Re: [PATCH v4 06/15] ftrace: Use an opaque type for functions not callable from C

Steven Rostedt
2021-10-06T16:58:14Z

On Wed, 6 Oct 2021 09:31:04 -0700
Sami Tolvanen <samitolvanen@google.com> wrote:

> > > On Thu, Sep 30, 2021 at 11:05:22AM -0700, Sami Tolvanen wrote:
> > > > With CONFIG_CFI_CLANG, the compiler changes function references to point
> > > > to the CFI jump table. As ftrace_call, ftrace_regs_call, and mcount_call
> > > > are not called from C, use DECLARE_ASM_FUNC_SYMBOL to declare them.
> >
> > "not called from C" is a bit confusing.
>
> Any thoughts on how to make this less confusing?

"Not called by C code, but injected by the compiler."

?

-- Steve