On Tue, Feb 20, 2018 at 10:59:47PM +0100, Arnd Bergmann wrote: > Hi Nico, all, > > I was playing with ARM link-time optimization handling earlier this > month, and eventually got it to build cleanly with randconfig kernels, > but ended up with a lot of ugly hacks to actually pull it off.
How are we dealing with the fact that LTO can break RCU in very subtle and scary ways? Do we have a compiler guy on board that has given us a compiler switch that kills that optimization (and thereby guarantees that behaviour for future compilers etc..) ? Also see the thread here: https://lkml.kernel.org/r/[email protected] (and yes, this is a fine example of how lore sucks for reading email)
