[PATCH RESEND v2] powerpc: Implement ARCH_HAS_CC_CAN_LINK
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From: Thomas Weißschuh <hidden>
Date: 2026-03-16 15:47:27
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
The generic CC_CAN_LINK detection does not handle different byte orders. This may lead to userprogs which are not actually runnable on the target kernel. Use architecture-specific logic supporting byte orders instead. Signed-off-by: Thomas Weißschuh <redacted> --- Changes in v2: - Rebase on v7.0-rc1. - Link to v1: https://lore.kernel.org/r/20251230-cc-can-link-powerpc-v1-1-82298df6e3bf@linutronix.de (local) --- arch/powerpc/Kconfig | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index ad7a2fe63a2a..793e6b311143 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig@@ -127,6 +127,7 @@ config PPC select ARCH_DMA_DEFAULT_COHERENT if !NOT_COHERENT_CACHE select ARCH_ENABLE_MEMORY_HOTPLUG select ARCH_ENABLE_MEMORY_HOTREMOVE + select ARCH_HAS_CC_CAN_LINK select ARCH_HAS_COPY_MC if PPC64 select ARCH_HAS_CURRENT_STACK_POINTER select ARCH_HAS_DEBUG_VIRTUAL
@@ -1343,6 +1344,20 @@ endif config PPC_LIB_RHEAP bool +config ARCH_CC_CAN_LINK + bool + default $(cc_can_link_user,$(m64-flag) -mlittle-endian) if 64BIT && CPU_LITTLE_ENDIAN + default $(cc_can_link_user,$(m64-flag) -mbig-endian) if 64BIT && CPU_BIG_ENDIAN + default $(cc_can_link_user,$(m32-flag) -mlittle-endian) if CPU_LITTLE_ENDIAN + default $(cc_can_link_user,$(m32-flag) -mbig-endian) if CPU_BIG_ENDIAN + +config ARCH_USERFLAGS + string + default "$(m64-flag) -mlittle-endian" if 64BIT && CPU_LITTLE_ENDIAN + default "$(m64-flag) -mbig-endian" if 64BIT && CPU_BIG_ENDIAN + default "$(m32-flag) -mlittle-endian" if CPU_LITTLE_ENDIAN + default "$(m32-flag) -mbig-endian" if CPU_BIG_ENDIAN + source "arch/powerpc/kvm/Kconfig" source "kernel/livepatch/Kconfig"
--- base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f change-id: 20251222-cc-can-link-powerpc-5ddd2469fd5b Best regards, -- Thomas Weißschuh [off-list ref]