[PATCH 1/3] lib: early_string: allow early usage of some string functions

[Daniel Walker]

On Mon, May 03, 2021 at 11:01:41AM -0700, Daniel Walker wrote:
> On Sat, May 01, 2021 at 09:31:47AM +0200, Christophe Leroy wrote:
> > 
> > > In fact, should be like in prom_init today:
> > > 
> > > #ifdef __EARLY_STRING_ENABLED
> > >      if (dsize >= count)
> > >          return count;
> > > #else
> > >      BUG_ON(dsize >= count);
> > > #endif
> > 
> > Thinking about it once more, this BUG_ON() is overkill and should be
> > avoided, see https://www.kernel.org/doc/html/latest/process/deprecated.html
> > 
> > Therefore, something like the following would make it:
> > 
> > 	if (dsize >= count) {
> > 		WARN_ON(!__is_defined(__EARLY_STRING_ENABLED));
> > 
> > 		return count;
> > 	}
> 
> I agree, it's overkill it stop the system for this condition.
> 
> how about I do something more like this for my changes,
> 
> 
> > 	if (WARN_ON(dsize >= count && !__is_defined(__EARLY_STRING_ENABLED)))
> > 		return count;

I'll have to work on this one..

Daniel