On Sun, Aug 30, 2020 at 11:54:19AM -0700, Linus Torvalds wrote: > On Sun, Aug 30, 2020 at 11:04 AM Thomas Gleixner <[email protected]> wrote: > > > > - Make is_idle_task() __always_inline to prevent the compiler from putting > > it out of line into the wrong section because it's used inside noinstr > > sections. > > What completely broken compiler uninlined that single-instruction function? > > I've obviously pulled this, but it sounds like there should be a > compiler bug-report for this insane behavior. > > Or is Marco building the kernel without optimizations or something > like that? That has not been a supported model, for various good > reasons..
I think that was Clang with KCSAN on, KCSAN obviously makes this function a little bigger with the instrumentation for the load(s). But yes...
