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authorGerd Hoffmann <kraxel@suse.de>2007-05-08 00:26:49 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:04 -0700
commit69331af79cf29e26d1231152a172a1a10c2df511 (patch)
tree0c6f805fc78c1969b8c46f02070cb9dc39f3f944 /arch/alpha
parentenlarge console.name (diff)
downloadlinux-dev-69331af79cf29e26d1231152a172a1a10c2df511.tar.xz
linux-dev-69331af79cf29e26d1231152a172a1a10c2df511.zip
Fixes and cleanups for earlyprintk aka boot console
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 non-boot console registering will become the default console instead. This way the unregister call for the boot console in the register_console() function actually triggers and the handover from the boot console to the real console device works smoothly. Added a printk for the handover, so you know which console device the output goes to when the boot console stops printing messages. The disable_early_printk() call is obsolete with that patch, explicitly disabling the early console isn't needed any more as it works automagically with that patch. I've walked through the tree, dropped all disable_early_printk() instances found below arch/ and tagged the consoles with CON_BOOT if needed. The code is tested on x86, sh (thanks to Paul) and mips (thanks to Ralf). Changes to last version: Rediffed against -rc3, adapted to mips cleanups by Ralf, fixed "udbg-immortal" cmd line arg on powerpc. Signed-off-by: Gerd Hoffmann <kraxel@exsuse.de> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Andi Kleen <ak@suse.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/alpha')
-rw-r--r--arch/alpha/kernel/setup.c9
-rw-r--r--arch/alpha/kernel/srmcons.c2
2 files changed, 1 insertions, 10 deletions
diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c
index d352c2b05f1a..915f26345c45 100644
--- a/arch/alpha/kernel/setup.c
+++ b/arch/alpha/kernel/setup.c
@@ -744,15 +744,6 @@ setup_arch(char **cmdline_p)
paging_init();
}
-void __init
-disable_early_printk(void)
-{
- if (alpha_using_srm && srmcons_output) {
- unregister_srm_console();
- srmcons_output = 0;
- }
-}
-
static char sys_unknown[] = "Unknown";
static char systype_names[][16] = {
"0",
diff --git a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c
index 85a821aaceb4..930cedc8be24 100644
--- a/arch/alpha/kernel/srmcons.c
+++ b/arch/alpha/kernel/srmcons.c
@@ -300,7 +300,7 @@ static struct console srmcons = {
.write = srm_console_write,
.device = srm_console_device,
.setup = srm_console_setup,
- .flags = CON_PRINTBUFFER,
+ .flags = CON_PRINTBUFFER | CON_BOOT,
.index = -1,
};