Re: [PATCH] x86: Fix early boot crash on gcc-10, next try

[Arvind Sankar]

On Sat, Apr 25, 2020 at 02:15:49PM -0500, Segher Boessenkool wrote:
> On Sat, Apr 25, 2020 at 08:53:13PM +0200, Borislav Petkov wrote:
> > On Sat, Apr 25, 2020 at 01:37:01PM -0500, Segher Boessenkool wrote:
> > > That is a lot more typing then
> > > 	asm("");
> > 
> > That's why a macro with a hopefully more descriptive name would be
> > telling more than a mere asm("").
> 
> My point is that you should explain at *every use* of this why you cannot
> have tail calls *there*.  This is very unusual, after all.
> 
> There are *very* few places where you want to prevent tail calls, that's
> why there is no attribute for it.
> 
> 
> Segher

Well, there is -fno-optimize-sibling-calls, but we wouldn't be able to
use it via the optimize attribute for the same reason we couldn't use
no-stack-protector.