From 609320c8a22715b74b39796930c3542719f8ab62 Mon Sep 17 00:00:00 2001
From: Yonghong Song <yhs@fb.com>
Date: Thu, 7 Sep 2017 18:36:15 -0700
Subject: perf/bpf: fix a clang compilation issue

clang does not support variable length array for structure member.
It has the following error during compilation:

kernel/trace/trace_syscalls.c:568:17: error: fields must have a constant size:
'variable length array in structure' extension will never be supported
                unsigned long args[sys_data->nb_args];
                              ^

The fix is to use a fixed array length instead.

Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 kernel/trace/trace_syscalls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'kernel')

diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 9c4eef20301c..696afe72d3b1 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -565,7 +565,7 @@ static int perf_call_bpf_enter(struct bpf_prog *prog, struct pt_regs *regs,
 	struct syscall_tp_t {
 		unsigned long long regs;
 		unsigned long syscall_nr;
-		unsigned long args[sys_data->nb_args];
+		unsigned long args[SYSCALL_DEFINE_MAXARGS];
 	} param;
 	int i;
 
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