s390/ipl: add DEFINE_GENERIC_LOADPARM()

In the current code each reipl type implements its own pair of loadparm
show/store functions. Add a macro to deduplicate the code a bit.

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Fixes: 87fd22e ("s390/ipl: add eckd support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

Author: svens-s390

arch/s390/kernel/ipl.c

@@ -888,23 +888,26 @@ static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 	return len;
 }
 
-/* FCP wrapper */
-static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
-				       struct kobj_attribute *attr, char *page)
-{
-	return reipl_generic_loadparm_show(reipl_block_fcp, page);
-}
-
-static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
-					struct kobj_attribute *attr,
-					const char *buf, size_t len)
-{
-	return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
-}
-
-static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
-	__ATTR(loadparm, 0644, reipl_fcp_loadparm_show,
-	       reipl_fcp_loadparm_store);
+#define DEFINE_GENERIC_LOADPARM(name)							\
+static ssize_t reipl_##name##_loadparm_show(struct kobject *kobj,			\
+					    struct kobj_attribute *attr, char *page)	\
+{											\
+	return reipl_generic_loadparm_show(reipl_block_##name, page);			\
+}											\
+static ssize_t reipl_##name##_loadparm_store(struct kobject *kobj,			\
+					     struct kobj_attribute *attr,		\
+					     const char *buf, size_t len)		\
+{											\
+	return reipl_generic_loadparm_store(reipl_block_##name, buf, len);		\
+}											\
+static struct kobj_attribute sys_reipl_##name##_loadparm_attr =				\
+	__ATTR(loadparm, 0644, reipl_##name##_loadparm_show,				\
+	       reipl_##name##_loadparm_store)
+
+DEFINE_GENERIC_LOADPARM(fcp);
+DEFINE_GENERIC_LOADPARM(nvme);
+DEFINE_GENERIC_LOADPARM(ccw);
+DEFINE_GENERIC_LOADPARM(nss);
 
 static ssize_t reipl_fcp_clear_show(struct kobject *kobj,
 				    struct kobj_attribute *attr, char *page)
@@ -994,24 +997,6 @@ DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
 DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
 		   reipl_block_nvme->nvme.br_lba);
 
-/* nvme wrapper */
-static ssize_t reipl_nvme_loadparm_show(struct kobject *kobj,
-				       struct kobj_attribute *attr, char *page)
-{
-	return reipl_generic_loadparm_show(reipl_block_nvme, page);
-}
-
-static ssize_t reipl_nvme_loadparm_store(struct kobject *kobj,
-					struct kobj_attribute *attr,
-					const char *buf, size_t len)
-{
-	return reipl_generic_loadparm_store(reipl_block_nvme, buf, len);
-}
-
-static struct kobj_attribute sys_reipl_nvme_loadparm_attr =
-	__ATTR(loadparm, 0644, reipl_nvme_loadparm_show,
-	       reipl_nvme_loadparm_store);
-
 static struct attribute *reipl_nvme_attrs[] = {
 	&sys_reipl_nvme_fid_attr.attr,
 	&sys_reipl_nvme_nsid_attr.attr,
@@ -1047,38 +1032,6 @@ static struct kobj_attribute sys_reipl_nvme_clear_attr =
 /* CCW reipl device attributes */
 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
 
-/* NSS wrapper */
-static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
-				       struct kobj_attribute *attr, char *page)
-{
-	return reipl_generic_loadparm_show(reipl_block_nss, page);
-}
-
-static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
-					struct kobj_attribute *attr,
-					const char *buf, size_t len)
-{
-	return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
-}
-
-/* CCW wrapper */
-static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
-				       struct kobj_attribute *attr, char *page)
-{
-	return reipl_generic_loadparm_show(reipl_block_ccw, page);
-}
-
-static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
-					struct kobj_attribute *attr,
-					const char *buf, size_t len)
-{
-	return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
-}
-
-static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
-	__ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
-	       reipl_ccw_loadparm_store);
-
 static ssize_t reipl_ccw_clear_show(struct kobject *kobj,
 				    struct kobj_attribute *attr, char *page)
 {
@@ -1251,10 +1204,6 @@ static struct kobj_attribute sys_reipl_nss_name_attr =
 	__ATTR(name, 0644, reipl_nss_name_show,
 	       reipl_nss_name_store);
 
-static struct kobj_attribute sys_reipl_nss_loadparm_attr =
-	__ATTR(loadparm, 0644, reipl_nss_loadparm_show,
-	       reipl_nss_loadparm_store);
-
 static struct attribute *reipl_nss_attrs[] = {
 	&sys_reipl_nss_name_attr.attr,
 	&sys_reipl_nss_loadparm_attr.attr,