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-rw-r--r--include/linux/filter.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h
index d64498da2a0c..22e9bd1cf047 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -53,6 +53,9 @@ struct bpf_prog_aux;
#define BPF_REG_AX MAX_BPF_REG
#define MAX_BPF_JIT_REG (MAX_BPF_REG + 1)
+/* unused opcode to mark special call to bpf_tail_call() helper */
+#define BPF_TAIL_CALL 0xf0
+
/* BPF program can access up to 512 bytes of stack space. */
#define MAX_BPF_STACK 512