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| author | Marco Elver <elver@google.com> | 2026-05-15 14:43:31 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2026-05-28 12:20:19 +0200 |
| commit | f45c5c4adb27540d43302155e2fbaeca6c3c6d03 (patch) | |
| tree | 58bcdbc6456ce892e3fc4feb58dee5de4d5631f1 /Documentation/dev-tools | |
| parent | 7fd2df204f342fc17d1a0bfcd474b24232fb0f32 (diff) | |
| download | lwn-f45c5c4adb27540d43302155e2fbaeca6c3c6d03.tar.gz lwn-f45c5c4adb27540d43302155e2fbaeca6c3c6d03.zip | |
compiler-context-analysis: Bump required Clang version to 23
Clang 23 introduces several major improvements:
1. Support for multiple arguments in the `guarded_by` and
`pt_guarded_by` attributes [1]. This allows defining variables
protected by multiple context locks, where read access requires
holding at least one lock (shared or exclusive), and write access
requires holding all of them exclusively.
2. Function pointer support [2]. We can now add attributes to function
pointers just like we do on normal functions.
3. A fix to use arrays of locks [3]. Each index is now correctly treated
as a separate lock instance.
4. A fix for implicit member access in attributes [4]. This allows to
use __guarded_by(&foo->lock) correctly.
Overall that makes it worthwhile bumping the compiler version instead of
trying to make both Clang 22 and later work while supporting these new
features.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://github.com/llvm/llvm-project/pull/186838 [1]
Link: https://github.com/llvm/llvm-project/pull/191187 [2]
Link: https://github.com/llvm/llvm-project/pull/148551 [3]
Link: https://github.com/llvm/llvm-project/pull/194457 [4]
Link: https://patch.msgid.link/20260515124426.2227783-1-elver@google.com
Diffstat (limited to 'Documentation/dev-tools')
| -rw-r--r-- | Documentation/dev-tools/context-analysis.rst | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/dev-tools/context-analysis.rst b/Documentation/dev-tools/context-analysis.rst index 54d9ee28de98..8e71e1e75b5b 100644 --- a/Documentation/dev-tools/context-analysis.rst +++ b/Documentation/dev-tools/context-analysis.rst @@ -17,7 +17,7 @@ features. To enable for Clang, configure the kernel with:: CONFIG_WARN_CONTEXT_ANALYSIS=y -The feature requires Clang 22 or later. +The feature requires Clang 23 or later. The analysis is *opt-in by default*, and requires declaring which modules and subsystems should be analyzed in the respective `Makefile`:: |