1 files changed, 5 insertions, 179 deletions

diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index d2ff41370c0c..30bb3ec4e5fc 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  *  Copyright IBM Corp. 2004
  *
@@ -8,188 +9,13 @@
 #define _S390_CPUTIME_H
 
 #include <linux/types.h>
-#include <linux/percpu.h>
-#include <linux/spinlock.h>
-#include <asm/div64.h>
-
-
-#define __ARCH_HAS_VTIME_ACCOUNT
-#define __ARCH_HAS_VTIME_TASK_SWITCH
-
-/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
-
-typedef unsigned long long __nocast cputime_t;
-typedef unsigned long long __nocast cputime64_t;
-
-static inline unsigned long __div(unsigned long long n, unsigned long base)
-{
-#ifndef CONFIG_64BIT
-	register_pair rp;
-
-	rp.pair = n >> 1;
-	asm ("dr %0,%1" : "+d" (rp) : "d" (base >> 1));
-	return rp.subreg.odd;
-#else /* CONFIG_64BIT */
-	return n / base;
-#endif /* CONFIG_64BIT */
-}
-
-#define cputime_one_jiffy		jiffies_to_cputime(1)
+#include <asm/timex.h>
 
 /*
- * Convert cputime to jiffies and back.
+ * Convert cputime to nanoseconds.
  */
-static inline unsigned long cputime_to_jiffies(const cputime_t cputime)
-{
-	return __div((__force unsigned long long) cputime, 4096000000ULL / HZ);
-}
-
-static inline cputime_t jiffies_to_cputime(const unsigned int jif)
-{
-	return (__force cputime_t)(jif * (4096000000ULL / HZ));
-}
-
-static inline u64 cputime64_to_jiffies64(cputime64_t cputime)
-{
-	unsigned long long jif = (__force unsigned long long) cputime;
-	do_div(jif, 4096000000ULL / HZ);
-	return jif;
-}
-
-static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
-{
-	return (__force cputime64_t)(jif * (4096000000ULL / HZ));
-}
-
-/*
- * Convert cputime to microseconds and back.
- */
-static inline unsigned int cputime_to_usecs(const cputime_t cputime)
-{
-	return (__force unsigned long long) cputime >> 12;
-}
-
-static inline cputime_t usecs_to_cputime(const unsigned int m)
-{
-	return (__force cputime_t)(m * 4096ULL);
-}
-
-#define usecs_to_cputime64(m)		usecs_to_cputime(m)
-
-/*
- * Convert cputime to milliseconds and back.
- */
-static inline unsigned int cputime_to_secs(const cputime_t cputime)
-{
-	return __div((__force unsigned long long) cputime, 2048000000) >> 1;
-}
-
-static inline cputime_t secs_to_cputime(const unsigned int s)
-{
-	return (__force cputime_t)(s * 4096000000ULL);
-}
-
-/*
- * Convert cputime to timespec and back.
- */
-static inline cputime_t timespec_to_cputime(const struct timespec *value)
-{
-	unsigned long long ret = value->tv_sec * 4096000000ULL;
-	return (__force cputime_t)(ret + value->tv_nsec * 4096 / 1000);
-}
-
-static inline void cputime_to_timespec(const cputime_t cputime,
-				       struct timespec *value)
-{
-	unsigned long long __cputime = (__force unsigned long long) cputime;
-#ifndef CONFIG_64BIT
-	register_pair rp;
-
-	rp.pair = __cputime >> 1;
-	asm ("dr %0,%1" : "+d" (rp) : "d" (2048000000UL));
-	value->tv_nsec = rp.subreg.even * 1000 / 4096;
-	value->tv_sec = rp.subreg.odd;
-#else
-	value->tv_nsec = (__cputime % 4096000000ULL) * 1000 / 4096;
-	value->tv_sec = __cputime / 4096000000ULL;
-#endif
-}
-
-/*
- * Convert cputime to timeval and back.
- * Since cputime and timeval have the same resolution (microseconds)
- * this is easy.
- */
-static inline cputime_t timeval_to_cputime(const struct timeval *value)
-{
-	unsigned long long ret = value->tv_sec * 4096000000ULL;
-	return (__force cputime_t)(ret + value->tv_usec * 4096ULL);
-}
-
-static inline void cputime_to_timeval(const cputime_t cputime,
-				      struct timeval *value)
-{
-	unsigned long long __cputime = (__force unsigned long long) cputime;
-#ifndef CONFIG_64BIT
-	register_pair rp;
-
-	rp.pair = __cputime >> 1;
-	asm ("dr %0,%1" : "+d" (rp) : "d" (2048000000UL));
-	value->tv_usec = rp.subreg.even / 4096;
-	value->tv_sec = rp.subreg.odd;
-#else
-	value->tv_usec = (__cputime % 4096000000ULL) / 4096;
-	value->tv_sec = __cputime / 4096000000ULL;
-#endif
-}
-
-/*
- * Convert cputime to clock and back.
- */
-static inline clock_t cputime_to_clock_t(cputime_t cputime)
-{
-	unsigned long long clock = (__force unsigned long long) cputime;
-	do_div(clock, 4096000000ULL / USER_HZ);
-	return clock;
-}
-
-static inline cputime_t clock_t_to_cputime(unsigned long x)
-{
-	return (__force cputime_t)(x * (4096000000ULL / USER_HZ));
-}
-
-/*
- * Convert cputime64 to clock.
- */
-static inline clock_t cputime64_to_clock_t(cputime64_t cputime)
-{
-	unsigned long long clock = (__force unsigned long long) cputime;
-	do_div(clock, 4096000000ULL / USER_HZ);
-	return clock;
-}
-
-struct s390_idle_data {
-	int nohz_delay;
-	unsigned int sequence;
-	unsigned long long idle_count;
-	unsigned long long idle_time;
-	unsigned long long clock_idle_enter;
-	unsigned long long clock_idle_exit;
-	unsigned long long timer_idle_enter;
-	unsigned long long timer_idle_exit;
-};
-
-DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
-
-cputime64_t s390_get_idle_time(int cpu);
-
-#define arch_idle_time(cpu) s390_get_idle_time(cpu)
-
-static inline int s390_nohz_delay(int cpu)
-{
-	return __get_cpu_var(s390_idle).nohz_delay != 0;
-}
+#define cputime_to_nsecs(cputime) tod_to_ns(cputime)
 
-#define arch_needs_cpu(cpu) s390_nohz_delay(cpu)
+void account_idle_time_irq(void);
 
 #endif /* _S390_CPUTIME_H */