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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2023-10-19 11:46:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-20 11:52:07 +0100 |
| commit | 693baca82d20af6039cd22d4fdef1de2a54c7a92 (patch) | |
| tree | 7121c5eff042a782e1eb01d82055d3446ba8f25d /arch/sh/Kconfig.debug | |
| parent | 35ac8075aea272248374a9dcaddd9d2f7c8a8d1c (diff) | |
| download | linux-stable-693baca82d20af6039cd22d4fdef1de2a54c7a92.tar.gz linux-stable-693baca82d20af6039cd22d4fdef1de2a54c7a92.tar.bz2 linux-stable-693baca82d20af6039cd22d4fdef1de2a54c7a92.zip | |
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
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@glider.be>
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/c40972dfec3dcc6719808d5df388857360262878.1697708489.git.geert+renesas@glider.be
Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/sh/Kconfig.debug')
| -rw-r--r-- | arch/sh/Kconfig.debug | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug index c449e7c1b20f..8bcd6c1431a9 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 |