Re: [PATCH v23 6/9] x86/entry: Introduce ENDBR macro

[Yu, Yu-cheng]

On 3/16/2021 12:57 PM, Peter Zijlstra wrote:
> On Tue, Mar 16, 2021 at 10:12:39AM -0700, Yu, Yu-cheng wrote:
> > Alternatively, there is another compiler-defined macro _CET_ENDBR that can
> > be used.  We can put the following in calling.h:
> >
> > #ifdef __CET__
> > #include <cet.h>
> > #else
> > #define _CET_ENDBR
> > #endif
> >
> > and then use _CET_ENDBR in other files.  How is that?
> >
> > In the future, in case we have kernel-mode IBT, ENDBR macros are also needed
> > for other assembly files.
>
> Can we please call it IBT_ENDBR or just ENDBR. CET is a horrible name,
> seeing how it is not specific.

_CET_ENDBR is from the compiler and we cannot change it.  We can do:

#define ENDBR _CET_ENDBR

How is that?