ima: Use designated initializers for struct ima_event_data

Designated initializers allow specifying only the members of the struct
that need initialization. Non-mentioned members are initialized to zero.

This makes the code a bit clearer (particularly in ima_add_boot_aggregate)
and also allows adding a new member to the struct without having to update
all struct initializations.

Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

security/integrity/ima/ima_api.c

@@ -133,8 +133,10 @@ void ima_add_violation(struct file *file, const unsigned char *filename,
 {
 	struct ima_template_entry *entry;
 	struct inode *inode = file_inode(file);
-	struct ima_event_data event_data = {iint, file, filename, NULL, 0,
+	struct ima_event_data event_data = { .iint = iint,
-					    cause};
+					     .file = file,
+					     .filename = filename,
+					     .violation = cause };
 	int violation = 1;
 	int result;
 
@@ -284,8 +286,11 @@ void ima_store_measurement(struct integrity_iint_cache *iint,
 	int result = -ENOMEM;
 	struct inode *inode = file_inode(file);
 	struct ima_template_entry *entry;
-	struct ima_event_data event_data = {iint, file, filename, xattr_value,
+	struct ima_event_data event_data = { .iint = iint,
-					    xattr_len, NULL};
+					     .file = file,
+					     .filename = filename,
+					     .xattr_value = xattr_value,
+					     .xattr_len = xattr_len };
 	int violation = 0;
 
 	if (iint->measured_pcrs & (0x1 << pcr))

security/integrity/ima/ima_init.c

@@ -49,8 +49,8 @@ static int __init ima_add_boot_aggregate(void)
 	const char *audit_cause = "ENOMEM";
 	struct ima_template_entry *entry;
 	struct integrity_iint_cache tmp_iint, *iint = &tmp_iint;
-	struct ima_event_data event_data = {iint, NULL, boot_aggregate_name,
+	struct ima_event_data event_data = { .iint = iint,
-					    NULL, 0, NULL};
+					     .filename = boot_aggregate_name };
 	int result = -ENOMEM;
 	int violation = 0;
 	struct {