LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Arnd Bergmann <arnd@arndb.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org, Stephen Boyd <sboyd@kernel.org>,
	John Stultz <john.stultz@linaro.org>,
	y2038@lists.linaro.org, Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH 3/5] timekeeping: Standardize on ktime_get_*() naming
Date: Fri, 27 Apr 2018 15:40:14 +0200	[thread overview]
Message-ID: <20180427134016.2525989-4-arnd@arndb.de> (raw)
In-Reply-To: <20180427134016.2525989-1-arnd@arndb.de>

The current_kernel_time64, get_monotonic_coarse64, getrawmonotonic64,
get_monotonic_boottime64 and timekeeping_clocktai64 interfaces have
rather inconsistent naming, and they differ in the calling conventions
by passing the output either by reference or as a return value.

Rename them to ktime_get_coarse_real_ts64, ktime_get_coarse_ts64,
ktime_get_raw_ts64, ktime_get_boottime_ts64 and ktime_get_clocktai_ts64
respectively, and provide the interfaces with macros or inline
functions as needed.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 include/linux/timekeeping.h   | 43 ++++++++++++++++++++++++++++++++-----------
 include/linux/timekeeping32.h | 14 ++++++++++----
 kernel/time/timekeeping.c     | 23 +++++++++--------------
 3 files changed, 51 insertions(+), 29 deletions(-)

diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h
index 415dae6bf1f5..3ef9791d7d75 100644
--- a/include/linux/timekeeping.h
+++ b/include/linux/timekeeping.h
@@ -19,25 +19,25 @@ extern void xtime_update(unsigned long ticks);
 extern int do_settimeofday64(const struct timespec64 *ts);
 extern int do_sys_settimeofday64(const struct timespec64 *tv,
 				 const struct timezone *tz);
-/*
- * Kernel time accessors
- */
-struct timespec64 current_kernel_time64(void);
 
 /*
  * timespec64 based interfaces
  */
-struct timespec64 get_monotonic_coarse64(void);
-extern void getrawmonotonic64(struct timespec64 *ts);
+extern void ktime_get_raw_ts64(struct timespec64 *ts);
 extern void ktime_get_ts64(struct timespec64 *ts);
 extern void ktime_get_real_ts64(struct timespec64 *tv);
+extern void ktime_get_coarse_ts64(struct timespec64 *ts);
+extern void ktime_get_coarse_real_ts64(struct timespec64 *ts);
+
+void getboottime64(struct timespec64 *ts);
+
+/*
+ * time64_t base interfaces
+ */
 extern time64_t ktime_get_seconds(void);
 extern time64_t __ktime_get_real_seconds(void);
 extern time64_t ktime_get_real_seconds(void);
 
-extern void getboottime64(struct timespec64 *ts);
-
-
 /*
  * ktime_t based interfaces
  */
@@ -123,12 +123,12 @@ extern u64 ktime_get_real_fast_ns(void);
 /*
  * timespec64 interfaces utilizing the ktime based ones
  */
-static inline void get_monotonic_boottime64(struct timespec64 *ts)
+static inline void ktime_get_boottime_ts64(struct timespec64 *ts)
 {
 	*ts = ktime_to_timespec64(ktime_get_boottime());
 }
 
-static inline void timekeeping_clocktai64(struct timespec64 *ts)
+static inline void ktime_get_clocktai_ts64(struct timespec64 *ts)
 {
 	*ts = ktime_to_timespec64(ktime_get_clocktai());
 }
@@ -212,5 +212,26 @@ extern int update_persistent_clock64(struct timespec64 now);
  * deprecated aliases, don't use in new code
  */
 #define getnstimeofday64(ts)		ktime_get_real_ts64(ts)
+#define get_monotonic_boottime64(ts)	ktime_get_boottime_ts64(ts)
+#define getrawmonotonic64(ts)		ktime_get_raw_ts64(ts)
+#define timekeeping_clocktai64(ts)	ktime_get_clocktai_ts64(ts)
+
+static inline struct timespec64 current_kernel_time64(void)
+{
+	struct timespec64 ts;
+
+	ktime_get_coarse_real_ts64(&ts);
+
+	return ts;
+}
+
+static inline struct timespec64 get_monotonic_coarse64(void)
+{
+	struct timespec64 ts;
+
+	ktime_get_coarse_ts64(&ts);
+
+	return ts;
+}
 
 #endif
diff --git a/include/linux/timekeeping32.h b/include/linux/timekeeping32.h
index 5abff52d07fd..8762c2f45f8b 100644
--- a/include/linux/timekeeping32.h
+++ b/include/linux/timekeeping32.h
@@ -11,9 +11,11 @@ unsigned long get_seconds(void);
 
 static inline struct timespec current_kernel_time(void)
 {
-	struct timespec64 now = current_kernel_time64();
+	struct timespec64 ts64;
+
+	ktime_get_coarse_real_ts64(&ts64);
 
-	return timespec64_to_timespec(now);
+	return timespec64_to_timespec(ts64);
 }
 
 /**
@@ -55,13 +57,17 @@ static inline void getrawmonotonic(struct timespec *ts)
 {
 	struct timespec64 ts64;
 
-	getrawmonotonic64(&ts64);
+	ktime_get_raw_ts64(&ts64);
 	*ts = timespec64_to_timespec(ts64);
 }
 
 static inline struct timespec get_monotonic_coarse(void)
 {
-	return timespec64_to_timespec(get_monotonic_coarse64());
+	struct timespec64 ts64;
+
+	ktime_get_coarse_ts64(&ts64);
+
+	return timespec64_to_timespec(ts64);
 }
 
 static inline void getboottime(struct timespec *ts)
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 7bbc7a6e6095..ed9b74ec9c0b 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -1391,12 +1391,12 @@ int timekeeping_notify(struct clocksource *clock)
 }
 
 /**
- * getrawmonotonic64 - Returns the raw monotonic time in a timespec
+ * ktime_get_raw_ts64 - Returns the raw monotonic time in a timespec
  * @ts:		pointer to the timespec64 to be set
  *
  * Returns the raw monotonic time (completely un-modified by ntp)
  */
-void getrawmonotonic64(struct timespec64 *ts)
+void ktime_get_raw_ts64(struct timespec64 *ts)
 {
 	struct timekeeper *tk = &tk_core.timekeeper;
 	unsigned long seq;
@@ -1412,7 +1412,7 @@ void getrawmonotonic64(struct timespec64 *ts)
 	ts->tv_nsec = 0;
 	timespec64_add_ns(ts, nsecs);
 }
-EXPORT_SYMBOL(getrawmonotonic64);
+EXPORT_SYMBOL(ktime_get_raw_ts64);
 
 
 /**
@@ -2114,23 +2114,20 @@ unsigned long get_seconds(void)
 }
 EXPORT_SYMBOL(get_seconds);
 
-struct timespec64 current_kernel_time64(void)
+void ktime_get_coarse_real_ts64(struct timespec64 *ts)
 {
 	struct timekeeper *tk = &tk_core.timekeeper;
-	struct timespec64 now;
 	unsigned long seq;
 
 	do {
 		seq = read_seqcount_begin(&tk_core.seq);
 
-		now = tk_xtime(tk);
+		*ts = tk_xtime(tk);
 	} while (read_seqcount_retry(&tk_core.seq, seq));
-
-	return now;
 }
-EXPORT_SYMBOL(current_kernel_time64);
+EXPORT_SYMBOL(ktime_get_coarse_real_ts64);
 
-struct timespec64 get_monotonic_coarse64(void)
+void ktime_get_coarse_ts64(struct timespec64 *ts)
 {
 	struct timekeeper *tk = &tk_core.timekeeper;
 	struct timespec64 now, mono;
@@ -2143,12 +2140,10 @@ struct timespec64 get_monotonic_coarse64(void)
 		mono = tk->wall_to_monotonic;
 	} while (read_seqcount_retry(&tk_core.seq, seq));
 
-	set_normalized_timespec64(&now, now.tv_sec + mono.tv_sec,
+	set_normalized_timespec64(ts, now.tv_sec + mono.tv_sec,
 				now.tv_nsec + mono.tv_nsec);
-
-	return now;
 }
-EXPORT_SYMBOL(get_monotonic_coarse64);
+EXPORT_SYMBOL(ktime_get_coarse_ts64);
 
 /*
  * Must hold jiffies_lock
-- 
2.9.0

  parent reply	other threads:[~2018-04-27 13:40 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-27 13:40 [PATCH 0/5] timekeeping: API cleanup and extensions Arnd Bergmann
2018-04-27 13:40 ` [PATCH 1/5] timekeeping: Remove timespec64 hack Arnd Bergmann
2018-04-27 20:16   ` Arnd Bergmann
2018-05-19 12:00   ` [tip:timers/2038] " tip-bot for Arnd Bergmann
2018-04-27 13:40 ` [PATCH 2/5] timekeeping: Clean up ktime_get_real_ts64 Arnd Bergmann
2018-05-19 12:01   ` [tip:timers/2038] " tip-bot for Arnd Bergmann
2018-04-27 13:40 ` Arnd Bergmann [this message]
2018-05-19 12:01   ` [tip:timers/2038] timekeeping: Standardize on ktime_get_*() naming tip-bot for Arnd Bergmann
2018-04-27 13:40 ` [PATCH 4/5] timekeeping: Add ktime_get_coarse_with_offset Arnd Bergmann
2018-05-19 12:02   ` [tip:timers/2038] " tip-bot for Arnd Bergmann
2018-04-27 13:40 ` [PATCH 5/5] timekeeping: Add more coarse clocktai/boottime interfaces Arnd Bergmann
2018-05-19 12:02   ` [tip:timers/2038] " tip-bot for Arnd Bergmann

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20180427134016.2525989-4-arnd@arndb.de \
    --to=arnd@arndb.de \
    --cc=john.stultz@linaro.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=sboyd@kernel.org \
    --cc=tglx@linutronix.de \
    --cc=y2038@lists.linaro.org \
    --subject='Re: [PATCH 3/5] timekeeping: Standardize on ktime_get_*() naming' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).