From d4bae8390a23595c3507e7870bba4fe7b0700f0f Mon Sep 17 00:00:00 2001
From: Seung-Woo Kim <sw0312.kim@samsung.com>
Date: Fri, 11 Dec 2020 13:21:38 +0900
Subject: [PATCH] Support Linux kernel earilier version than v4.11

From Linux kernel 4.11, sched header is splited and cputime_t is
fixed as u64. Before the kernel version, do not use splitter
headers and use cputime_t for task_cputime_adjusted().

Change-Id: Iac5d4e1d89366c54a59cc3092afd56f2df01918b
Ref: v4.11 commit 1050b27c52f6 ("sched/headers: Move cputime functionality from <linux/sched.h> and <linux/cputime.h> into <linux/sched/cputime.h>")
Ref: v4.11 commit c3edc4010e9d ("sched/headers: Move task_struct::signal and task_struct::sighand types and accessors into <linux/sched/signal.h>")
Ref: v4.11 commit 5613fda9a503 ("sched/cputime: Convert task/group cputime to nsecs")
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
---
 kernel/proc-tsm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/kernel/proc-tsm.c b/kernel/proc-tsm.c
index 3f25335..74cc11b 100644
--- a/kernel/proc-tsm.c
+++ b/kernel/proc-tsm.c
@@ -27,8 +27,10 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/sched.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
 #include <linux/sched/signal.h>
 #include <linux/sched/cputime.h>
+#endif
 #include <linux/mm.h>
 #include <linux/pid_namespace.h>
 #include <asm/uaccess.h>
@@ -61,11 +63,13 @@ static u64 time_now(void)
     return div64_ul(ktime_get_boot_ns(), NSEC_PER_USEC);
 }
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
 static inline u64 cputime_to_usecs(const u64 cputime)
 {
     // return cputime >> 12;
     return div64_ul(cputime, NSEC_PER_USEC);
 }
+#endif
 
 static unsigned int count_open_files(struct files_struct *files)
 {
@@ -101,7 +105,11 @@ static int stability_monitor_show(struct seq_file *m, void *v)
     struct task_struct *task, *t;
     struct pid *pid = NULL;
     pid_t ppid = 0;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
     u64 uptime, utime, stime, ut, st;
+#else
+    cputime_t uptime, utime, stime, ut, st;
+#endif
     unsigned long long vm_rss, total_ram;
     struct task_io_accounting task_ioac;
     unsigned int open_fds;
-- 
2.34.1