Doug / smarc-fsl-linux-kernel

Download as
Browse Code ยป

Commit 5168ce2c647f02756803bef7b74906f485491a1c

Authored by Heiko Carstens
Committed by Martin Schwidefsky
1 parent cbdc229245
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

[S390] cputime: initialize per thread timer values on fork 

Initialize per thread timer values instead of just copying them from
the parent. That way it is easily possible to tell how much time a
thread spent in user/system context.
Doesn't fix a bug, this is just for debugging purposes.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

Showing 1 changed file with 5 additions and 0 deletions Side-by-side Diff

arch/s390/kernel/process.c
Diff comments   View file @ 5168ce2
... ... @@ -163,6 +163,7 @@
163 163 unsigned long unused,
164 164 struct task_struct *p, struct pt_regs *regs)
165 165 {
  166 + struct thread_info *ti;
166 167 struct fake_frame
167 168 {
168 169 struct stack_frame sf;
... ... @@ -214,6 +215,10 @@
214 215 p->thread.mm_segment = get_fs();
215 216 /* Don't copy debug registers */
216 217 memset(&p->thread.per_info, 0, sizeof(p->thread.per_info));
  218 + /* Initialize per thread user and system timer values */
  219 + ti = task_thread_info(p);
  220 + ti->user_timer = 0;
  221 + ti->system_timer = 0;
217 222 return 0;
218 223 }
219 224