From: Heiko Carstens Date: Thu, 26 Mar 2009 14:23:53 +0000 (+0100) Subject: [S390] cputime: initialize per thread timer values on fork X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5168ce2c647f02756803bef7b74906f485491a1c;p=linux-beck.git [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 Signed-off-by: Martin Schwidefsky --- diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index e0563baa1cfe..e6b480625cb3 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -163,6 +163,7 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp, unsigned long unused, struct task_struct *p, struct pt_regs *regs) { + struct thread_info *ti; struct fake_frame { struct stack_frame sf; @@ -214,6 +215,10 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long new_stackp, p->thread.mm_segment = get_fs(); /* Don't copy debug registers */ memset(&p->thread.per_info, 0, sizeof(p->thread.per_info)); + /* Initialize per thread user and system timer values */ + ti = task_thread_info(p); + ti->user_timer = 0; + ti->system_timer = 0; return 0; }