On Thu, Nov 10, 2022 at 08:36:30PM +0000, Li, Xin3 wrote: > > > > +#pragma GCC diagnostic push > > > > +#pragma GCC diagnostic ignored "-Wcast-function-type" > > > > > > How does this not break CFI ? > > > > I wasn't aware of it, will check. > > CFI needs $(cc-option,-fsanitize=kcfi), which, reported on LWN on Jun, 2002, > had not yet landed in the LLVM mainline (I'm using GCC). So looks we are > replying on people keeping an eye on it to make sure it's not broken? We're relying on that warning you disabled. > Even we are unable to test it now, we should find a solution. You can test this just fine. Build llvm.git and compile a kernel with CFI_CLANG=y. This is not hard, my ADL runs such a kernel as we speak.
