No, because (as the commit message notes) gcc does not support output constraints on asm goto, so the kernel can't be using this feature at the moment. (Indeed,

No, because (as the commit message notes) gcc does not support output constraints on asm goto, so the kernel can't be using this feature at the moment. (Indeed, nothing can be...) On the other hand, Torvalds has mentioned in the past (https://lkml.org/lkml/2018/2/14/656 https://lkml.org/lkml/2018/2/14/656) that asm-goto with outputs would be nice to have and that if clang supported this he'd like to see it in gcc too...