linux-kernel - Re: [PATCH v2] iommu: simplify list initialization in iommu_create_device_direct_mappings() and iommu_group_show_resv

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Message-ID: <34ed442d-6ebd-4907-a77c-2c08db799411@web.de>
Date: Mon, 12 Jan 2026 13:30:42 +0100
From: Markus Elfring <Markus.Elfring@....de>
To: Can Peng <pengcan@...inos.cn>, iommu@...ts.linux.dev, cocci@...ia.fr,
 Jörg Rödel <joro@...tes.org>,
 Robin Murphy <robin.murphy@....com>, Vasant Hegde <vasant.hegde@....com>,
 Will Deacon <will@...nel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH v2] iommu: simplify list initialization in
 iommu_create_device_direct_mappings() and iommu_group_show_resv_regions()

> Changes since v1:
>  - Extend the cleanup to iommu_group_show_resv_regions() as suggested by
>    reviewer, applying the same LIST_HEAD() pattern consistently across
>    the file.

Thanks for your interest in further code adjustments.

* I wonder how they fit to the feedback “Applied, thanks.” by Jörg Rödel
  from 2026-01-10.
  https://lore.kernel.org/lkml/stpavkxy3sbevk7zmt4kxyecqy5gc6phubvcfutbtnuk7vphlh@a7aimtvk423i/
  https://lkml.org/lkml/2026/1/10/235

* A shorter summary phrase might become more desirable for this patch variant.
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.19-rc4#n687

* Will development interests grow also for another transformation approach
  like the following by the means of the semantic patch language (Coccinelle software)?

@replacement@
expression e;
identifier i;
@@
-struct list_head i;
 ... when exists
     when != i = e
-INIT_LIST_HEAD
+LIST_HEAD
               (
-               &
                i
               );

  I determined that 175 source files of the software “Linux next-20260109” contain
  corresponding update candidates.

Regards,
Markus