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Commit 66888e69 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Greg Kroah-Hartman
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sh: bios: Revive earlyprintk support 



[ Upstream commit 553f7ac78fbb41b2c93ab9b9d78e42274d27daa9 ]

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
e76fe574 ("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: d0380e6c ("early_printk: consolidate random copies of identical code")
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarJohn Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/c40972dfec3dcc6719808d5df388857360262878.1697708489.git.geert+renesas@glider.be


Signed-off-by: default avatarJohn Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent fdcbe9ce

arch/sh/Kconfig.debug

+11 −0
Original line number Diff line number Diff line
@@ -26,6 +26,17 @@ 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