Subject: Re: linux-next: build warning after merge of the tip tree

From: Peter Zijlstra <[email-masked]>
Date: Wed, 7 Jan 2026 22:54:09 +0100

On Wed, Jan 07, 2026 at 04:15:48PM +1100, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the tip tree, today's linux-next build (htmldocs) produced
> this warning:
> 
> Documentation/core-api/kref:328: include/linux/kref.h:72: WARNING: Invalid C declaration: Expected end of definition. [error at 96]
>   int kref_put_mutex (struct kref *kref, void (*release)(struct kref *kref), str
> uct mutex *mutex) __cond_acquires(true# mutex)
>   ------------------------------------------------------------------------------------------------^
> Documentation/core-api/kref:328: include/linux/kref.h:94: WARNING: Invalid C declaration: Expected end of definition. [error at 92]
>   int kref_put_lock (struct kref *kref, void (*release)(struct kref *kref), spinlock_t *lock) __cond_acquires(true# lock)
>   --------------------------------------------------------------------------------------------^
> 
> Introduced by commit
> 
>   5e256db9325e ("kref: Add context-analysis annotations")

I really have no clue what that thing is on about. The code is fine and
works as intended.

My go-to fix for anything kdoc is to change '/**' into '/*' until it
goes away.