On Tue, Aug 30, 2022 at 02:42:04PM +0300, Martin-Éric Racine wrote: > Greetings, > > On Fri, Aug 19, 2022 at 3:15 PM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > > > On Fri, Aug 19, 2022 at 01:38:27PM +0200, Ben Hutchings wrote: > > > > > So that puts the whole __FILL_RETURN_BUFFER inside an alternative, and > > > we can't have nested alternatives. That's unfortunate. > > > > Well, both alternatives end with the LFENCE instruction, so I could pull > > it out and do two consequtive ALTs, but unrolling the loop for i386 is > > a better solution in that the sequence, while larger, removes the need > > for the LFENCE. > > Have we reached a definitive conclusion on to how to fix this? https://git.kernel.org/tip/332924973725e8cdcc783c175f68cf7e162cb9e5
