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 <[email protected]>
drcwr · Jan 15, 2021 · 97cded0 · 97cded0
1 parent 2b97264
commit 97cded0
Showing 1 changed file with 5 additions and 0 deletions.
diff --git 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;