linux-kernel - [patch] early printk and boot console fixups.

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Date:	Fri, 16 Feb 2007 15:49:23 +0100
From:	Gerd Hoffmann <kraxel@...e.de>
To:	linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: [patch] early printk and boot console fixups.

  Hi,

The console subsystem already has an idea of a boot console, using the
CON_BOOT flag.  The implementation has some flaws though.  The major
problem is that presence of a boot console makes register_console()
ignore any other console devices (unless explicitly specified on the
kernel command line).

This patch fixes the console selection code to *not* consider a boot
console a full-featured one, so the first "normal" console registering
will become the default boot console instead.  This way the unregister
call for the boot console in register_console() actually triggers and
the handover from the boot console to the real console device works
smoothly.

The patch also changes the x86 early_printk code to use this.  The early
console is simply tagged as boot console, the disable_early_printk()
call is gone as it isn't needed any more.

cheers,
  Gerd

-- 
Gerd Hoffmann <kraxel@...e.de>

View attachment "early-printk-boot-console.patch" of type "text/x-patch" (3692 bytes)