pstore: Replace arguments for write() API

Similar to the pstore_info read() callback, there were too many arguments.
This switches to the new struct pstore_record pointer instead. This adds
"reason" and "part" to the record structure as well.

Signed-off-by: Kees Cook <keescook@chromium.org>

drivers/acpi/apei/erst.c

@@ -926,9 +926,7 @@ static int erst_check_table(struct acpi_table_erst *erst_tab)
 static int erst_open_pstore(struct pstore_info *psi);
 static int erst_close_pstore(struct pstore_info *psi);
 static ssize_t erst_reader(struct pstore_record *record);
-static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
-		       u64 *id, unsigned int part, int count, bool compressed,
-		       size_t size, struct pstore_info *psi);
+static int erst_writer(struct pstore_record *record);
 static int erst_clearer(enum pstore_type_id type, u64 id, int count,
 			struct timespec time, struct pstore_info *psi);
 
@@ -1054,9 +1052,7 @@ out:
 	return (rc < 0) ? rc : (len - sizeof(*rcd));
 }
 
-static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
-		       u64 *id, unsigned int part, int count, bool compressed,
-		       size_t size, struct pstore_info *psi)
+static int erst_writer(struct pstore_record *record)
 {
 	struct cper_pstore_record *rcd = (struct cper_pstore_record *)
 					(erst_info.buf - sizeof(*rcd));
@@ -1071,21 +1067,21 @@ static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
 	/* timestamp valid. platform_id, partition_id are invalid */
 	rcd->hdr.validation_bits = CPER_VALID_TIMESTAMP;
 	rcd->hdr.timestamp = get_seconds();
-	rcd->hdr.record_length = sizeof(*rcd) + size;
+	rcd->hdr.record_length = sizeof(*rcd) + record->size;
 	rcd->hdr.creator_id = CPER_CREATOR_PSTORE;
 	rcd->hdr.notification_type = CPER_NOTIFY_MCE;
 	rcd->hdr.record_id = cper_next_record_id();
 	rcd->hdr.flags = CPER_HW_ERROR_FLAGS_PREVERR;
 
 	rcd->sec_hdr.section_offset = sizeof(*rcd);
-	rcd->sec_hdr.section_length = size;
+	rcd->sec_hdr.section_length = record->size;
 	rcd->sec_hdr.revision = CPER_SEC_REV;
 	/* fru_id and fru_text is invalid */
 	rcd->sec_hdr.validation_bits = 0;
 	rcd->sec_hdr.flags = CPER_SEC_PRIMARY;
-	switch (type) {
+	switch (record->type) {
 	case PSTORE_TYPE_DMESG:
-		if (compressed)
+		if (record->compressed)
 			rcd->sec_hdr.section_type = CPER_SECTION_TYPE_DMESG_Z;
 		else
 			rcd->sec_hdr.section_type = CPER_SECTION_TYPE_DMESG;
@@ -1099,7 +1095,7 @@ static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason,
 	rcd->sec_hdr.section_severity = CPER_SEV_FATAL;
 
 	ret = erst_write(&rcd->hdr);
-	*id = rcd->hdr.record_id;
+	record->id = rcd->hdr.record_id;
 
 	return ret;
 }