Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/samples/bpf/tracex5_kern.c b/samples/bpf/tracex5_kern.c
index f57f4e1..35cb0ee 100644
--- a/samples/bpf/tracex5_kern.c
+++ b/samples/bpf/tracex5_kern.c
@@ -68,12 +68,25 @@
 	return 0;
 }
 
-PROG(SYS__NR_mmap)(struct pt_regs *ctx)
+#ifdef __NR_mmap2
+PROG(SYS__NR_mmap2)(struct pt_regs *ctx)
 {
-	char fmt[] = "mmap\n";
+	char fmt[] = "mmap2\n";
+
 	bpf_trace_printk(fmt, sizeof(fmt));
 	return 0;
 }
+#endif
+
+#ifdef __NR_mmap
+PROG(SYS__NR_mmap)(struct pt_regs *ctx)
+{
+	char fmt[] = "mmap\n";
+
+	bpf_trace_printk(fmt, sizeof(fmt));
+	return 0;
+}
+#endif
 
 char _license[] SEC("license") = "GPL";
 u32 _version SEC("version") = LINUX_VERSION_CODE;