On Thu, 2023-10-19 at 11:46 +0200, Geert Uytterhoeven wrote:
> The SuperH BIOS earlyprintk code is protected by CONFIG_EARLY_PRINTK.
> However, when this protection was added, it was missed that SuperH no
> longer defines an EARLY_PRINTK config symbol since commit
> e76fe57447e88916 ("sh: Remove old early serial console code V2"), so
> BIOS earlyprintk can no longer be used.
>
> Fix this by reviving the EARLY_PRINTK config symbol.
>
> Fixes: d0380e6c3c0f6edb ("early_printk: consolidate random copies of identical code")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
> arch/sh/Kconfig.debug | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug
> index c449e7c1b20ff5b5..8bcd6c1431a95be9 100644
> --- a/arch/sh/Kconfig.debug
> +++ b/arch/sh/Kconfig.debug
> @@ -22,6 +22,17 @@ config STACK_DEBUG
> every function call and will therefore incur a major
> performance hit. Most users should say N.
>
> +config EARLY_PRINTK
> + bool "Early printk"
> + depends on SH_STANDARD_BIOS
> + help
> + Say Y here to redirect kernel printk messages to the serial port
> + used by the SH-IPL bootloader, starting very early in the boot
> + process and ending when the kernel's serial console is initialised.
> + This option is only useful while porting the kernel to a new machine,
> + when the kernel may crash or hang before the serial console is
> + initialised. If unsure, say N.
> +
> config 4KSTACKS
> bool "Use 4Kb for kernel stacks instead of 8Kb"
> depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer
`. `' Physicist
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
