s390/appldata: pass parameter list pointer to appldata_asm

In preparation for CONFIG_VMAP_STACK=y move the allocation of the
struct appldata_parameter_list to the caller of appldata_asm().

Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/appldata/appldata_base.c

@@ -145,6 +145,7 @@ static void appldata_work_fn(struct work_struct *work)
 int appldata_diag(char record_nr, u16 function, unsigned long buffer,
 			u16 length, char *mod_lvl)
 {
+	struct appldata_parameter_list parm_list;
 	struct appldata_product_id id = {
 		.prod_nr    = {0xD3, 0xC9, 0xD5, 0xE4,
 			       0xE7, 0xD2, 0xD9},	/* "LINUXKR" */
@@ -155,7 +156,8 @@ int appldata_diag(char record_nr, u16 function, unsigned long buffer,
 
 	id.record_nr = record_nr;
 	id.mod_lvl = (mod_lvl[0]) << 8 | mod_lvl[1];
-	return appldata_asm(&id, function, (void *) buffer, length);
+	return appldata_asm(&parm_list, &id, function,
+			    (void *) buffer, length);
 }
 /************************ timer, work, DIAG <END> ****************************/
 

arch/s390/include/asm/appldata.h

@@ -40,26 +40,27 @@ struct appldata_product_id {
 	u16  mod_lvl;		/* modification level */
 } __attribute__ ((packed));
 
-static inline int appldata_asm(struct appldata_product_id *id,
+
+static inline int appldata_asm(struct appldata_parameter_list *parm_list,
+			       struct appldata_product_id *id,
 			       unsigned short fn, void *buffer,
 			       unsigned short length)
 {
-	struct appldata_parameter_list parm_list;
 	int ry;
 
 	if (!MACHINE_IS_VM)
 		return -EOPNOTSUPP;
-	parm_list.diag = 0xdc;
-	parm_list.function = fn;
-	parm_list.parlist_length = sizeof(parm_list);
-	parm_list.buffer_length = length;
-	parm_list.product_id_addr = (unsigned long) id;
-	parm_list.buffer_addr = virt_to_phys(buffer);
+	parm_list->diag = 0xdc;
+	parm_list->function = fn;
+	parm_list->parlist_length = sizeof(*parm_list);
+	parm_list->buffer_length = length;
+	parm_list->product_id_addr = (unsigned long) id;
+	parm_list->buffer_addr = virt_to_phys(buffer);
 	diag_stat_inc(DIAG_STAT_X0DC);
 	asm volatile(
 		"	diag	%1,%0,0xdc"
 		: "=d" (ry)
-		: "d" (&parm_list), "m" (parm_list), "m" (*id)
+		: "d" (parm_list), "m" (*parm_list), "m" (*id)
 		: "cc");
 	return ry;
 }

drivers/s390/char/monwriter.c

@@ -58,6 +58,7 @@ struct mon_private {
 
 static int monwrite_diag(struct monwrite_hdr *myhdr, char *buffer, int fcn)
 {
+	struct appldata_parameter_list parm_list;
 	struct appldata_product_id id;
 	int rc;
 
@@ -67,7 +68,8 @@ static int monwrite_diag(struct monwrite_hdr *myhdr, char *buffer, int fcn)
 	id.version_nr = myhdr->version;
 	id.release_nr = myhdr->release;
 	id.mod_lvl = myhdr->mod_level;
-	rc = appldata_asm(&id, fcn, (void *) buffer, myhdr->datalen);
+	rc = appldata_asm(&parm_list, &id, fcn,
+			  (void *) buffer, myhdr->datalen);
 	if (rc <= 0)
 		return rc;
 	pr_err("Writing monitor data failed with rc=%i\n", rc);