The patch titled
Subject: kernel/resource: simplify API __devm_release_region() implementation
has been added to the -mm mm-nonmm-unstable branch. Its filename is
kernel-resource-simplify-api-__devm_release_region-implementation.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kernel-resource-simplify-api-__devm_release_region-implementation.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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From: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
Subject: kernel/resource: simplify API __devm_release_region() implementation
Date: Thu, 17 Oct 2024 23:34:49 +0800
Simplify __devm_release_region() implementation by dedicated API
devres_release() which have below advantages than current
__release_region() + devres_destroy():
It is simpler if __devm_release_region() is undoing what
__devm_request_region() did, otherwise, it can avoid wrong and undesired
__release_region().
Link: https://lkml.kernel.org/r/20241017-release_region_fix-v1-1-84a3e8441284@xxxxxxxxxxx
Signed-off-by: Zijun Hu <quic_zijuhu@xxxxxxxxxxx>
Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Cc: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/resource.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/kernel/resource.c~kernel-resource-simplify-api-__devm_release_region-implementation
+++ a/kernel/resource.c
@@ -1683,8 +1683,7 @@ void __devm_release_region(struct device
{
struct region_devres match_data = { parent, start, n };
- __release_region(parent, start, n);
- WARN_ON(devres_destroy(dev, devm_region_release, devm_region_match,
+ WARN_ON(devres_release(dev, devm_region_release, devm_region_match,
&match_data));
}
EXPORT_SYMBOL(__devm_release_region);
_
Patches currently in -mm which might be from quic_zijuhu@xxxxxxxxxxx are
kernel-resource-simplify-api-__devm_release_region-implementation.patch
