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Message-Id: <20250105-class_fix-v6-6-3a2f1768d4d4@quicinc.com>
Date: Sun, 05 Jan 2025 16:34:07 +0800
From: Zijun Hu <zijun_hu@...oud.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>, Tejun Heo <tj@...nel.org>,
Josef Bacik <josef@...icpanda.com>, Jens Axboe <axboe@...nel.dk>,
Boris Burkov <boris@....io>, Davidlohr Bueso <dave@...olabs.net>,
Jonathan Cameron <jonathan.cameron@...wei.com>,
Dave Jiang <dave.jiang@...el.com>,
Alison Schofield <alison.schofield@...el.com>,
Vishal Verma <vishal.l.verma@...el.com>, Ira Weiny <ira.weiny@...el.com>,
Dan Williams <dan.j.williams@...el.com>, Danilo Krummrich <dakr@...nel.org>,
Zijun Hu <zijun_hu@...oud.com>, linux-kernel@...r.kernel.org,
cgroups@...r.kernel.org, linux-block@...r.kernel.org,
linux-cxl@...r.kernel.org, Zijun Hu <quic_zijuhu@...cinc.com>,
Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH v6 6/8] driver core: Correct API
device_for_each_child_reverse_from() prototype
From: Zijun Hu <quic_zijuhu@...cinc.com>
For API device_for_each_child_reverse_from(..., const void *data,
int (*fn)(struct device *dev, const void *data))
- Type of @data is const pointer, and means caller's data @*data is not
allowed to be modified, but that usually is not proper for such non
finding device iterating API.
- Types for both @data and @fn are not consistent with all other
for_each device iterating APIs device_for_each_child(_reverse)(),
bus_for_each_dev() and (driver|class)_for_each_device().
Correct its prototype by removing const from parameter types, then adapt
for various existing usages.
An dedicated typedef device_iter_t will be introduced as @fn() type for
various for_each device interating APIs later.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
---
drivers/base/core.c | 4 ++--
drivers/cxl/core/hdm.c | 2 +-
drivers/cxl/core/region.c | 2 +-
include/linux/device.h | 4 ++--
4 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index d3800f0dc5bbd2a7de80bd58b50e31038265da03..5ee53b3bca6a4b4e1fa3cc3c8acd63ed7fd01b63 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -4043,8 +4043,8 @@ EXPORT_SYMBOL_GPL(device_for_each_child_reverse);
* device_for_each_child_reverse_from();
*/
int device_for_each_child_reverse_from(struct device *parent,
- struct device *from, const void *data,
- int (*fn)(struct device *, const void *))
+ struct device *from, void *data,
+ int (*fn)(struct device *, void *))
{
struct klist_iter i;
struct device *child;
diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c
index 28edd5822486851912393f066478252b20abc19d..50e6a45b30ba260c066a0781b9ed3a2f6f3462d7 100644
--- a/drivers/cxl/core/hdm.c
+++ b/drivers/cxl/core/hdm.c
@@ -703,7 +703,7 @@ static int cxl_decoder_commit(struct cxl_decoder *cxld)
return 0;
}
-static int commit_reap(struct device *dev, const void *data)
+static int commit_reap(struct device *dev, void *data)
{
struct cxl_port *port = to_cxl_port(dev->parent);
struct cxl_decoder *cxld;
diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index bfecd71040c2f4373645380b4c31327d8b42d095..a4cff4c266e7a7dd6a3feb1513bf14b7d3f9afa2 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -778,7 +778,7 @@ static size_t show_targetN(struct cxl_region *cxlr, char *buf, int pos)
return rc;
}
-static int check_commit_order(struct device *dev, const void *data)
+static int check_commit_order(struct device *dev, void *data)
{
struct cxl_decoder *cxld = to_cxl_decoder(dev);
diff --git a/include/linux/device.h b/include/linux/device.h
index a9d928398895b062094b94f2c188cbe9951d7ac1..025bac08fca7b2513acb1fbcb666be1dc64f03d1 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -1079,8 +1079,8 @@ int device_for_each_child(struct device *parent, void *data,
int device_for_each_child_reverse(struct device *parent, void *data,
int (*fn)(struct device *dev, void *data));
int device_for_each_child_reverse_from(struct device *parent,
- struct device *from, const void *data,
- int (*fn)(struct device *, const void *));
+ struct device *from, void *data,
+ int (*fn)(struct device *, void *));
struct device *device_find_child(struct device *parent, const void *data,
device_match_t match);
struct device *device_find_child_by_name(struct device *parent,
--
2.34.1
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