Re: [PATCH] allow console drivers to be called early

[Andrew Morton <akpm@osdl.org>]

Jesse Barnes <jbarnes@engr.sgi.com> wrote:
>
> This is a simple patch to allow arches to set early_printk_ok if they've 
>  registered console drivers that support early operation.  I've got an ia64 
>  specific bit and an sn2 specific bit that I can post for reference if 
>  anyone's interested, but they're pretty straightforward, so I'm just posting 
>  this for comments.  The ia64 one just adds a register_early_consoles() 
>  function to the ia64 code that gets called early on in setup_arch.  All it 
>  does is call the init routines of console drivers that are setup to do early 
>  printks.
>
> ...
>    * console_sem protects the console_drivers list, and also
>  @@ -526,7 +527,7 @@
>   			log_level_unknown = 1;
>   	}
>   
>  -	if (!cpu_online(smp_processor_id()) &&
>  +	if (!early_printk_ok && !cpu_online(smp_processor_id()) &&

Is it not possible to mark this cpu as being online?   It sure seems to be.