* Yang Shi | 2015-12-14 15:06:44 [-0800]:
Mainline kernel commit 959274753857efe9c5f1ba35fe727f51e9aa128d ("x86, traps: Track entry into and exit from IST context"), introduced ist_enter which disables preemption uncondiontionally for both x86-64 and x86-32. However, x86-32 does not have an IST and the stack still belongs to the current task and there is no problem in scheduling out the task.
no no. So from a quick look I *assumed* you merged your v1 and revert of the Steven's patch into one piece. But now I see that you don't disable preemption 64bit which means you revert upstream change.
Here is what happens: - I drop your v2 - I merge your v1 with updated patch description - I revert "x86: Do not disable preemption in int3 on 32bit". If someone wants to skip the delayed signal on 32bit please address this upstream first (that is skip the preempt_disable() on 32bit if it is not required there). - Yang Shi, please send a changelong if you send incremental patches.
Sebastian