[PATCH 30/37] ia64: Convert vtime to use nsec units directly

From: Frederic Weisbecker
Date: Sun Jan 22 2017 - 13:27:11 EST


There is no need anymore for this cputime_t midlayer. Let's use nsec
units directly.

Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Cc: Wanpeng Li <wanpeng.li@xxxxxxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
---
arch/ia64/kernel/head.S | 4 ++--
arch/ia64/kernel/time.c | 14 +++++++-------
2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index c9b5e94..3204fdd 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -1031,7 +1031,7 @@ GLOBAL_ENTRY(ia64_native_sched_clock)
END(ia64_native_sched_clock)

#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
-GLOBAL_ENTRY(cycle_to_cputime)
+GLOBAL_ENTRY(cycle_to_nsec)
alloc r16=ar.pfs,1,0,0,0
addl r8=THIS_CPU(ia64_cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
;;
@@ -1047,7 +1047,7 @@ GLOBAL_ENTRY(cycle_to_cputime)
;;
shrp r8=r9,r8,IA64_NSEC_PER_CYC_SHIFT
br.ret.sptk.many rp
-END(cycle_to_cputime)
+END(cycle_to_nsec)
#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */

#ifdef CONFIG_IA64_BRL_EMU
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index f15bca4..faa1168 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -60,7 +60,7 @@ static struct clocksource *itc_clocksource;

#include <linux/kernel_stat.h>

-extern cputime_t cycle_to_cputime(u64 cyc);
+extern u64 cycle_to_nsec(u64 cyc);

void vtime_flush(struct task_struct *tsk)
{
@@ -68,26 +68,26 @@ void vtime_flush(struct task_struct *tsk)
u64 delta;

if (ti->utime)
- account_user_time(tsk, cputime_to_nsecs(cycle_to_cputime(ti->utime)));
+ account_user_time(tsk, cycle_to_nsec(ti->utime));

if (ti->gtime)
- account_guest_time(tsk, cputime_to_nsecs(cycle_to_cputime(ti->gtime)));
+ account_guest_time(tsk, cycle_to_nsec(ti->gtime));

if (ti->idle_time)
- account_idle_time(cputime_to_nsecs(cycle_to_cputime(ti->idle_time)));
+ account_idle_time(cycle_to_nsec(ti->idle_time));

if (ti->stime) {
- delta = cputime_to_nsecs(cycle_to_cputime(ti->stime));
+ delta = cycle_to_nsec(ti->stime);
account_system_index_time(tsk, delta, CPUTIME_SYSTEM);
}

if (ti->hardirq_time) {
- delta = cputime_to_nsecs(cycle_to_cputime(ti->hardirq_time));
+ delta = cycle_to_nsec(ti->hardirq_time);
account_system_index_time(tsk, delta, CPUTIME_IRQ);
}

if (ti->softirq_time) {
- delta = cputime_to_nsecs(cycle_to_cputime(ti->softirq_time));
+ delta = cycle_to_nsec(ti->softirq_time));
account_system_index_time(tsk, delta, CPUTIME_SOFTIRQ);
}

--
2.7.4