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From: Nathan Chancellor <nathan@kernel.org>
To: akpm@linux-foundation.org, masahiroy@kernel.org
Cc: nicolas@fjasle.eu, linux-kbuild@vger.kernel.org,
	llvm@lists.linux.dev,  patches@lists.linux.dev,
	linux-kernel@vger.kernel.org,
	 Nathan Chancellor <nathan@kernel.org>,
	catalin.marinas@arm.com,  will@kernel.org, mark.rutland@arm.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 05/11] arm64: Kconfig: Clean up tautological LLVM version checks
Date: Thu, 25 Jan 2024 15:55:11 -0700	[thread overview]
Message-ID: <20240125-bump-min-llvm-ver-to-13-0-1-v1-5-f5ff9bda41c5@kernel.org> (raw)
In-Reply-To: <20240125-bump-min-llvm-ver-to-13-0-1-v1-0-f5ff9bda41c5@kernel.org>

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@kernel.org>
---
Cc: catalin.marinas@arm.com
Cc: will@kernel.org
Cc: mark.rutland@arm.com
Cc: linux-arm-kernel@lists.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


WARNING: multiple messages have this Message-ID (diff)
From: Nathan Chancellor <nathan@kernel.org>
To: akpm@linux-foundation.org, masahiroy@kernel.org
Cc: nicolas@fjasle.eu, linux-kbuild@vger.kernel.org,
	llvm@lists.linux.dev,  patches@lists.linux.dev,
	linux-kernel@vger.kernel.org,
	 Nathan Chancellor <nathan@kernel.org>,
	catalin.marinas@arm.com,  will@kernel.org, mark.rutland@arm.com,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 05/11] arm64: Kconfig: Clean up tautological LLVM version checks
Date: Thu, 25 Jan 2024 15:55:11 -0700	[thread overview]
Message-ID: <20240125-bump-min-llvm-ver-to-13-0-1-v1-5-f5ff9bda41c5@kernel.org> (raw)
In-Reply-To: <20240125-bump-min-llvm-ver-to-13-0-1-v1-0-f5ff9bda41c5@kernel.org>

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@kernel.org>
---
Cc: catalin.marinas@arm.com
Cc: will@kernel.org
Cc: mark.rutland@arm.com
Cc: linux-arm-kernel@lists.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


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2024-01-25 22:56 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-25 22:55 [PATCH 00/11] Bump the minimum supported version of LLVM to 13.0.1 Nathan Chancellor
2024-01-25 22:55 ` Nathan Chancellor
2024-01-25 22:55 ` Nathan Chancellor
2024-01-25 22:55 ` Nathan Chancellor
2024-01-25 22:55 ` [PATCH 01/11] kbuild: Raise " Nathan Chancellor
2024-01-25 22:55 ` [PATCH 02/11] Makefile: Drop warn-stack-size plugin opt Nathan Chancellor
2024-01-25 22:55 ` [PATCH 03/11] x86: Drop stack-alignment " Nathan Chancellor
2024-01-25 22:55 ` [PATCH 04/11] ARM: Remove Thumb2 __builtin_thread_pointer workaround for Clang Nathan Chancellor
2024-01-25 22:55   ` Nathan Chancellor
2024-01-26  8:44   ` Ard Biesheuvel
2024-01-26  8:44     ` Ard Biesheuvel
2024-01-25 22:55 ` Nathan Chancellor [this message]
2024-01-25 22:55   ` [PATCH 05/11] arm64: Kconfig: Clean up tautological LLVM version checks Nathan Chancellor
2024-01-26 12:59   ` Mark Rutland
2024-01-26 12:59     ` Mark Rutland
2024-01-26 16:10     ` Nathan Chancellor
2024-01-26 16:10       ` Nathan Chancellor
2024-01-26 17:00       ` Mark Rutland
2024-01-26 17:00         ` Mark Rutland
2024-01-25 22:55 ` [PATCH 06/11] powerpc: Kconfig: Remove tautology in CONFIG_COMPAT Nathan Chancellor
2024-01-25 22:55   ` Nathan Chancellor
2024-01-25 22:55 ` [PATCH 07/11] riscv: Remove MCOUNT_NAME workaround Nathan Chancellor
2024-01-25 22:55   ` Nathan Chancellor
2024-01-25 22:55 ` [PATCH 08/11] riscv: Kconfig: Remove version dependency from CONFIG_CLANG_SUPPORTS_DYNAMIC_FTRACE Nathan Chancellor
2024-01-25 22:55   ` Nathan Chancellor
2024-01-25 22:55 ` [PATCH 09/11] fortify: Drop Clang version check for 12.0.1 or newer Nathan Chancellor
2024-01-25 23:09   ` Kees Cook
2024-01-25 22:55 ` [PATCH 10/11] lib/Kconfig.debug: Update Clang version check in CONFIG_KCOV Nathan Chancellor
2024-01-25 22:55 ` [PATCH 11/11] compiler-clang.h: Update __diag_clang() macros for minimum version bump Nathan Chancellor
2024-01-25 23:10 ` [PATCH 00/11] Bump the minimum supported version of LLVM to 13.0.1 Kees Cook
2024-01-25 23:10   ` Kees Cook
2024-01-25 23:10   ` Kees Cook
2024-01-25 23:10   ` Kees Cook
2024-03-25  4:42 ` patchwork-bot+linux-riscv
2024-03-25  4:42   ` patchwork-bot+linux-riscv
2024-03-25  4:42   ` patchwork-bot+linux-riscv
2024-03-25  4:42   ` patchwork-bot+linux-riscv

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