29  *              exception on bad checksum.
37 	u8 checksum;  in acpi_ut_verify_checksum()  local
41 	 * They are the odd tables, have no standard ACPI header and no checksum  in acpi_ut_verify_checksum()
48 	/* Compute the checksum on the table */  in acpi_ut_verify_checksum()
51 	checksum =  in acpi_ut_verify_checksum()
53 				      table->checksum);  in acpi_ut_verify_checksum()
55 	/* Computed checksum matches table? */  in acpi_ut_verify_checksum()
57 	if (checksum != table->checksum) {  in acpi_ut_verify_checksum()
59 				   "Incorrect checksum in table [%4.4s] - 0x%2.2X, "  in acpi_ut_verify_checksum()
61 				   table->signature, table->checksum,  in acpi_ut_verify_checksum()
62 				   table->checksum - checksum));  in acpi_ut_verify_checksum()
82  *              returns an exception on bad checksum.
89 	u8 checksum;  in acpi_ut_verify_cdat_checksum()  local
91 	/* Compute the checksum on the table */  in acpi_ut_verify_cdat_checksum()
93 	checksum = acpi_ut_generate_checksum(ACPI_CAST_PTR(u8, cdat_table),  in acpi_ut_verify_cdat_checksum()
95 					     cdat_table->checksum);  in acpi_ut_verify_cdat_checksum()
97 	/* Computed checksum matches table? */  in acpi_ut_verify_cdat_checksum()
99 	if (checksum != cdat_table->checksum) {  in acpi_ut_verify_cdat_checksum()
101 				   "Incorrect checksum in table [%4.4s] - 0x%2.2X, "  in acpi_ut_verify_cdat_checksum()
103 				   acpi_gbl_CDAT, cdat_table->checksum,  in acpi_ut_verify_cdat_checksum()
104 				   checksum));  in acpi_ut_verify_cdat_checksum()
111 	cdat_table->checksum = checksum;  in acpi_ut_verify_cdat_checksum()
121  *              original_checksum   - Value of the checksum field
123  * RETURN:      8 bit checksum of buffer
125  * DESCRIPTION: Computes an 8 bit checksum of the table.
131 	u8 checksum;  in acpi_ut_generate_checksum()  local
135 	checksum = acpi_ut_checksum((u8 *)table, length);  in acpi_ut_generate_checksum()
137 	/* Subtract off the existing checksum value in the table */  in acpi_ut_generate_checksum()
139 	checksum = (u8)(checksum - original_checksum);  in acpi_ut_generate_checksum()
141 	/* Compute and return the final checksum */  in acpi_ut_generate_checksum()
143 	checksum = (u8)(0 - checksum);  in acpi_ut_generate_checksum()
144 	return (checksum);  in acpi_ut_generate_checksum()
154  * RETURN:      Checksum (u8)
156  * DESCRIPTION: Calculates circular checksum of memory region.