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lib/Kconfig.debug: Require a release version of LLVM 22 for context analysis

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Using a prerelease version as a minimum supported version for
CONFIG_WARN_CONTEXT_ANALYSIS was reasonable to do while LLVM 22 was the
development version so that people could immediately build from main and
start testing and validating this in their own code. However, it can be
problematic when using prerelease versions of LLVM 22, such as Android
clang 22.0.1 (the current android mainline compiler) or when bisecting
LLVM between llvmorg-22-init and llvmorg-23-init, to build the kernel,
as all compiler fixes for the context analysis may not be present,
potentially resulting in warnings that can easily turn into errors.

Now that LLVM 22 is released as 22.1.0, upgrade the check to require at
least this version to ensure that a user's toolchain actually has all
the changes needed for a smooth experience with context analysis.

Fixes: 3269701cb2 ("compiler-context-analysis: Add infrastructure for Context Analysis with Clang")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Marco Elver <elver@google.com>
Link: https://patch.msgid.link/20260224-bump-clang-ver-context-analysis-v1-1-16cc7a90a040@kernel.org
This commit is contained in:
Nathan Chancellor 2026-02-24 16:16:30 -07:00 • committed by Peter Zijlstra
parent 6de23f81a5
commit ab6088e7a9
1 changed files with 2 additions and 2 deletions
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lib/Kconfig.debug
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@ -630,7 +630,7 @@ config DEBUG_FORCE_WEAK_PER_CPU
config WARN_CONTEXT_ANALYSIS
bool "Compiler context-analysis warnings"
depends on CC_IS_CLANG && CLANG_VERSION >= 220000
depends on CC_IS_CLANG && CLANG_VERSION >= 220100
# Branch profiling re-defines "if", which messes with the compiler's
# ability to analyze __cond_acquires(..), resulting in false positives.
depends on !TRACE_BRANCH_PROFILING
@ -641,7 +641,7 @@ config WARN_CONTEXT_ANALYSIS
and releasing user-definable "context locks".
Clang's name of the feature is "Thread Safety Analysis". Requires
Clang 22 or later.
Clang 22.1.0 or later.
Produces warnings by default. Select CONFIG_WERROR if you wish to
turn these warnings into errors.