From 97cded04a9d6370ac722c6ad8e73b72c4794e851 Mon Sep 17 00:00:00 2001
From: Chunmei Xu <xuchunmei@linux.alibaba.com>
Date: Fri, 15 Jan 2021 09:51:27 +0800
Subject: [PATCH] test/test_histogram.py: fix test failed on kernel-5.10

kernel commit(cf25e24db61cc) rename tsk->real_start_time to
start_boottime, so test_hostogram will get failed on kernel>=5.5

Signed-off-by: Chunmei Xu <xuchunmei@linux.alibaba.com>
---
 tests/python/test_histogram.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/python/test_histogram.py b/tests/python/test_histogram.py
index 2fb8c1685d73..ec7950c9d5a7 100755
--- a/tests/python/test_histogram.py
+++ b/tests/python/test_histogram.py
@@ -59,10 +59,15 @@ def test_chars(self):
         b = BPF(text="""
 #include <uapi/linux/ptrace.h>
 #include <linux/sched.h>
+#include <linux/version.h>
 typedef struct { char name[TASK_COMM_LEN]; u64 slot; } Key;
 BPF_HISTOGRAM(hist1, Key, 1024);
 int kprobe__finish_task_switch(struct pt_regs *ctx, struct task_struct *prev) {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5,5,0)
     Key k = {.slot = bpf_log2l(prev->real_start_time)};
+#else
+    Key k = {.slot = bpf_log2l(prev->start_boottime)};
+#endif
     if (!bpf_get_current_comm(&k.name, sizeof(k.name)))
         hist1.increment(k);
     return 0;