Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755306Ab3CTXeg (ORCPT ); Wed, 20 Mar 2013 19:34:36 -0400 Received: from mail-pb0-f54.google.com ([209.85.160.54]:37764 "EHLO mail-pb0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754414Ab3CTXee (ORCPT ); Wed, 20 Mar 2013 19:34:34 -0400 From: Kevin Hilman To: Frederic Weisbecker , Russell King , linux-kernel@vger.kernel.org Cc: Paul McKenney , linux-arm-kernel@lists.infradead.org, linaro-kernel@lists.linaro.org Subject: [PATCH 1/3] cputime_nsecs: use math64.h for nsec resolution conversion helpers Date: Wed, 20 Mar 2013 16:34:25 -0700 Message-Id: <1363822467-6275-2-git-send-email-khilman@linaro.org> X-Mailer: git-send-email 1.8.2 In-Reply-To: <1363822467-6275-1-git-send-email-khilman@linaro.org> References: <1363822467-6275-1-git-send-email-khilman@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3504 Lines: 104 For the nsec resolution conversions to be useable on non 64-bit architectures, the helpers in need to be used so the right arch-specific 64-bit math helpers can be used (e.g. do_div()) Cc: Frederic Weisbecker Signed-off-by: Kevin Hilman --- include/asm-generic/cputime_nsecs.h | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/include/asm-generic/cputime_nsecs.h b/include/asm-generic/cputime_nsecs.h index a8ece9a..2c9e62c 100644 --- a/include/asm-generic/cputime_nsecs.h +++ b/include/asm-generic/cputime_nsecs.h @@ -16,21 +16,27 @@ #ifndef _ASM_GENERIC_CPUTIME_NSECS_H #define _ASM_GENERIC_CPUTIME_NSECS_H +#include + typedef u64 __nocast cputime_t; typedef u64 __nocast cputime64_t; #define cputime_one_jiffy jiffies_to_cputime(1) +#define cputime_div(__ct, divisor) div_u64((__force u64)__ct, divisor) +#define cputime_div_rem(__ct, divisor, remainder) \ + div_u64_rem((__force u64)__ct, divisor, remainder); + /* * Convert cputime <-> jiffies (HZ) */ #define cputime_to_jiffies(__ct) \ - ((__force u64)(__ct) / (NSEC_PER_SEC / HZ)) + cputime_div(__ct, NSEC_PER_SEC / HZ) #define cputime_to_scaled(__ct) (__ct) #define jiffies_to_cputime(__jif) \ (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ)) #define cputime64_to_jiffies64(__ct) \ - ((__force u64)(__ct) / (NSEC_PER_SEC / HZ)) + cputime_div(__ct, NSEC_PER_SEC / HZ) #define jiffies64_to_cputime64(__jif) \ (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ)) @@ -45,7 +51,7 @@ typedef u64 __nocast cputime64_t; * Convert cputime <-> microseconds */ #define cputime_to_usecs(__ct) \ - ((__force u64)(__ct) / NSEC_PER_USEC) + cputime_div(__ct, NSEC_PER_USEC) #define usecs_to_cputime(__usecs) \ (__force cputime_t)((__usecs) * NSEC_PER_USEC) #define usecs_to_cputime64(__usecs) \ @@ -55,7 +61,7 @@ typedef u64 __nocast cputime64_t; * Convert cputime <-> seconds */ #define cputime_to_secs(__ct) \ - ((__force u64)(__ct) / NSEC_PER_SEC) + cputime_div(__ct, NSEC_PER_SEC) #define secs_to_cputime(__secs) \ (__force cputime_t)((__secs) * NSEC_PER_SEC) @@ -69,8 +75,10 @@ static inline cputime_t timespec_to_cputime(const struct timespec *val) } static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val) { - val->tv_sec = (__force u64) ct / NSEC_PER_SEC; - val->tv_nsec = (__force u64) ct % NSEC_PER_SEC; + u32 rem; + + val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem); + val->tv_nsec = rem; } /* @@ -83,15 +91,17 @@ static inline cputime_t timeval_to_cputime(const struct timeval *val) } static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val) { - val->tv_sec = (__force u64) ct / NSEC_PER_SEC; - val->tv_usec = ((__force u64) ct % NSEC_PER_SEC) / NSEC_PER_USEC; + u32 rem; + + val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem); + val->tv_usec = rem / NSEC_PER_USEC; } /* * Convert cputime <-> clock (USER_HZ) */ #define cputime_to_clock_t(__ct) \ - ((__force u64)(__ct) / (NSEC_PER_SEC / USER_HZ)) + cputime_div(__ct, (NSEC_PER_SEC / USER_HZ)) #define clock_t_to_cputime(__x) \ (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ)) -- 1.8.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/