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s390: translate cputime magic constants to macros 

Make the code more self-explanatory by naming magic constants.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Frederic Weisbecker 2014-11-28 19:23:35 +01:00 committed by Martin Schwidefsky
parent 1ce2180498
commit 8461b63ca0
1 changed files with 24 additions and 22 deletions
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46
arch/s390/include/asm/cputime.h
View File

@ -10,6 +10,8 @@
#include <linux/types.h>
#include <asm/div64.h>
#define CPUTIME_PER_USEC 4096ULL
#define CPUTIME_PER_SEC (CPUTIME_PER_USEC * USEC_PER_SEC)
/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
@ -38,24 +40,24 @@ static inline unsigned long __div(unsigned long long n, unsigned long base)
*/
static inline unsigned long cputime_to_jiffies(const cputime_t cputime)
{
return __div((__force unsigned long long) cputime, 4096000000ULL / HZ);
return __div((__force unsigned long long) cputime, CPUTIME_PER_SEC / HZ);
}
static inline cputime_t jiffies_to_cputime(const unsigned int jif)
{
return (__force cputime_t)(jif * (4096000000ULL / HZ));
return (__force cputime_t)(jif * (CPUTIME_PER_SEC / HZ));
}
static inline u64 cputime64_to_jiffies64(cputime64_t cputime)
{
unsigned long long jif = (__force unsigned long long) cputime;
do_div(jif, 4096000000ULL / HZ);
do_div(jif, CPUTIME_PER_SEC / HZ);
return jif;
}
static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
{
return (__force cputime64_t)(jif * (4096000000ULL / HZ));
return (__force cputime64_t)(jif * (CPUTIME_PER_SEC / HZ));
}
/*
@ -68,7 +70,7 @@ static inline unsigned int cputime_to_usecs(const cputime_t cputime)
static inline cputime_t usecs_to_cputime(const unsigned int m)
{
return (__force cputime_t)(m * 4096ULL);
return (__force cputime_t)(m * CPUTIME_PER_USEC);
}
#define usecs_to_cputime64(m) usecs_to_cputime(m)
@ -78,12 +80,12 @@ static inline cputime_t usecs_to_cputime(const unsigned int m)
*/
static inline unsigned int cputime_to_secs(const cputime_t cputime)
{
return __div((__force unsigned long long) cputime, 2048000000) >> 1;
return __div((__force unsigned long long) cputime, CPUTIME_PER_SEC / 2) >> 1;
}
static inline cputime_t secs_to_cputime(const unsigned int s)
{
return (__force cputime_t)(s * 4096000000ULL);
return (__force cputime_t)(s * CPUTIME_PER_SEC);
}
/*
@ -91,8 +93,8 @@ static inline cputime_t secs_to_cputime(const unsigned int s)
*/
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);
unsigned long long ret = value->tv_sec * CPUTIME_PER_SEC;
return (__force cputime_t)(ret + (value->tv_nsec * CPUTIME_PER_USEC) / NSEC_PER_USEC);
}
static inline void cputime_to_timespec(const cputime_t cputime,
@ -103,12 +105,12 @@ static inline void cputime_to_timespec(const cputime_t cputime,
register_pair rp;
rp.pair = __cputime >> 1;
asm ("dr %0,%1" : "+d" (rp) : "d" (2048000000UL));
value->tv_nsec = rp.subreg.even * 1000 / 4096;
asm ("dr %0,%1" : "+d" (rp) : "d" (CPUTIME_PER_SEC / 2));
value->tv_nsec = rp.subreg.even * NSEC_PER_USEC / CPUTIME_PER_USEC;
value->tv_sec = rp.subreg.odd;
#else
value->tv_nsec = (__cputime % 4096000000ULL) * 1000 / 4096;
value->tv_sec = __cputime / 4096000000ULL;
value->tv_nsec = (__cputime % CPUTIME_PER_SEC) * NSEC_PER_USEC / CPUTIME_PER_USEC;
value->tv_sec = __cputime / CPUTIME_PER_SEC;
#endif
}
@ -119,8 +121,8 @@ static inline void cputime_to_timespec(const cputime_t cputime,
*/
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);
unsigned long long ret = value->tv_sec * CPUTIME_PER_SEC;
return (__force cputime_t)(ret + value->tv_usec * CPUTIME_PER_USEC);
}
static inline void cputime_to_timeval(const cputime_t cputime,
@ -131,12 +133,12 @@ static inline void cputime_to_timeval(const cputime_t cputime,
register_pair rp;
rp.pair = __cputime >> 1;
asm ("dr %0,%1" : "+d" (rp) : "d" (2048000000UL));
value->tv_usec = rp.subreg.even / 4096;
asm ("dr %0,%1" : "+d" (rp) : "d" (CPUTIME_PER_USEC / 2));
value->tv_usec = rp.subreg.even / CPUTIME_PER_USEC;
value->tv_sec = rp.subreg.odd;
#else
value->tv_usec = (__cputime % 4096000000ULL) / 4096;
value->tv_sec = __cputime / 4096000000ULL;
value->tv_usec = (__cputime % CPUTIME_PER_SEC) / CPUTIME_PER_USEC;
value->tv_sec = __cputime / CPUTIME_PER_SEC;
#endif
}
@ -146,13 +148,13 @@ static inline void cputime_to_timeval(const cputime_t cputime,
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);
do_div(clock, CPUTIME_PER_SEC / USER_HZ);
return clock;
}
static inline cputime_t clock_t_to_cputime(unsigned long x)
{
return (__force cputime_t)(x * (4096000000ULL / USER_HZ));
return (__force cputime_t)(x * (CPUTIME_PER_SEC / USER_HZ));
}
/*
@ -161,7 +163,7 @@ static inline cputime_t clock_t_to_cputime(unsigned long x)
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);
do_div(clock, CPUTIME_PER_SEC / USER_HZ);
return clock;
}