forked from luck/tmp_suning_uos_patched
347abad981
On 32 bit systems cmpxchg cannot handle 64 bit values, so some additional magic is required to allow a 32 bit system with CONFIG_VIRT_CPU_ACCOUNTING_GEN=y enabled to build. Make sure the correct cmpxchg function is used when doing an atomic swap of a cputime_t. Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rik van Riel <riel@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: umgwanakikbuti@gmail.com Cc: fweisbec@gmail.com Cc: srao@redhat.com Cc: lwoodman@redhat.com Cc: atheurer@redhat.com Cc: oleg@redhat.com Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> 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: linux390@de.ibm.com Cc: linux-arch@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-s390@vger.kernel.org Link: http://lkml.kernel.org/r/20140930155947.070cdb1f@annuminas.surriel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
120 lines
3.1 KiB
C
120 lines
3.1 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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#include <linux/math64.h>
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typedef u64 __nocast cputime_t;
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typedef u64 __nocast cputime64_t;
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#define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
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#define cputime_one_jiffy jiffies_to_cputime(1)
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#define cputime_div(__ct, divisor) div_u64((__force u64)__ct, divisor)
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#define cputime_div_rem(__ct, divisor, remainder) \
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div_u64_rem((__force u64)__ct, divisor, remainder);
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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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cputime_div(__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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cputime_div(__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 cputime_to_nsecs(__ct) \
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(__force u64)(__ct)
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#define nsecs_to_cputime(__nsecs) \
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(__force cputime_t)(__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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cputime_div(__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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cputime_div(__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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u32 rem;
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val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
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val->tv_nsec = rem;
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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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u32 rem;
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val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
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val->tv_usec = rem / 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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cputime_div(__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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