Kevin Cernekee <cernekee@xxxxxxxxx> writes:
On Wed, Dec 17, 2014 at 12:58 PM, Joe Perches <joe@xxxxxxxxxxx> wrote:
It seems like early_printk can be configured into
a few architectures but also appear not to be used.
$ git grep -w "early_printk"
[snip]
arch/mips/kernel/Makefile:obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
Nowadays I try to use OF_EARLYCON whenever possible, but when that has
been unavailable, I have used arch/mips/kernel/early_printk.c to get
console output before the serial driver is initialized. It runs very
early in the boot sequence and has very few dependencies, which makes
it useful for board bringup.
EARLY_PRINTK on MIPS is enabled just after prom_init(), well before
OF_EARLYCON is usable. I'd prefer if it stayed that way.
--
Måns Rullgård
mans@xxxxxxxxx
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