Re: [PATCH][RESEND] x86: Do not write to VGA memory space if CONFIG_VGA_CONSOLEis undefined

From: H. Peter Anvin
Date: Mon Apr 05 2010 - 17:15:39 EST

On 04/05/2010 02:11 PM, H. Peter Anvin wrote:
> On 04/05/2010 02:04 PM, Guenter Roeck wrote:
>> Would you accept a minimized patch like this ?
>> /* Direct interface for emergencies */
>> static struct console *early_console = &early_vga_console;
>> +#else
>> +static struct console *early_console = &early_serial_console;
>> +#endif
>> static int __initdata early_console_initialized;
>> This would prevent the problem while minimizing changes, and at the same
>> time permit early messages to be written to the serial console.
> I'm unhappy about it, because *those early messages shouldn't exist in
> the first place*. It seems to be an indication that we're invoking
> setup_early_printk() too late. The whole playing around with max_xpos
> and max_ypos instead of using boot_params.screen_info directly is
> particularly bleacherous.
> I would at least like to see if the improper invocation of
> early_printk() can be avoided.

Specifically: is this anything other than "Kernel alive\n"?

If it's just "Kernel alive\n" I say drop it on the floor.

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