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perf/bpf: fix a clang compilation issue

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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>
This commit is contained in:
Yonghong Song
2017-09-07 18:36:15 -07:00
committed by David S. Miller
parent c6644d07ef
commit 609320c8a2
2 changed files with 3 additions and 1 deletions
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2
kernel/trace/trace_syscalls.c
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@@ -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;