69331af79c
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 The disable_early_printk() call is obsolete with that patch, explicitly disabling the early console isn't needed any more as it works automagically with that patch.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> |
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.. | ||
acpi | ||
cpufreq | ||
aperture.c | ||
apic.c | ||
asm-offsets.c | ||
audit.c | ||
bugs.c | ||
crash.c | ||
crash_dump.c | ||
e820.c | ||
early-quirks.c | ||
early_printk.c | ||
entry.S | ||
genapic.c | ||
genapic_flat.c | ||
head.S | ||
head64.c | ||
hpet.c | ||
i387.c | ||
i8259.c | ||
init_task.c | ||
io_apic.c | ||
ioport.c | ||
irq.c | ||
k8.c | ||
kprobes.c | ||
ldt.c | ||
machine_kexec.c | ||
Makefile | ||
mce.c | ||
mce_amd.c | ||
mce_intel.c | ||
module.c | ||
mpparse.c | ||
nmi.c | ||
pci-calgary.c | ||
pci-dma.c | ||
pci-gart.c | ||
pci-nommu.c | ||
pci-swiotlb.c | ||
pmtimer.c | ||
process.c | ||
ptrace.c | ||
reboot.c | ||
relocate_kernel.S | ||
setup.c | ||
setup64.c | ||
signal.c | ||
smp.c | ||
smpboot.c | ||
stacktrace.c | ||
suspend.c | ||
suspend_asm.S | ||
sys_x86_64.c | ||
syscall.c | ||
tce.c | ||
time.c | ||
trampoline.S | ||
traps.c | ||
tsc.c | ||
tsc_sync.c | ||
verify_cpu.S | ||
vmlinux.lds.S | ||
vsmp.c | ||
vsyscall.c | ||
x8664_ksyms.c |