From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752285AbeESMBA (ORCPT ); Sat, 19 May 2018 08:01:00 -0400 Received: from terminus.zytor.com ([198.137.202.136]:36215 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752153AbeESMA6 (ORCPT ); Sat, 19 May 2018 08:00:58 -0400 Date: Sat, 19 May 2018 05:00:45 -0700 From: tip-bot for Arnd Bergmann Message-ID: Cc: tglx@linutronix.de, linux-kernel@vger.kernel.org, john.stultz@linaro.org, arnd@arndb.de, mingo@kernel.org, hpa@zytor.com, sboyd@kernel.org Reply-To: arnd@arndb.de, hpa@zytor.com, mingo@kernel.org, sboyd@kernel.org, tglx@linutronix.de, linux-kernel@vger.kernel.org, john.stultz@linaro.org In-Reply-To: <20180427134016.2525989-2-arnd@arndb.de> References: <20180427134016.2525989-2-arnd@arndb.de> To: linux-tip-commits@vger.kernel.org Subject: [tip:timers/2038] timekeeping: Remove timespec64 hack Git-Commit-ID: 4f0fad9a603aee91a374e8411c23953894a77479 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 4f0fad9a603aee91a374e8411c23953894a77479 Gitweb: https://git.kernel.org/tip/4f0fad9a603aee91a374e8411c23953894a77479 Author: Arnd Bergmann AuthorDate: Fri, 27 Apr 2018 15:40:12 +0200 Committer: Thomas Gleixner CommitDate: Sat, 19 May 2018 13:57:31 +0200 timekeeping: Remove timespec64 hack At this point, we have converted most of the kernel to use timespec64 consistently in place of timespec, so it seems it's time to make timespec64 the native structure and define timespec in terms of that one on 64-bit architectures. Starting with gcc-5, the compiler can completely optimize away the timespec_to_timespec64 and timespec64_to_timespec functions on 64-bit architectures. With older compilers, we introduce a couple of extra copies of local variables, but those are easily avoided by using the timespec64 based interfaces consistently, as we do in most of the important code paths already. The main upside of removing the hack is that printing the tv_sec field of a timespec64 structure can now use the %lld format string on all architectures without a cast to time64_t. Without this patch, the field is a 'long' type and would have to be printed using %ld on 64-bit architectures. Signed-off-by: Arnd Bergmann Signed-off-by: Thomas Gleixner Cc: Stephen Boyd Cc: y2038@lists.linaro.org Cc: John Stultz Link: https://lkml.kernel.org/r/20180427134016.2525989-2-arnd@arndb.de --- include/linux/time32.h | 18 +++-------------- include/linux/time64.h | 7 ------- include/linux/timekeeping32.h | 45 ------------------------------------------- kernel/time/time.c | 2 -- 4 files changed, 3 insertions(+), 69 deletions(-) diff --git a/include/linux/time32.h b/include/linux/time32.h index d2bcd4377b56..0b14f936100a 100644 --- a/include/linux/time32.h +++ b/include/linux/time32.h @@ -18,25 +18,14 @@ /* timespec64 is defined as timespec here */ static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) { - return ts64; + return *(const struct timespec *)&ts64; } static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) { - return ts; + return *(const struct timespec64 *)&ts; } -# define timespec_equal timespec64_equal -# define timespec_compare timespec64_compare -# define set_normalized_timespec set_normalized_timespec64 -# define timespec_add timespec64_add -# define timespec_sub timespec64_sub -# define timespec_valid timespec64_valid -# define timespec_valid_strict timespec64_valid_strict -# define timespec_to_ns timespec64_to_ns -# define ns_to_timespec ns_to_timespec64 -# define timespec_add_ns timespec64_add_ns - #else static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64) { @@ -55,6 +44,7 @@ static inline struct timespec64 timespec_to_timespec64(const struct timespec ts) ret.tv_nsec = ts.tv_nsec; return ret; } +#endif static inline int timespec_equal(const struct timespec *a, const struct timespec *b) @@ -159,8 +149,6 @@ static __always_inline void timespec_add_ns(struct timespec *a, u64 ns) a->tv_nsec = ns; } -#endif - /** * time_to_tm - converts the calendar time to local broken-down time * diff --git a/include/linux/time64.h b/include/linux/time64.h index 0d96887ba4e0..0a7b2f79cec7 100644 --- a/include/linux/time64.h +++ b/include/linux/time64.h @@ -16,11 +16,6 @@ typedef __u64 timeu64_t; #include -#if __BITS_PER_LONG == 64 -/* this trick allows us to optimize out timespec64_to_timespec */ -# define timespec64 timespec -#define itimerspec64 itimerspec -#else struct timespec64 { time64_t tv_sec; /* seconds */ long tv_nsec; /* nanoseconds */ @@ -31,8 +26,6 @@ struct itimerspec64 { struct timespec64 it_value; }; -#endif - /* Parameters used to convert the timespec values: */ #define MSEC_PER_SEC 1000L #define USEC_PER_MSEC 1000L diff --git a/include/linux/timekeeping32.h b/include/linux/timekeeping32.h index 3616b4becb59..4ea45d0df1d4 100644 --- a/include/linux/timekeeping32.h +++ b/include/linux/timekeeping32.h @@ -16,50 +16,6 @@ static inline struct timespec current_kernel_time(void) return timespec64_to_timespec(now); } -#if BITS_PER_LONG == 64 -/** - * Deprecated. Use do_settimeofday64(). - */ -static inline int do_settimeofday(const struct timespec *ts) -{ - return do_settimeofday64(ts); -} - -static inline int __getnstimeofday(struct timespec *ts) -{ - return __getnstimeofday64(ts); -} - -static inline void getnstimeofday(struct timespec *ts) -{ - getnstimeofday64(ts); -} - -static inline void ktime_get_ts(struct timespec *ts) -{ - ktime_get_ts64(ts); -} - -static inline void ktime_get_real_ts(struct timespec *ts) -{ - getnstimeofday64(ts); -} - -static inline void getrawmonotonic(struct timespec *ts) -{ - getrawmonotonic64(ts); -} - -static inline struct timespec get_monotonic_coarse(void) -{ - return get_monotonic_coarse64(); -} - -static inline void getboottime(struct timespec *ts) -{ - return getboottime64(ts); -} -#else /** * Deprecated. Use do_settimeofday64(). */ @@ -124,7 +80,6 @@ static inline void getboottime(struct timespec *ts) getboottime64(&ts64); *ts = timespec64_to_timespec(ts64); } -#endif /* * Timespec interfaces utilizing the ktime based ones diff --git a/kernel/time/time.c b/kernel/time/time.c index ccd751e95fcb..6fa99213fc72 100644 --- a/kernel/time/time.c +++ b/kernel/time/time.c @@ -407,7 +407,6 @@ time64_t mktime64(const unsigned int year0, const unsigned int mon0, } EXPORT_SYMBOL(mktime64); -#if __BITS_PER_LONG == 32 /** * set_normalized_timespec - set timespec sec and nsec parts and normalize * @@ -468,7 +467,6 @@ struct timespec ns_to_timespec(const s64 nsec) return ts; } EXPORT_SYMBOL(ns_to_timespec); -#endif /** * ns_to_timeval - Convert nanoseconds to timeval