On 08/13, Liao, Chang wrote: > > > Oleg, your explaination is more accurate. So I will reword the commit log and > quote some of your note like this: Oh, please don't. I just tried to explain the history of this spin_lock(siglock). > Since we already have the lockless user of clear_thread_flag(TIF_SIGPENDING). > And for uprobe singlestep case, it doesn't break the rule of "the state of > TIF_SIGPENDING of every thread is stable with sighand->siglock held". It obviously does break the rule above. Please keep your changelog as is. Oleg.