linux-kernel - Re: [PATCH] mm: fix lockdep issues in writeback handling

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Message-ID: <345d49d2-5b6b-4307-824b-5167db737ad2@redhat.com>
Date: Wed, 27 Aug 2025 21:57:05 +0200
From: David Hildenbrand <david@...hat.com>
To: Marek Szyprowski <m.szyprowski@...sung.com>,
 linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
 Andrew Morton <akpm@...ux-foundation.org>,
 Miklos Szeredi <mszeredi@...hat.com>, Joanne Koong <joannelkoong@...il.com>
Subject: Re: [PATCH] mm: fix lockdep issues in writeback handling

On 26.08.25 15:09, Marek Szyprowski wrote:
> Commit 167f21a81a9c ("mm: remove BDI_CAP_WRITEBACK_ACCT") removed
> BDI_CAP_WRITEBACK_ACCT flag and refactored code that depend on it.
> Unfortunately it also moved some variable intialization out of guarded
> scope in writeback handling, what triggers a true lockdep warning. Fix
> this by moving initialization to the proper place.

Nasty

> 
> Fixes: 167f21a81a9c ("mm: remove BDI_CAP_WRITEBACK_ACCT")
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> ---

Acked-by: David Hildenbrand <david@...hat.com>

-- 
Cheers

David / dhildenb