Re: [tip: locking/core] locking/rtmutex: Annotate API and implementation

[Nathan Chancellor <nathan@kernel.org>]

On Tue, May 05, 2026 at 10:55:34AM -0000, tip-bot2 for Bart Van Assche wrote:
> The following commit has been merged into the locking/core branch of tip:
> 
> Commit-ID:     d30a456aa7ce1bab05d9b364eeacad0c9cb10cc2
> Gitweb:        https://git.kernel.org/tip/d30a456aa7ce1bab05d9b364eeacad0c9cb10cc2
> Author:        Bart Van Assche <bvanassche@acm.org>
> AuthorDate:    Tue, 05 May 2026 04:26:44 +02:00
> Committer:     Peter Zijlstra <peterz@infradead.org>
> CommitterDate: Tue, 05 May 2026 12:50:49 +02:00
> 
> locking/rtmutex: Annotate API and implementation
> 
> Add lock context annotations to the rtmutex API and implementation and
> enable lock context analysis.
> 
> Signed-off-by: Bart Van Assche <bvanassche@acm.org>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Link: https://patch.msgid.link/20260505022649.870788-1-bvanassche@acm.org

This breaks the build for me.

  $ make -skj"$(nproc)" ARCH=x86_64 LLVM=1 mrproper defconfig kernel/locking/rtmutex_api.o
  kernel/locking/rtmutex_api.c:93:1: error: expecting rt_mutex 'lock' to be held at the end of function [-Werror,-Wthread-safety-analysis]
     93 | }
        | ^
  kernel/locking/rtmutex_api.c:90:14: note: rt_mutex acquired here
     90 | void __sched rt_mutex_lock(struct rt_mutex *lock)
        |              ^
  1 error generated.

This is with LLVM 22.1.5, in case it matters.

Cheers,
Nathan