linux-kernel - Re: [PATCH v1] drivers/acpi/scan.c: Fixup "acquire device_hotplug_lock in acpi_scan

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Message-ID: <20190731134422.GS9330@dhcp22.suse.cz>
Date:   Wed, 31 Jul 2019 15:44:22 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     David Hildenbrand <david@...hat.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-acpi@...r.kernel.org,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Oscar Salvador <osalvador@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v1] drivers/acpi/scan.c: Fixup "acquire
 device_hotplug_lock in acpi_scan_init()"

On Wed 31-07-19 15:37:56, David Hildenbrand wrote:
[...]
> The other extreme I saw: People dropping locks because they think they
> can be smart but end up making developers debug crashes for months (I am
> not lying).

Any lock removal should be accompanied with an explanation that is to be
a subject of the review. Sure people can make mistakes but there is no
way to around it I can see.
 
> As I want to move on with this patch and have other stuff to work on, I
> will adjust the comment you gave and add that instead of the lock.

Thanks!

-- 
Michal Hocko
SUSE Labs