livepatch: Add "replace" sysfs attribute selftests/livepatch: Add selftests for "replace" sysfs attribute livepatch: Replace snprintf() with sysfs_emit() .../ABI/testing/sysfs-kernel-livepatch | 8 ++++ kernel/livepatch/core.c | 17 +++++-- .../testing/selftests/livepatch/test-sysfs.sh | 48 +++++++++++++++++++ 3 files changed, 70 insertions(+), 3 deletions(-) -- 2.39.1
