Re: [PATCH] BUG preserve registers

Linus Torvalds
2002-02-09T20:04:23Z

On Sat, 9 Feb 2002, H. Peter Anvin wrote:
> >
> > This is all assuming that gcc doesn't create the string for inline
> > functions that aren't used, which it probably cannot, so maybe this
> > doesn't work out.
>
> Since gcc wouldn't even *see* a macro it didn't use, I find it hard to
> imagine it would create anything.

Oh, but I was talking about the case of the macro being used in an "static
inline" in a header file, and that inline is not actually _used_
anywhere..

> However, you really want to do "asm volatile" rather than "asm"...

Without any inputs and outputs, asms default to volatile, but yes, I
agree. Better make it explicit.

Linus