Re: [peterz-queue:core/rcu 31/33] arch/x86/kernel/alternative.c:961:26: error: inlining failed in call to always_inline 'try_get_desc': function attribute mismatch

[Peter Zijlstra <peterz@infradead.org>]

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On Thu, Mar 05, 2020 at 05:29:27PM +0100, Dmitry Vyukov wrote:
> On Thu, Mar 5, 2020 at 4:55 PM Peter Zijlstra <peterz@infradead.org> wrote:
> >
> > On Thu, Mar 05, 2020 at 04:23:11PM +0100, Dmitry Vyukov wrote:
> > > Compilers just don't allow this: asking to inline sanitized function
> > > into a non-sanitized function. But I don't know the ptrace/alternative
> > > code good enough to suggest the right alternative (don't call
> > > user_mode, copy user_mode, or something else).
> >
> > Does it work if we inline into a .c file and build it with:
> >
> >   KASAN_SANITIZE := n
> >   UBSAN_SANITIZE := n
> >   KCOV_INSTRUMENT := n
> >
> > Which would be effectively the very same, just more cumbersome.
> 
> I think it should work, because then user_mode will also not be instrumented.

Right, but then I have to ask how this is different vs inlining things
into a __no_sanitize function.

Anyway, I'll go move code around so we can do this..