Perf BPF prologue generator unconditionally fetches 8 bytes for function
parameters. On big endian machine, a casting is resquired if the parameter
is not u64.
Signed-off-by: Wang Nan <wangn...@huawei.com>
Cc: Arnaldo Carvalho de Melo <a...@kernel.org>
Cc: Thomas Richter <tmri...@linux.vnet.ibm.com>
Cc: Alexei Starovoitov <alexei.starovoi...@gmail.com>
Cc: Hendrik Brueckner <brueck...@linux.vnet.ibm.com>
Cc: Li Zefan <lize...@huawei.com>
---
tools/perf/tests/bpf-script-test-prologue.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/perf/tests/bpf-script-test-prologue.c
b/tools/perf/tests/bpf-script-test-prologue.c
index b4ebc75..43f1e16 100644
--- a/tools/perf/tests/bpf-script-test-prologue.c
+++ b/tools/perf/tests/bpf-script-test-prologue.c
@@ -26,9 +26,11 @@ static void (*bpf_trace_printk)(const char *fmt, int
fmt_size, ...) =
(void *) 6;
SEC("func=null_lseek file->f_mode offset orig")
-int bpf_func__null_lseek(void *ctx, int err, unsigned long f_mode,
+int bpf_func__null_lseek(void *ctx, int err, unsigned long _f_mode,
unsigned long offset, unsigned long orig)
{
+ fmode_t f_mode = (fmode_t)_f_mode;
+
if (err)
return 0;
if (f_mode & FMODE_WRITE)
--
2.10.1
