[PATCH v2 05/10] s390: Implement custom CC_CAN_LINK

[Thomas Weißschuh]

The generic CC_CAN_LINK detection relies on -m32/-m64 compiler flags.
s390 uses -m31 instead of -m32.

Use architecture-specific logic using -m31/-m64 instead.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh at linutronix.de>
---
 arch/s390/Kconfig | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index c4145672ca342a656eece10704706d4b12ff9fd6..77ea17537fa2f938aee1fce0053a48853b1ce638 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -82,6 +82,7 @@ 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
@@ -290,6 +291,16 @@ config PGTABLE_LEVELS
 
 source "kernel/livepatch/Kconfig"
 
+config ARCH_CC_CAN_LINK
+	bool
+	default $(cc_can_link_user,-m64) if 64BIT
+	default $(cc_can_link_user,-m31)
+
+config ARCH_USERFLAGS
+	string
+	default "-m64" if 64BIT
+	default "-m31"
+
 config ARCH_SUPPORTS_KEXEC
 	def_bool y
 

-- 
2.51.0