linux-kernel - [PATCH 05/11] arm64: Kconfig: Clean up tautological LLVM version checks

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Date: Thu, 25 Jan 2024 15:55:11 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: akpm@...ux-foundation.org, masahiroy@...nel.org
Cc: nicolas@...sle.eu, linux-kbuild@...r.kernel.org, llvm@...ts.linux.dev, 
 patches@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 Nathan Chancellor <nathan@...nel.org>, catalin.marinas@....com, 
 will@...nel.org, mark.rutland@....com, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 05/11] arm64: Kconfig: Clean up tautological LLVM version
 checks

Now that the minimum supported version of LLVM for building the kernel
has been bumped to 13.0.1, several conditions become tautologies, as
they will always be true because the build will fail during the
configuration stage for older LLVM versions. Drop them, as they are
unnecessary.

Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
Cc: catalin.marinas@....com
Cc: will@...nel.org
Cc: mark.rutland@....com
Cc: linux-arm-kernel@...ts.infradead.org
---
 arch/arm64/Kconfig | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 5a8acca4dbf4..cb34e7d780c0 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -383,7 +383,7 @@ config BUILTIN_RETURN_ADDRESS_STRIPS_PAC
 	bool
 	# Clang's __builtin_return_adddress() strips the PAC since 12.0.0
 	# https://github.com/llvm/llvm-project/commit/2a96f47c5ffca84cd774ad402cacd137f4bf45e2
-	default y if CC_IS_CLANG && (CLANG_VERSION >= 120000)
+	default y if CC_IS_CLANG
 	# GCC's __builtin_return_address() strips the PAC since 11.1.0,
 	# and this was backported to 10.2.0, 9.4.0, 8.5.0, but not earlier
 	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94891
@@ -1387,7 +1387,6 @@ choice
 
 config CPU_BIG_ENDIAN
 	bool "Build big-endian kernel"
-	depends on !LD_IS_LLD || LLD_VERSION >= 130000
 	# https://github.com/llvm/llvm-project/commit/1379b150991f70a5782e9a143c2ba5308da1161c
 	depends on AS_IS_GNU || AS_VERSION >= 150000
 	help
@@ -2018,8 +2017,6 @@ config ARM64_BTI_KERNEL
 	depends on !CC_IS_GCC || GCC_VERSION >= 100100
 	# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106671
 	depends on !CC_IS_GCC
-	# https://github.com/llvm/llvm-project/commit/a88c722e687e6780dcd6a58718350dc76fcc4cc9
-	depends on !CC_IS_CLANG || CLANG_VERSION >= 120000
 	depends on (!FUNCTION_GRAPH_TRACER || DYNAMIC_FTRACE_WITH_ARGS)
 	help
 	  Build the kernel with Branch Target Identification annotations

-- 
2.43.0