s390/bpf: fix stack allocation

[firefly-linux-kernel-4.4.55.git] / arch / s390 / net / bpf_jit.h

diff --git a/arch/s390/net/bpf_jit.h b/arch/s390/net/bpf_jit.h
index ba8593a515baaa274d968aa64e6f54125238c032..de156ba3bd71c0d4db274a619c7c9fd6038c119c 100644 (file)
--- a/arch/s390/net/bpf_jit.h
+++ b/arch/s390/net/bpf_jit.h
@@ -48,7 +48,9 @@ extern u8 sk_load_word[], sk_load_half[], sk_load_byte[];
  * We get 160 bytes stack space from calling function, but only use
  * 11 * 8 byte (old backchain + r15 - r6) for storing registers.
  */
-#define STK_OFF (MAX_BPF_STACK + 8 + 4 + 4 + (160 - 11 * 8))
+#define STK_SPACE      (MAX_BPF_STACK + 8 + 4 + 4 + 160)
+#define STK_160_UNUSED (160 - 11 * 8)
+#define STK_OFF                (STK_SPACE - STK_160_UNUSED)
 #define STK_OFF_TMP    160     /* Offset of tmp buffer on stack */
 #define STK_OFF_HLEN   168     /* Offset of SKB header length on stack */