linux-kernel - [PATCH] intel_th: Constify attribute

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Date:   Thu,  4 Feb 2021 22:19:06 +0100
From:   Rikard Falkeborn <rikard.falkeborn@...il.com>
To:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org,
        Rikard Falkeborn <rikard.falkeborn@...il.com>
Subject: [PATCH] intel_th: Constify attribute_group structs

The only usage of them is to pass their address to sysfs_create_group()
and sysfs_remove_group(), both which have pointers to const
attribute_group structs as input. Make them const to allow the compiler
to put them in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@...il.com>
---
 drivers/hwtracing/intel_th/intel_th.h | 2 +-
 drivers/hwtracing/intel_th/msu.c      | 2 +-
 drivers/hwtracing/intel_th/pti.c      | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/hwtracing/intel_th/intel_th.h b/drivers/hwtracing/intel_th/intel_th.h
index 5fe694708b7a..ad9f9acd6b9c 100644
--- a/drivers/hwtracing/intel_th/intel_th.h
+++ b/drivers/hwtracing/intel_th/intel_th.h
@@ -178,7 +178,7 @@ struct intel_th_driver {
 	/* file_operations for those who want a device node */
 	const struct file_operations *fops;
 	/* optional attributes */
-	struct attribute_group	*attr_group;
+	const struct attribute_group *attr_group;
 
 	/* source ops */
 	int			(*set_output)(struct intel_th_device *thdev,
diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c
index 7d95242db900..2edc4666633d 100644
--- a/drivers/hwtracing/intel_th/msu.c
+++ b/drivers/hwtracing/intel_th/msu.c
@@ -2095,7 +2095,7 @@ static struct attribute *msc_output_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group msc_output_group = {
+static const struct attribute_group msc_output_group = {
 	.attrs	= msc_output_attrs,
 };
 
diff --git a/drivers/hwtracing/intel_th/pti.c b/drivers/hwtracing/intel_th/pti.c
index 0da6b787f553..09132ab8bc23 100644
--- a/drivers/hwtracing/intel_th/pti.c
+++ b/drivers/hwtracing/intel_th/pti.c
@@ -142,7 +142,7 @@ static struct attribute *pti_output_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group pti_output_group = {
+static const struct attribute_group pti_output_group = {
 	.attrs	= pti_output_attrs,
 };
 
@@ -295,7 +295,7 @@ static struct attribute *lpp_output_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group lpp_output_group = {
+static const struct attribute_group lpp_output_group = {
 	.attrs	= lpp_output_attrs,
 };
 
-- 
2.30.0