Re: [PATCH v7 1/5] dax/bus.c: replace driver-core lock usage by a local rwsem

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To: "Verma, Vishal L" <vishal.l.verma@xxxxxxxxx>
Subject: Re: [PATCH v7 1/5] dax/bus.c: replace driver-core lock usage by a local rwsem
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 12 Mar 2024 13:22:33 -0700
Cc: "Williams, Dan J" <dan.j.williams@xxxxxxxxx>, "Jiang, Dave" <dave.jiang@xxxxxxxxx>, "osalvador@xxxxxxx" <osalvador@xxxxxxx>, "david@xxxxxxxxxx" <david@xxxxxxxxxx>, "gregkh@xxxxxxxxxxxxxxxxxxx" <gregkh@xxxxxxxxxxxxxxxxxxx>, "Huang, Ying" <ying.huang@xxxxxxxxx>, "linux-cxl@xxxxxxxxxxxxxxx" <linux-cxl@xxxxxxxxxxxxxxx>, "dave.hansen@xxxxxxxxxxxxxxx" <dave.hansen@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, "willy@xxxxxxxxxxxxx" <willy@xxxxxxxxxxxxx>, "nvdimm@xxxxxxxxxxxxxxx" <nvdimm@xxxxxxxxxxxxxxx>
In-reply-to: <ebc79448a1fdb47ff16144c12cd5d8dfc733dee8.camel@intel.com>
References: <20240124-vv-dax_abi-v7-0-20d16cb8d23d@intel.com> <20240124-vv-dax_abi-v7-1-20d16cb8d23d@intel.com> <65f0b5ef41817_aa222941a@dwillia2-mobl3.amr.corp.intel.com.notmuch> <ebc79448a1fdb47ff16144c12cd5d8dfc733dee8.camel@intel.com>

On Tue, 12 Mar 2024 20:20:17 +0000 "Verma, Vishal L" <vishal.l.verma@xxxxxxxxx> wrote:

> > All of these WARN_ON_ONCE() usages should be replaced with
> > lockdep_assert_held() and lockdep_assert_held_write() where appropriate.
> 
> Makes sense - I can send a patch post -rc1 to change these if that's okay Andrew?

Please do.

References:
- [PATCH v7 0/5] Add DAX ABI for memmap_on_memory
  - From: Vishal Verma
- [PATCH v7 1/5] dax/bus.c: replace driver-core lock usage by a local rwsem
  - From: Vishal Verma
- Re: [PATCH v7 1/5] dax/bus.c: replace driver-core lock usage by a local rwsem
  - From: Dan Williams
- Re: [PATCH v7 1/5] dax/bus.c: replace driver-core lock usage by a local rwsem
  - From: Verma, Vishal L

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