driver core: bus: mark the struct bus_type for sysfs callbacks as constant

struct bus_type should never be modified in a sysfs callback as there is
nothing in the structure to modify, and frankly, the structure is almost
never used in a sysfs callback, so mark it as constant to allow struct
bus_type to be moved to read-only memory.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexandre Bounine <alex.bou9@gmail.com>
Cc: Alison Schofield <alison.schofield@intel.com>
Cc: Ben Widawsky <bwidawsk@kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Harald Freudenberger <freude@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Hu Haowen <src.res@email.cn>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Stuart Yoder <stuyoder@gmail.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Acked-by: Ilya Dryomov <idryomov@gmail.com> # rbd
Acked-by: Ira Weiny <ira.weiny@intel.com> # cxl
Reviewed-by: Alex Shi <alexs@kernel.org>
Acked-by: Iwona Winiarska <iwona.winiarska@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>	# pci
Acked-by: Wei Liu <wei.liu@kernel.org>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com> # scsi
Link: https://lore.kernel.org/r/20230313182918.1312597-23-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 21 insertions, 21 deletions

diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c
index f4cc1720156f..5a99e0b18289 100644
--- a/drivers/s390/crypto/ap_bus.c
+++ b/drivers/s390/crypto/ap_bus.c
@@ -1166,12 +1166,12 @@ EXPORT_SYMBOL(ap_parse_mask_str);
  * AP bus attributes.
  */
 
-static ssize_t ap_domain_show(struct bus_type *bus, char *buf)
+static ssize_t ap_domain_show(const struct bus_type *bus, char *buf)
 {
 	return scnprintf(buf, PAGE_SIZE, "%d\n", ap_domain_index);
 }
 
-static ssize_t ap_domain_store(struct bus_type *bus,
+static ssize_t ap_domain_store(const struct bus_type *bus,
 			       const char *buf, size_t count)
 {
 	int domain;
@@ -1193,7 +1193,7 @@ static ssize_t ap_domain_store(struct bus_type *bus,
 
 static BUS_ATTR_RW(ap_domain);
 
-static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf)
+static ssize_t ap_control_domain_mask_show(const struct bus_type *bus, char *buf)
 {
 	if (!ap_qci_info)	/* QCI not supported */
 		return scnprintf(buf, PAGE_SIZE, "not supported\n");
@@ -1208,7 +1208,7 @@ static ssize_t ap_control_domain_mask_show(struct bus_type *bus, char *buf)
 
 static BUS_ATTR_RO(ap_control_domain_mask);
 
-static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf)
+static ssize_t ap_usage_domain_mask_show(const struct bus_type *bus, char *buf)
 {
 	if (!ap_qci_info)	/* QCI not supported */
 		return scnprintf(buf, PAGE_SIZE, "not supported\n");
@@ -1223,7 +1223,7 @@ static ssize_t ap_usage_domain_mask_show(struct bus_type *bus, char *buf)
 
 static BUS_ATTR_RO(ap_usage_domain_mask);
 
-static ssize_t ap_adapter_mask_show(struct bus_type *bus, char *buf)
+static ssize_t ap_adapter_mask_show(const struct bus_type *bus, char *buf)
 {
 	if (!ap_qci_info)	/* QCI not supported */
 		return scnprintf(buf, PAGE_SIZE, "not supported\n");
@@ -1238,7 +1238,7 @@ static ssize_t ap_adapter_mask_show(struct bus_type *bus, char *buf)
 
 static BUS_ATTR_RO(ap_adapter_mask);
 
-static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf)
+static ssize_t ap_interrupts_show(const struct bus_type *bus, char *buf)
 {
 	return scnprintf(buf, PAGE_SIZE, "%d\n",
 			 ap_irq_flag ? 1 : 0);
@@ -1246,12 +1246,12 @@ static ssize_t ap_interrupts_show(struct bus_type *bus, char *buf)
 
 static BUS_ATTR_RO(ap_interrupts);
 
-static ssize_t config_time_show(struct bus_type *bus, char *buf)
+static ssize_t config_time_show(const struct bus_type *bus, char *buf)
 {
 	return scnprintf(buf, PAGE_SIZE, "%d\n", ap_config_time);
 }
 
-static ssize_t config_time_store(struct bus_type *bus,
+static ssize_t config_time_store(const struct bus_type *bus,
 				 const char *buf, size_t count)
 {
 	int time;
@@ -1265,12 +1265,12 @@ static ssize_t config_time_store(struct bus_type *bus,
 
 static BUS_ATTR_RW(config_time);
 
-static ssize_t poll_thread_show(struct bus_type *bus, char *buf)
+static ssize_t poll_thread_show(const struct bus_type *bus, char *buf)
 {
 	return scnprintf(buf, PAGE_SIZE, "%d\n", ap_poll_kthread ? 1 : 0);
 }
 
-static ssize_t poll_thread_store(struct bus_type *bus,
+static ssize_t poll_thread_store(const struct bus_type *bus,
 				 const char *buf, size_t count)
 {
 	int flag, rc;
@@ -1289,12 +1289,12 @@ static ssize_t poll_thread_store(struct bus_type *bus,
 
 static BUS_ATTR_RW(poll_thread);
 
-static ssize_t poll_timeout_show(struct bus_type *bus, char *buf)
+static ssize_t poll_timeout_show(const struct bus_type *bus, char *buf)
 {
 	return scnprintf(buf, PAGE_SIZE, "%llu\n", poll_timeout);
 }
 
-static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf,
+static ssize_t poll_timeout_store(const struct bus_type *bus, const char *buf,
 				  size_t count)
 {
 	unsigned long long time;
@@ -1318,21 +1318,21 @@ static ssize_t poll_timeout_store(struct bus_type *bus, const char *buf,
 
 static BUS_ATTR_RW(poll_timeout);
 
-static ssize_t ap_max_domain_id_show(struct bus_type *bus, char *buf)
+static ssize_t ap_max_domain_id_show(const struct bus_type *bus, char *buf)
 {
 	return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_domain_id);
 }
 
 static BUS_ATTR_RO(ap_max_domain_id);
 
-static ssize_t ap_max_adapter_id_show(struct bus_type *bus, char *buf)
+static ssize_t ap_max_adapter_id_show(const struct bus_type *bus, char *buf)
 {
 	return scnprintf(buf, PAGE_SIZE, "%d\n", ap_max_adapter_id);
 }
 
 static BUS_ATTR_RO(ap_max_adapter_id);
 
-static ssize_t apmask_show(struct bus_type *bus, char *buf)
+static ssize_t apmask_show(const struct bus_type *bus, char *buf)
 {
 	int rc;
 
@@ -1393,7 +1393,7 @@ static int apmask_commit(unsigned long *newapm)
 	return 0;
 }
 
-static ssize_t apmask_store(struct bus_type *bus, const char *buf,
+static ssize_t apmask_store(const struct bus_type *bus, const char *buf,
 			    size_t count)
 {
 	int rc, changes = 0;
@@ -1425,7 +1425,7 @@ done:
 
 static BUS_ATTR_RW(apmask);
 
-static ssize_t aqmask_show(struct bus_type *bus, char *buf)
+static ssize_t aqmask_show(const struct bus_type *bus, char *buf)
 {
 	int rc;
 
@@ -1486,7 +1486,7 @@ static int aqmask_commit(unsigned long *newaqm)
 	return 0;
 }
 
-static ssize_t aqmask_store(struct bus_type *bus, const char *buf,
+static ssize_t aqmask_store(const struct bus_type *bus, const char *buf,
 			    size_t count)
 {
 	int rc, changes = 0;
@@ -1518,13 +1518,13 @@ done:
 
 static BUS_ATTR_RW(aqmask);
 
-static ssize_t scans_show(struct bus_type *bus, char *buf)
+static ssize_t scans_show(const struct bus_type *bus, char *buf)
 {
 	return scnprintf(buf, PAGE_SIZE, "%llu\n",
 			 atomic64_read(&ap_scan_bus_count));
 }
 
-static ssize_t scans_store(struct bus_type *bus, const char *buf,
+static ssize_t scans_store(const struct bus_type *bus, const char *buf,
 			   size_t count)
 {
 	AP_DBF_INFO("%s force AP bus rescan\n", __func__);
@@ -1536,7 +1536,7 @@ static ssize_t scans_store(struct bus_type *bus, const char *buf,
 
 static BUS_ATTR_RW(scans);
 
-static ssize_t bindings_show(struct bus_type *bus, char *buf)
+static ssize_t bindings_show(const struct bus_type *bus, char *buf)
 {
 	int rc;
 	unsigned int apqns, n;