On Tue, Nov 10, 2020 at 02:42:23PM +0100, Frederic Weisbecker wrote:
> On Tue, Nov 10, 2020 at 11:13:07AM +0100, Peter Zijlstra wrote:
> > On Tue, Nov 10, 2020 at 10:55:15AM +0100, Peter Zijlstra wrote:
> > > On Tue, Nov 10, 2020 at 01:56:03AM +0100, Frederic Weisbecker wrote:
> > >
> > > >
On Tue, Nov 10, 2020 at 11:13:07AM +0100, Peter Zijlstra wrote:
> On Tue, Nov 10, 2020 at 10:55:15AM +0100, Peter Zijlstra wrote:
> > On Tue, Nov 10, 2020 at 01:56:03AM +0100, Frederic Weisbecker wrote:
> >
> > > [fweisbec: s/disp16/data16, integrate into text_get_insn(), elaborate
> > > comment
On Tue, Nov 10, 2020 at 10:55:15AM +0100, Peter Zijlstra wrote:
> On Tue, Nov 10, 2020 at 01:56:03AM +0100, Frederic Weisbecker wrote:
> > diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
> > index 2400ad62f330..37592f576a10 100644
> > --- a/arch/x86/kernel/alternative.c
On Tue, Nov 10, 2020 at 10:55:15AM +0100, Peter Zijlstra wrote:
> On Tue, Nov 10, 2020 at 01:56:03AM +0100, Frederic Weisbecker wrote:
>
> > [fweisbec: s/disp16/data16, integrate into text_get_insn(), elaborate
> > comment on the resulting insn, emulate on int3 trap, provide validation,
> >
On Tue, Nov 10, 2020 at 01:56:03AM +0100, Frederic Weisbecker wrote:
> diff --git a/include/linux/static_call.h b/include/linux/static_call.h
> index 695da4c9b338..055544793430 100644
> --- a/include/linux/static_call.h
> +++ b/include/linux/static_call.h
> @@ -136,6 +136,9 @@ extern void
On Tue, Nov 10, 2020 at 01:56:03AM +0100, Frederic Weisbecker wrote:
> [fweisbec: s/disp16/data16, integrate into text_get_insn(), elaborate
> comment on the resulting insn, emulate on int3 trap, provide validation,
> uninline __static_call_return0() for HAVE_STATIC_CALL]
> diff --git
From: Peter Zijlstra
Provide a stub function that return 0 and wire up the static call site
patching to replace the CALL with a single 5 byte instruction that
clears %RAX, the return value register.
The function can be cast to any function pointer type that has a
single %RAX return (including
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