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From: Adrian Hunter <adrian.hunter@intel.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	John Stultz <jstultz@google.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Alexander Gordeev <agordeev@linux.ibm.com>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	linux-s390@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	x86@kernel.org, "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
	Ingo Molnar <mingo@redhat.com>,
	"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>,
	Christian Borntraeger <borntraeger@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Heiko Carstens <hca@linux.ibm.com>,
	Nicholas Piggin <npiggin@gmail.com>,
	Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Anna-Maria Behnsen <anna-maria@linutronix.de>,
	Stephen Boyd <sboyd@kernel.org>,
	Randy Dunlap <rdunlap@infradead.org>,
	linux-kernel@vger.kernel.org, Sven Schnelle <svens@linux.ibm.com>,
	linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 12/19] timekeeping: Reuse timekeeping_cycles_to_ns()
Date: Fri,  8 Mar 2024 15:15:05 +0200	[thread overview]
Message-ID: <20240308131512.44324-13-adrian.hunter@intel.com> (raw)
In-Reply-To: <20240308131512.44324-1-adrian.hunter@intel.com>

Simplify __timekeeping_get_ns() by reusing timekeeping_cycles_to_ns().

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 kernel/time/timekeeping.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index c698219b152d..f81d675291e0 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -391,10 +391,7 @@ static inline u64 timekeeping_cycles_to_ns(const struct tk_read_base *tkr, u64 c
 
 static __always_inline u64 __timekeeping_get_ns(const struct tk_read_base *tkr)
 {
-	u64 delta, cycles = tk_clock_read(tkr);
-
-	delta = clocksource_delta(cycles, tkr->cycle_last, tkr->mask);
-	return timekeeping_delta_to_ns(tkr, delta);
+	return timekeeping_cycles_to_ns(tkr, tk_clock_read(tkr));
 }
 
 static inline u64 timekeeping_get_ns(const struct tk_read_base *tkr)
-- 
2.34.1


  parent reply	other threads:[~2024-03-08 13:20 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-08 13:14 [PATCH 00/19] timekeeping: Handle potential multiplication overflow Adrian Hunter
2024-03-08 13:14 ` [PATCH 01/19] vdso: Consolidate vdso_calc_delta() Adrian Hunter
2024-03-09  2:09   ` John Stultz
2024-03-09  7:48   ` Christophe Leroy
2024-03-08 13:14 ` [PATCH 02/19] vdso: Consolidate nanoseconds calculation Adrian Hunter
2024-03-08 13:14 ` [PATCH 03/19] vdso: Add CONFIG_GENERIC_VDSO_OVERFLOW_PROTECT Adrian Hunter
2024-03-08 13:14 ` [PATCH 04/19] math64: Tidy mul_u64_u32_shr() Adrian Hunter
2024-03-08 13:14 ` [PATCH 05/19] vdso: math64: Provide mul_u64_u32_add_u64_shr() Adrian Hunter
2024-03-08 13:14 ` [PATCH 06/19] vdso: Add vdso_data::max_cycles Adrian Hunter
2024-03-08 13:15 ` [PATCH 07/19] vdso: Make delta calculation overflow safe Adrian Hunter
2024-03-08 13:15 ` [PATCH 08/19] x86/vdso: " Adrian Hunter
2024-03-08 13:15 ` [PATCH 09/19] timekeeping: Move timekeeping helper functions Adrian Hunter
2024-03-08 13:15 ` [PATCH 10/19] timekeeping: Rename fast_tk_get_delta_ns() to __timekeeping_get_ns() Adrian Hunter
2024-03-08 13:15 ` [PATCH 11/19] timekeeping: Tidy timekeeping_cycles_to_ns() slightly Adrian Hunter
2024-03-08 13:15 ` Adrian Hunter [this message]
2024-03-08 13:15 ` [PATCH 13/19] timekeeping: Refactor timekeeping helpers Adrian Hunter
2024-03-08 13:15 ` [PATCH 14/19] timekeeping: Consolidate " Adrian Hunter
2024-03-08 13:15 ` [PATCH 15/19] timekeeping: Fold in timekeeping_delta_to_ns() Adrian Hunter
2024-03-08 13:15 ` [PATCH 16/19] timekeeping: Prepare timekeeping_cycles_to_ns() for overflow safety Adrian Hunter
2024-03-08 13:15 ` [PATCH 17/19] timekeeping: Make delta calculation overflow safe Adrian Hunter
2024-03-08 13:15 ` [PATCH 18/19] timekeeping: Let timekeeping_cycles_to_ns() handle both under and overflow Adrian Hunter
2024-03-08 13:15 ` [PATCH 19/19] clocksource: Make watchdog and suspend-timing multiplication overflow safe Adrian Hunter

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