This is a note to let you know that I've just added the patch titled
parisc: Allow CONFIG_64BIT with ARCH=parisc
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
parisc-allow-config_64bit-with-arch-parisc.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 805ce8614958c925877ba6b6dc26cdf9f8800474 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@xxxxxx>
Date: Tue, 13 Sep 2022 08:51:10 +0200
Subject: parisc: Allow CONFIG_64BIT with ARCH=parisc
From: Helge Deller <deller@xxxxxx>
commit 805ce8614958c925877ba6b6dc26cdf9f8800474 upstream.
The previous patch triggered a build failure for the debian kernel,
which has CONFIG_64BIT enabled, uses the CROSS_COMPILER environment
variable and uses ARCH=parisc to configure the kernel for 64-bit
support.
This patch weakens the previous patch while keeping the recommended way
to configure the kernel with:
ARCH=parisc -> build 32-bit kernel
ARCH=parisc64 -> build 64-bit kernel
while adding the possibility for debian to configure a 64-bit kernel
even if ARCH=parisc is set (PA8X00 CPU has to be selected and
CONFIG_64BIT needs to be enabled).
The downside of this patch is, that we now have a small window open
again where people may get it wrong: if they enable CONFIG_64BIT and try
to compile with a 32-bit compiler.
Fixes: 3dcfb729b5f4 ("parisc: Make CONFIG_64BIT available for ARCH=parisc64 only")
Signed-off-by: Helge Deller <deller@xxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 5.15+
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/parisc/Kconfig | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -220,8 +220,18 @@ config MLONGCALLS
Enabling this option will probably slow down your kernel.
config 64BIT
- def_bool "$(ARCH)" = "parisc64"
+ def_bool y if "$(ARCH)" = "parisc64"
+ bool "64-bit kernel" if "$(ARCH)" = "parisc"
depends on PA8X00
+ help
+ Enable this if you want to support 64bit kernel on PA-RISC platform.
+
+ At the moment, only people willing to use more than 2GB of RAM,
+ or having a 64bit-only capable PA-RISC machine should say Y here.
+
+ Since there is no 64bit userland on PA-RISC, there is no point to
+ enable this option otherwise. The 64bit kernel is significantly bigger
+ and slower than the 32bit one.
choice
prompt "Kernel page size"
Patches currently in stable-queue which might be from deller@xxxxxx are
queue-5.15/parisc-ccio-dma-add-missing-iounmap-in-error-path-in.patch
queue-5.15/tools-include-uapi-fix-asm-errno.h-for-parisc-and-xtensa.patch
queue-5.15/parisc-allow-config_64bit-with-arch-parisc.patch
