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s390: Implement ARCH_HAS_CC_CAN_LINK

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The generic CC_CAN_LINK detection relies on -m32/-m64 compiler flags.
Some s390 toolchains use -m31 instead but that is not supported in the
kernel.

Make the logic easier to understand and allow the simplification of the
generic CC_CAN_LINK by using a tailored implementation.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Thomas Weißschuh
2025-12-22 09:28:17 +01:00
committed by Heiko Carstens
parent 71f9bc6f7c
commit eb2606bba1
1 changed files with 9 additions and 0 deletions
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9
arch/s390/Kconfig
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@@ -85,6 +85,7 @@ config S390
select ARCH_ENABLE_MEMORY_HOTREMOVE
select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
select ARCH_HAS_CC_CAN_LINK
select ARCH_HAS_CPU_FINALIZE_INIT
select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DEBUG_VIRTUAL
@@ -294,6 +295,14 @@ config PGTABLE_LEVELS
source "kernel/livepatch/Kconfig"
config ARCH_CC_CAN_LINK
bool
default $(cc_can_link_user,-m64)
config ARCH_USERFLAGS
string
default "-m64"
config ARCH_SUPPORTS_KEXEC
def_bool y