add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/s390/appldata/appldata_base.c
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@@ -51,10 +51,9 @@
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  */
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 static const char appldata_proc_name[APPLDATA_PROC_NAME_LENGTH] = "appldata";
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 static int appldata_timer_handler(struct ctl_table *ctl, int write,
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-				  void __user *buffer, size_t *lenp, loff_t *ppos);
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+				  void *buffer, size_t *lenp, loff_t *ppos);
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 static int appldata_interval_handler(struct ctl_table *ctl, int write,
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-					 void __user *buffer,
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-					 size_t *lenp, loff_t *ppos);
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+				     void *buffer, size_t *lenp, loff_t *ppos);
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 static struct ctl_table_header *appldata_sysctl_header;
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 static struct ctl_table appldata_table[] = {
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@@ -137,6 +136,14 @@
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 	mutex_unlock(&appldata_ops_mutex);
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 }
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+static struct appldata_product_id appldata_id = {
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+	.prod_nr    = {0xD3, 0xC9, 0xD5, 0xE4,
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+		       0xE7, 0xD2, 0xD9},	/* "LINUXKR" */
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+	.prod_fn    = 0xD5D3,			/* "NL" */
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+	.version_nr = 0xF2F6,			/* "26" */
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+	.release_nr = 0xF0F1,			/* "01" */
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+};
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+
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 /*
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  * appldata_diag()
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  *
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@@ -145,17 +152,22 @@
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 int appldata_diag(char record_nr, u16 function, unsigned long buffer,
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 			u16 length, char *mod_lvl)
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 {
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-	struct appldata_product_id id = {
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-		.prod_nr    = {0xD3, 0xC9, 0xD5, 0xE4,
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-			       0xE7, 0xD2, 0xD9},	/* "LINUXKR" */
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-		.prod_fn    = 0xD5D3,			/* "NL" */
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-		.version_nr = 0xF2F6,			/* "26" */
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-		.release_nr = 0xF0F1,			/* "01" */
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-	};
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+	struct appldata_parameter_list *parm_list;
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+	struct appldata_product_id *id;
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+	int rc;
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-	id.record_nr = record_nr;
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-	id.mod_lvl = (mod_lvl[0]) << 8 | mod_lvl[1];
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-	return appldata_asm(&id, function, (void *) buffer, length);
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+	parm_list = kmalloc(sizeof(*parm_list), GFP_KERNEL);
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+	id = kmemdup(&appldata_id, sizeof(appldata_id), GFP_KERNEL);
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+	rc = -ENOMEM;
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+	if (parm_list && id) {
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+		id->record_nr = record_nr;
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+		id->mod_lvl = (mod_lvl[0]) << 8 | mod_lvl[1];
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+		rc = appldata_asm(parm_list, id, function,
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+				  (void *) buffer, length);
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+	}
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+	kfree(id);
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+	kfree(parm_list);
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+	return rc;
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 }
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 /************************ timer, work, DIAG <END> ****************************/
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@@ -204,18 +216,16 @@
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  */
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 static int
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 appldata_timer_handler(struct ctl_table *ctl, int write,
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-			   void __user *buffer, size_t *lenp, loff_t *ppos)
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+			   void *buffer, size_t *lenp, loff_t *ppos)
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 {
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 	int timer_active = appldata_timer_active;
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-	int zero = 0;
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-	int one = 1;
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 	int rc;
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 	struct ctl_table ctl_entry = {
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 		.procname	= ctl->procname,
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 		.data		= &timer_active,
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 		.maxlen		= sizeof(int),
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-		.extra1		= &zero,
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-		.extra2		= &one,
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+		.extra1		= SYSCTL_ZERO,
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+		.extra2		= SYSCTL_ONE,
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 	};
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 	rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
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@@ -239,16 +249,15 @@
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  */
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 static int
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 appldata_interval_handler(struct ctl_table *ctl, int write,
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-			   void __user *buffer, size_t *lenp, loff_t *ppos)
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+			   void *buffer, size_t *lenp, loff_t *ppos)
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 {
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 	int interval = appldata_interval;
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-	int one = 1;
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 	int rc;
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 	struct ctl_table ctl_entry = {
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 		.procname	= ctl->procname,
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 		.data		= &interval,
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 		.maxlen		= sizeof(int),
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-		.extra1		= &one,
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+		.extra1		= SYSCTL_ONE,
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 	};
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 	rc = proc_dointvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
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@@ -270,19 +279,17 @@
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  */
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 static int
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 appldata_generic_handler(struct ctl_table *ctl, int write,
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-			   void __user *buffer, size_t *lenp, loff_t *ppos)
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+			   void *buffer, size_t *lenp, loff_t *ppos)
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 {
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 	struct appldata_ops *ops = NULL, *tmp_ops;
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 	struct list_head *lh;
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 	int rc, found;
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 	int active;
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-	int zero = 0;
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-	int one = 1;
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 	struct ctl_table ctl_entry = {
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 		.data		= &active,
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 		.maxlen		= sizeof(int),
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-		.extra1		= &zero,
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-		.extra2		= &one,
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+		.extra1		= SYSCTL_ZERO,
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+		.extra2		= SYSCTL_ONE,
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 	};
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 	found = 0;