1 files changed, 4 insertions, 3 deletions

diff --git a/tools/include/uapi/linux/bpf_common.h b/tools/include/uapi/linux/bpf_common.h
index 18be90725ab0..ee97668bdadb 100644
--- a/tools/include/uapi/linux/bpf_common.h
+++ b/tools/include/uapi/linux/bpf_common.h
@@ -15,9 +15,10 @@
 
 /* ld/ldx fields */
 #define BPF_SIZE(code)  ((code) & 0x18)
-#define         BPF_W           0x00
-#define         BPF_H           0x08
-#define         BPF_B           0x10
+#define         BPF_W           0x00 /* 32-bit */
+#define         BPF_H           0x08 /* 16-bit */
+#define         BPF_B           0x10 /*  8-bit */
+/* eBPF         BPF_DW          0x18    64-bit */
 #define BPF_MODE(code)  ((code) & 0xe0)
 #define         BPF_IMM         0x00
 #define         BPF_ABS         0x20