///\r
/// EFI_DEP_REPLACE_TRUE - Used to dynamically patch the dependecy expression\r
/// to save time. A EFI_DEP_PUSH is evauated one an\r
-/// replaced with EFI_DEP_REPLACE_TRUE\r
+/// replaced with EFI_DEP_REPLACE_TRUE. If PI spec's Vol 2\r
+/// Driver Execution Environment Core Interface use 0xff\r
+/// as new DEPEX opcode. EFI_DEP_REPLACE_TRUE should be\r
+/// defined to a new value that is not conflicting with PI spec.\r
///\r
#define EFI_DEP_REPLACE_TRUE 0xff\r
\r