So this is something we have in kGraft for a while (though the actual implementation in s390's entry.S differs). The first patch is needed because we want our TIF flag to be part of _TIF_WORK and s390's tm instruction tests only 8-bits. The second patch adds a call to klp_update_task_universe() to entry.S. Specifically to syscall and interrupt return paths. WARNING: It is only compile-tested. It even cannot be linked, because klp_update_task_universe() is static inline. Josh, you're gonna change this part anyway to remove TIF_KLP_NEED_UPDATE from arch-independent code, aren't you? Comments are obviously welcome. s390 maintainters not CC'ed yet. Jiri Slaby (1): s390: livepatch, reorganize TIF bits Miroslav Benes (1): s390/klp: update task universe when exiting kernel arch/s390/include/asm/thread_info.h | 24 ++++++++++++++++-------- arch/s390/kernel/entry.S | 31 ++++++++++++++++++++++++++++++- 2 files changed, 46 insertions(+), 9 deletions(-) -- 2.8.1 -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
