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Setting boot verbosity in the kernel config
In an embedded or customer-facing product, we don't want the kernel
autoconf messages welcoming them. That's what boot -z is aim at. Due to
incomplete aprint_* conversion, it's currently less than successful, but
that's not my problem here (I use a local hack that basically makes
printf() a copy of aprint_normal()).
I want to be able to set the boot verbosity in the kernel configuration
and not have to hack the bootloader to pass the appropriate boot flags.
I also want the option to go back to normal or verbose mode from the
bootloader if I wish.
So I've created a patch which provides something like:
The option is ORed with boothowto. It adds a AB_FORCENORMAL flag too which
clears boothowto first. This can be used in both the kernel config and
access with a new -n flag in the boot loader.
This means you can use BOOT_VERBOSITY="AB_SILENT" and then go back to
normal with boot -n. Or if you want to stop the bootloader overriding it
at all you can use BOOT_VERBOSITY="AB_SILENT|AB_FORCENORMAL".
The patch is here:
It's incomplete in that I've not updated the usage() text in the various
bootloaders that use it to reflect the new flag.
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