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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2016-11-08 12:15:59 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-11-11 16:37:43 +0100
commit90c53e65806323382e8bff212cc993700a4a62d9 (patch)
tree0b18ee9b2fbfb5151ffbd4eb333a96e97f7f8f49 /arch/s390/kernel/vtime.c
parents390: move system_call field from thread_info to thread_struct (diff)
downloadlinux-90c53e65806323382e8bff212cc993700a4a62d9.tar.xz
linux-90c53e65806323382e8bff212cc993700a4a62d9.zip
s390: move cputime accounting fields from thread_info to thread_struct
The user_timer and system_timer fields are used for the per-thread cputime accounting code. The access to these values is simpler if they are moved to the thread_struct as the task_thread_info(tsk) indirection is not needed anymore. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/vtime.c')
-rw-r--r--arch/s390/kernel/vtime.c26
1 files changed, 10 insertions, 16 deletions
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 856e30d8463f..9a6c95761ad2 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -96,7 +96,6 @@ static void update_mt_scaling(void)
*/
static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
{
- struct thread_info *ti = task_thread_info(tsk);
u64 timer, clock, user, system, steal;
u64 user_scaled, system_scaled;
@@ -119,13 +118,13 @@ static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
time_after64(jiffies_64, this_cpu_read(mt_scaling_jiffies)))
update_mt_scaling();
- user = S390_lowcore.user_timer - ti->user_timer;
+ user = S390_lowcore.user_timer - tsk->thread.user_timer;
S390_lowcore.steal_timer -= user;
- ti->user_timer = S390_lowcore.user_timer;
+ tsk->thread.user_timer = S390_lowcore.user_timer;
- system = S390_lowcore.system_timer - ti->system_timer;
+ system = S390_lowcore.system_timer - tsk->thread.system_timer;
S390_lowcore.steal_timer -= system;
- ti->system_timer = S390_lowcore.system_timer;
+ tsk->thread.system_timer = S390_lowcore.system_timer;
user_scaled = user;
system_scaled = system;
@@ -151,15 +150,11 @@ static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
void vtime_task_switch(struct task_struct *prev)
{
- struct thread_info *ti;
-
do_account_vtime(prev, 0);
- ti = task_thread_info(prev);
- ti->user_timer = S390_lowcore.user_timer;
- ti->system_timer = S390_lowcore.system_timer;
- ti = task_thread_info(current);
- S390_lowcore.user_timer = ti->user_timer;
- S390_lowcore.system_timer = ti->system_timer;
+ prev->thread.user_timer = S390_lowcore.user_timer;
+ prev->thread.system_timer = S390_lowcore.system_timer;
+ S390_lowcore.user_timer = current->thread.user_timer;
+ S390_lowcore.system_timer = current->thread.system_timer;
}
/*
@@ -179,7 +174,6 @@ void vtime_account_user(struct task_struct *tsk)
*/
void vtime_account_irq_enter(struct task_struct *tsk)
{
- struct thread_info *ti = task_thread_info(tsk);
u64 timer, system, system_scaled;
timer = S390_lowcore.last_update_timer;
@@ -191,9 +185,9 @@ void vtime_account_irq_enter(struct task_struct *tsk)
time_after64(jiffies_64, this_cpu_read(mt_scaling_jiffies)))
update_mt_scaling();
- system = S390_lowcore.system_timer - ti->system_timer;
+ system = S390_lowcore.system_timer - tsk->thread.system_timer;
S390_lowcore.steal_timer -= system;
- ti->system_timer = S390_lowcore.system_timer;
+ tsk->thread.system_timer = S390_lowcore.system_timer;
system_scaled = system;
/* Do MT utilization scaling */
if (smp_cpu_mtid) {