linux-kernel - Re: [PATCH] mm: mmap_lock: fix disabling preemption directly

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Message-ID: <20210720093937.GV3809@techsingularity.net>
Date:   Tue, 20 Jul 2021 10:39:37 +0100
From:   Mel Gorman <mgorman@...hsingularity.net>
To:     Muchun Song <songmuchun@...edance.com>
Cc:     akpm@...ux-foundation.org, shy828301@...il.com,
        cuibixuan@...wei.com, vbabka@...e.cz, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: mmap_lock: fix disabling preemption directly

On Tue, Jul 20, 2021 at 03:42:28PM +0800, Muchun Song wrote:
> The commit 832b50725373 ("mm: mmap_lock: use local locks instead of
> disabling preemption") fix a bug by using local locks. But commit
> d01079f3d0c0 ("mm/mmap_lock: remove dead code for !CONFIG_TRACING
> configurations") changes those lines to original version. I guess
> it is introduced by the conflicts fixing on merging.
> 
> Fixes: d01079f3d0c0 ("mm/mmap_lock: remove dead code for !CONFIG_TRACING configurations")
> Signed-off-by: Muchun Song <songmuchun@...edance.com>

Acked-by: Mel Gorman <mgorman@...hsingularity.net>

-- 
Mel Gorman
SUSE Labs