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-rw-r--r--include/uapi/linux/bpf.h2
-rw-r--r--include/uapi/linux/bpf_common.h7
2 files changed, 5 insertions, 4 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 7c2259e8bc54..74dc4dc98681 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -17,7 +17,7 @@
#define BPF_ALU64 0x07 /* alu mode in double word width */
/* ld/ldx fields */
-#define BPF_DW 0x18 /* double word */
+#define BPF_DW 0x18 /* double word (64-bit) */
#define BPF_XADD 0xc0 /* exclusive add */
/* alu/jmp fields */
diff --git a/include/uapi/linux/bpf_common.h b/include/uapi/linux/bpf_common.h
index 18be90725ab0..ee97668bdadb 100644
--- a/include/uapi/linux/bpf_common.h
+++ b/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