https://bugs.kde.org/show_bug.cgi?id=369459
--- Comment #14 from Peter Maydell <peter.mayd...@linaro.org> --- I think the assertion about "real world code not caring" is based on some popular CPUs not having an ll/sc combination (like x86!), and so portable atomicity primitives can't assume you don't get ABA because they have to work with a lowest-common-denominator cmpxchg CPU. I think your suggestion in comment 11 about trying to autodetect this kind of core sounds extremely fragile. The architecture says "don't do this", and implementations can take advantage, including perhaps being able to make forward progress in some cases even if not in others, so you might find your autodetect test code passed but later generated code didn't. Plus on big.LITTLE you might later be running on a CPU with a different microarchitecture from the one you ran your autodetection on... -- You are receiving this mail because: You are watching all bug changes.
