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powerpc, sched/cputime: Remove unused cputime definitions
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Since the core doesn't deal with cputime_t anymore, most of these APIs
have been left unused. Lets remove these.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1485832191-26889-33-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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fweisbec authored and Ingo Molnar committed Feb 1, 2017
1 parent 42b425b commit e7f340c
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Showing 2 changed files with 2 additions and 191 deletions.
173 changes: 0 additions & 173 deletions arch/powerpc/include/asm/cputime.h
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Original file line number Diff line number Diff line change
Expand Up @@ -18,9 +18,6 @@

#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
#include <asm-generic/cputime.h>
#ifdef __KERNEL__
static inline void setup_cputime_one_jiffy(void) { }
#endif
#else

#include <linux/types.h>
Expand All @@ -36,65 +33,6 @@ typedef u64 __nocast cputime64_t;
#define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new)

#ifdef __KERNEL__

/*
* One jiffy in timebase units computed during initialization
*/
extern cputime_t cputime_one_jiffy;

/*
* Convert cputime <-> jiffies
*/
extern u64 __cputime_jiffies_factor;

static inline unsigned long cputime_to_jiffies(const cputime_t ct)
{
return mulhdu((__force u64) ct, __cputime_jiffies_factor);
}

static inline cputime_t jiffies_to_cputime(const unsigned long jif)
{
u64 ct;
unsigned long sec;

/* have to be a little careful about overflow */
ct = jif % HZ;
sec = jif / HZ;
if (ct) {
ct *= tb_ticks_per_sec;
do_div(ct, HZ);
}
if (sec)
ct += (cputime_t) sec * tb_ticks_per_sec;
return (__force cputime_t) ct;
}

static inline void setup_cputime_one_jiffy(void)
{
cputime_one_jiffy = jiffies_to_cputime(1);
}

static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
{
u64 ct;
u64 sec = jif;

/* have to be a little careful about overflow */
ct = do_div(sec, HZ);
if (ct) {
ct *= tb_ticks_per_sec;
do_div(ct, HZ);
}
if (sec)
ct += (u64) sec * tb_ticks_per_sec;
return (__force cputime64_t) ct;
}

static inline u64 cputime64_to_jiffies64(const cputime_t ct)
{
return mulhdu((__force u64) ct, __cputime_jiffies_factor);
}

/*
* Convert cputime <-> microseconds
*/
Expand All @@ -105,117 +43,6 @@ static inline unsigned long cputime_to_usecs(const cputime_t ct)
return mulhdu((__force u64) ct, __cputime_usec_factor);
}

static inline cputime_t usecs_to_cputime(const unsigned long us)
{
u64 ct;
unsigned long sec;

/* have to be a little careful about overflow */
ct = us % 1000000;
sec = us / 1000000;
if (ct) {
ct *= tb_ticks_per_sec;
do_div(ct, 1000000);
}
if (sec)
ct += (cputime_t) sec * tb_ticks_per_sec;
return (__force cputime_t) ct;
}

#define usecs_to_cputime64(us) usecs_to_cputime(us)

/*
* Convert cputime <-> seconds
*/
extern u64 __cputime_sec_factor;

static inline unsigned long cputime_to_secs(const cputime_t ct)
{
return mulhdu((__force u64) ct, __cputime_sec_factor);
}

static inline cputime_t secs_to_cputime(const unsigned long sec)
{
return (__force cputime_t)((u64) sec * tb_ticks_per_sec);
}

/*
* Convert cputime <-> timespec
*/
static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
{
u64 x = (__force u64) ct;
unsigned int frac;

frac = do_div(x, tb_ticks_per_sec);
p->tv_sec = x;
x = (u64) frac * 1000000000;
do_div(x, tb_ticks_per_sec);
p->tv_nsec = x;
}

static inline cputime_t timespec_to_cputime(const struct timespec *p)
{
u64 ct;

ct = (u64) p->tv_nsec * tb_ticks_per_sec;
do_div(ct, 1000000000);
return (__force cputime_t)(ct + (u64) p->tv_sec * tb_ticks_per_sec);
}

/*
* Convert cputime <-> timeval
*/
static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p)
{
u64 x = (__force u64) ct;
unsigned int frac;

frac = do_div(x, tb_ticks_per_sec);
p->tv_sec = x;
x = (u64) frac * 1000000;
do_div(x, tb_ticks_per_sec);
p->tv_usec = x;
}

static inline cputime_t timeval_to_cputime(const struct timeval *p)
{
u64 ct;

ct = (u64) p->tv_usec * tb_ticks_per_sec;
do_div(ct, 1000000);
return (__force cputime_t)(ct + (u64) p->tv_sec * tb_ticks_per_sec);
}

/*
* Convert cputime <-> clock_t (units of 1/USER_HZ seconds)
*/
extern u64 __cputime_clockt_factor;

static inline unsigned long cputime_to_clock_t(const cputime_t ct)
{
return mulhdu((__force u64) ct, __cputime_clockt_factor);
}

static inline cputime_t clock_t_to_cputime(const unsigned long clk)
{
u64 ct;
unsigned long sec;

/* have to be a little careful about overflow */
ct = clk % USER_HZ;
sec = clk / USER_HZ;
if (ct) {
ct *= tb_ticks_per_sec;
do_div(ct, USER_HZ);
}
if (sec)
ct += (u64) sec * tb_ticks_per_sec;
return (__force cputime_t) ct;
}

#define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct))

/*
* PPC64 uses PACA which is task independent for storing accounting data while
* PPC32 uses struct thread_info, therefore at task switch the accounting data
Expand Down
20 changes: 2 additions & 18 deletions arch/powerpc/kernel/time.c
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Original file line number Diff line number Diff line change
Expand Up @@ -152,20 +152,11 @@ EXPORT_SYMBOL_GPL(ppc_tb_freq);

#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
/*
* Factors for converting from cputime_t (timebase ticks) to
* jiffies, microseconds, seconds, and clock_t (1/USER_HZ seconds).
* These are all stored as 0.64 fixed-point binary fractions.
* Factor for converting from cputime_t (timebase ticks) to
* microseconds. This is stored as 0.64 fixed-point binary fraction.
*/
u64 __cputime_jiffies_factor;
EXPORT_SYMBOL(__cputime_jiffies_factor);
u64 __cputime_usec_factor;
EXPORT_SYMBOL(__cputime_usec_factor);
u64 __cputime_sec_factor;
EXPORT_SYMBOL(__cputime_sec_factor);
u64 __cputime_clockt_factor;
EXPORT_SYMBOL(__cputime_clockt_factor);

cputime_t cputime_one_jiffy;

#ifdef CONFIG_PPC_SPLPAR
void (*dtl_consumer)(struct dtl_entry *, u64);
Expand All @@ -181,14 +172,8 @@ static void calc_cputime_factors(void)
{
struct div_result res;

div128_by_32(HZ, 0, tb_ticks_per_sec, &res);
__cputime_jiffies_factor = res.result_low;
div128_by_32(1000000, 0, tb_ticks_per_sec, &res);
__cputime_usec_factor = res.result_low;
div128_by_32(1, 0, tb_ticks_per_sec, &res);
__cputime_sec_factor = res.result_low;
div128_by_32(USER_HZ, 0, tb_ticks_per_sec, &res);
__cputime_clockt_factor = res.result_low;
}

/*
Expand Down Expand Up @@ -1053,7 +1038,6 @@ void __init time_init(void)
tb_ticks_per_sec = ppc_tb_freq;
tb_ticks_per_usec = ppc_tb_freq / 1000000;
calc_cputime_factors();
setup_cputime_one_jiffy();

/*
* Compute scale factor for sched_clock.
Expand Down

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