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authorHelge Deller <deller@gmx.de>2022-09-13 09:51:10 +0300
committerHelge Deller <deller@gmx.de>2022-09-15 08:59:37 +0300
commit805ce8614958c925877ba6b6dc26cdf9f8800474 (patch)
tree3969bbf8028f355dc280273c160b4fc4a98007bb /arch/parisc
parente359b70cc1c51138e166bd4a560e5c5995369a99 (diff)
downloadlinux-805ce8614958c925877ba6b6dc26cdf9f8800474.tar.xz
parisc: Allow CONFIG_64BIT with ARCH=parisc
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@gmx.de> Cc: <stable@vger.kernel.org> # 5.15+
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/Kconfig12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 9aede2447011..a98940e64243 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -224,8 +224,18 @@ 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"