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c78a4bcd1a
Saw the following compiler warning on the linux-next tree: kernel/itimer.c: In function 'set_cpu_itimer': kernel/itimer.c:152:2: warning: passing argument 1 of 'timeval_to_cputime' discards 'const' qualifier from pointer target type [enabled by default] ... timeval_to_cputime() is always passed a constant timeval in argument, we need to teach the nsecs based cputime implementation about that. Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Kevin Hilman <khilman@linaro.org> Link: http://lkml.kernel.org/r/1361636925-22288-2-git-send-email-fweisbec@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Kevin Hilman <khilman@linaro.org>
105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/*
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* Definitions for measuring cputime in nsecs resolution.
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*
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* Based on <arch/ia64/include/asm/cputime.h>
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*
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* Copyright (C) 2007 FUJITSU LIMITED
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* Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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#ifndef _ASM_GENERIC_CPUTIME_NSECS_H
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#define _ASM_GENERIC_CPUTIME_NSECS_H
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typedef u64 __nocast cputime_t;
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typedef u64 __nocast cputime64_t;
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#define cputime_one_jiffy jiffies_to_cputime(1)
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/*
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* Convert cputime <-> jiffies (HZ)
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*/
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#define cputime_to_jiffies(__ct) \
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((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
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#define cputime_to_scaled(__ct) (__ct)
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#define jiffies_to_cputime(__jif) \
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(__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
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#define cputime64_to_jiffies64(__ct) \
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((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
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#define jiffies64_to_cputime64(__jif) \
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(__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
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/*
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* Convert cputime <-> nanoseconds
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*/
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#define nsecs_to_cputime(__nsecs) ((__force u64)(__nsecs))
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/*
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* Convert cputime <-> microseconds
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*/
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#define cputime_to_usecs(__ct) \
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((__force u64)(__ct) / NSEC_PER_USEC)
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#define usecs_to_cputime(__usecs) \
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(__force cputime_t)((__usecs) * NSEC_PER_USEC)
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#define usecs_to_cputime64(__usecs) \
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(__force cputime64_t)((__usecs) * NSEC_PER_USEC)
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/*
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* Convert cputime <-> seconds
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*/
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#define cputime_to_secs(__ct) \
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((__force u64)(__ct) / NSEC_PER_SEC)
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#define secs_to_cputime(__secs) \
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(__force cputime_t)((__secs) * NSEC_PER_SEC)
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/*
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* Convert cputime <-> timespec (nsec)
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*/
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static inline cputime_t timespec_to_cputime(const struct timespec *val)
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{
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u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
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return (__force cputime_t) ret;
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}
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static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
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{
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val->tv_sec = (__force u64) ct / NSEC_PER_SEC;
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val->tv_nsec = (__force u64) ct % NSEC_PER_SEC;
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}
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/*
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* Convert cputime <-> timeval (msec)
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*/
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static inline cputime_t timeval_to_cputime(const struct timeval *val)
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{
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u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_usec * NSEC_PER_USEC;
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return (__force cputime_t) ret;
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}
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static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
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{
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val->tv_sec = (__force u64) ct / NSEC_PER_SEC;
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val->tv_usec = ((__force u64) ct % NSEC_PER_SEC) / NSEC_PER_USEC;
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}
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/*
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* Convert cputime <-> clock (USER_HZ)
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*/
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#define cputime_to_clock_t(__ct) \
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((__force u64)(__ct) / (NSEC_PER_SEC / USER_HZ))
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#define clock_t_to_cputime(__x) \
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(__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
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/*
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* Convert cputime64 to clock.
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*/
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#define cputime64_to_clock_t(__ct) \
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cputime_to_clock_t((__force cputime_t)__ct)
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#endif
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