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From: Thomas Gleixner <tglx@linutronix.de>
To: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org,
	linux-kselftest@vger.kernel.org,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>, Arnd Bergmann <arnd@arndb.de>,
	Russell King <linux@armlinux.org.uk>,
	Ralf Baechle <ralf@linux-mips.org>,
	Paul Burton <paul.burton@mips.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Mark Salyzyn <salyzyn@android.com>,
	Peter Collingbourne <pcc@google.com>,
	Shuah Khan <shuah@kernel.org>,
	Dmitry Safonov <0x7f454c46@gmail.com>,
	Rasmus Villemoes <linux@rasmusvillemoes.dk>,
	Huw Davies <huw@codeweavers.com>
Subject: Re: [PATCH v6 03/19] kernel: Unify update_vsyscall implementation
Date: Fri, 14 Jun 2019 13:10:58 +0200 (CEST)
Message-ID: <alpine.DEB.2.21.1906141307430.1722@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20190530141531.43462-4-vincenzo.frascino@arm.com>

On Thu, 30 May 2019, Vincenzo Frascino wrote:
> +
> +	if (__arch_use_vsyscall(vdata)) {
> +		vdata[CS_HRES_COARSE].cycle_last	=
> +						tk->tkr_mono.cycle_last;
> +		vdata[CS_HRES_COARSE].mask		=
> +						tk->tkr_mono.mask;
> +		vdata[CS_HRES_COARSE].mult		=
> +						tk->tkr_mono.mult;

These line breaks make it really hard to read. Can you fold in the patch
below please?

Thanks,

	tglx
8<-----------
--- a/kernel/vdso/vsyscall.c
+++ b/kernel/vdso/vsyscall.c
@@ -11,6 +11,66 @@
 #include <vdso/helpers.h>
 #include <vdso/vsyscall.h>
 
+static inline void udpate_vdata(struct vdso_data *vdata, struct timekeeper *tk)
+{
+	struct vdso_timestamp *vdso_ts;
+	u64 nsec;
+
+	vdata[CS_HRES_COARSE].cycle_last	= tk->tkr_mono.cycle_last;
+	vdata[CS_HRES_COARSE].mask		= tk->tkr_mono.mask;
+	vdata[CS_HRES_COARSE].mult		= tk->tkr_mono.mult;
+	vdata[CS_HRES_COARSE].shift		= tk->tkr_mono.shift;
+	vdata[CS_RAW].cycle_last		= tk->tkr_raw.cycle_last;
+	vdata[CS_RAW].mask			= tk->tkr_raw.mask;
+	vdata[CS_RAW].mult			= tk->tkr_raw.mult;
+	vdata[CS_RAW].shift			= tk->tkr_raw.shift;
+
+	/* CLOCK_REALTIME */
+	vdso_ts		=  &vdata[CS_HRES_COARSE].basetime[CLOCK_REALTIME];
+	vdso_ts->sec	= tk->xtime_sec;
+	vdso_ts->nsec	= tk->tkr_mono.xtime_nsec;
+
+	/* CLOCK_MONOTONIC */
+	vdso_ts		= &vdata[CS_HRES_COARSE].basetime[CLOCK_MONOTONIC];
+	vdso_ts->sec	= tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
+
+	nsec = tk->tkr_mono.xtime_nsec;
+	nsec += ((u64)tk->wall_to_monotonic.tv_nsec << tk->tkr_mono.shift);
+	while (nsec >= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift)) {
+		nsec -= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift);
+		vdso_ts->sec++;
+	}
+	vdso_ts->nsec	= nsec;
+
+	/* CLOCK_MONOTONIC_RAW */
+	vdso_ts		= &vdata[CS_RAW].basetime[CLOCK_MONOTONIC_RAW];
+	vdso_ts->sec	= tk->raw_sec;
+	vdso_ts->nsec	= tk->tkr_raw.xtime_nsec;
+
+	/* CLOCK_BOOTTIME */
+	vdso_ts		= &vdata[CS_HRES_COARSE].basetime[CLOCK_BOOTTIME];
+	vdso_ts->sec	= tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
+	nsec = tk->tkr_mono.xtime_nsec;
+	nsec += ((u64)(tk->wall_to_monotonic.tv_nsec +
+		       ktime_to_ns(tk->offs_boot)) << tk->tkr_mono.shift);
+	while (nsec >= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift)) {
+		nsec -= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift);
+		vdso_ts->sec++;
+	}
+	vdso_ts->nsec	= nsec;
+
+	/* CLOCK_TAI */
+	vdso_ts		= &vdata[CS_HRES_COARSE].basetime[CLOCK_TAI];
+	vdso_ts->sec	= tk->xtime_sec + (s64)tk->tai_offset;
+	vdso_ts->nsec	= tk->tkr_mono.xtime_nsec;
+
+	/*
+	 * Read without the seqlock held by clock_getres().
+	 * Note: No need to have a second copy.
+	 */
+	WRITE_ONCE(vdata[CS_HRES_COARSE].hrtimer_res, hrtimer_resolution);
+}
+
 void update_vsyscall(struct timekeeper *tk)
 {
 	struct vdso_data *vdata = __arch_get_k_vdso_data();
@@ -32,92 +92,23 @@ void update_vsyscall(struct timekeeper *
 	vdata[CS_RAW].clock_mode		= __arch_get_clock_mode(tk);
 
 	/* CLOCK_REALTIME_COARSE */
-	vdso_ts			=
-			&vdata[CS_HRES_COARSE].basetime[CLOCK_REALTIME_COARSE];
-	vdso_ts->sec		= tk->xtime_sec;
-	vdso_ts->nsec		= tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift;
+	vdso_ts		= &vdata[CS_HRES_COARSE].basetime[CLOCK_REALTIME_COARSE];
+	vdso_ts->sec	= tk->xtime_sec;
+	vdso_ts->nsec	= tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift;
+
 	/* CLOCK_MONOTONIC_COARSE */
-	vdso_ts			=
-			&vdata[CS_HRES_COARSE].basetime[CLOCK_MONOTONIC_COARSE];
-	vdso_ts->sec		= tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
-	nsec			= tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift;
-	nsec			= nsec + tk->wall_to_monotonic.tv_nsec;
+	vdso_ts		= &vdata[CS_HRES_COARSE].basetime[CLOCK_MONOTONIC_COARSE];
+	vdso_ts->sec	= tk->xtime_sec + tk->wall_to_monotonic.tv_sec;
+	nsec		= tk->tkr_mono.xtime_nsec >> tk->tkr_mono.shift;
+	nsec		= nsec + tk->wall_to_monotonic.tv_nsec;
 	while (nsec >= NSEC_PER_SEC) {
 		nsec = nsec - NSEC_PER_SEC;
 		vdso_ts->sec++;
 	}
-	vdso_ts->nsec		= nsec;
+	vdso_ts->nsec	= nsec;
 
-	if (__arch_use_vsyscall(vdata)) {
-		vdata[CS_HRES_COARSE].cycle_last	=
-						tk->tkr_mono.cycle_last;
-		vdata[CS_HRES_COARSE].mask		=
-						tk->tkr_mono.mask;
-		vdata[CS_HRES_COARSE].mult		=
-						tk->tkr_mono.mult;
-		vdata[CS_HRES_COARSE].shift		=
-						tk->tkr_mono.shift;
-		vdata[CS_RAW].cycle_last		=
-						tk->tkr_raw.cycle_last;
-		vdata[CS_RAW].mask			=
-						tk->tkr_raw.mask;
-		vdata[CS_RAW].mult			=
-						tk->tkr_raw.mult;
-		vdata[CS_RAW].shift			=
-						tk->tkr_raw.shift;
-		/* CLOCK_REALTIME */
-		vdso_ts			=
-			&vdata[CS_HRES_COARSE].basetime[CLOCK_REALTIME];
-		vdso_ts->sec		= tk->xtime_sec;
-		vdso_ts->nsec		= tk->tkr_mono.xtime_nsec;
-		/* CLOCK_MONOTONIC */
-		vdso_ts			=
-			&vdata[CS_HRES_COARSE].basetime[CLOCK_MONOTONIC];
-		vdso_ts->sec		= tk->xtime_sec +
-					  tk->wall_to_monotonic.tv_sec;
-		nsec			= tk->tkr_mono.xtime_nsec;
-		nsec			= nsec +
-					  ((u64)tk->wall_to_monotonic.tv_nsec <<
-					  tk->tkr_mono.shift);
-		while (nsec >= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift)) {
-			nsec = nsec -
-			       (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift);
-			vdso_ts->sec++;
-		}
-		vdso_ts->nsec		= nsec;
-		/* CLOCK_MONOTONIC_RAW */
-		vdso_ts			=
-			&vdata[CS_RAW].basetime[CLOCK_MONOTONIC_RAW];
-		vdso_ts->sec		= tk->raw_sec;
-		vdso_ts->nsec		= tk->tkr_raw.xtime_nsec;
-		/* CLOCK_BOOTTIME */
-		vdso_ts			=
-			&vdata[CS_HRES_COARSE].basetime[CLOCK_BOOTTIME];
-		vdso_ts->sec		= tk->xtime_sec +
-					  tk->wall_to_monotonic.tv_sec;
-		nsec			= tk->tkr_mono.xtime_nsec;
-		nsec			= nsec +
-					  ((u64)(tk->wall_to_monotonic.tv_nsec +
-					  ktime_to_ns(tk->offs_boot)) <<
-					  tk->tkr_mono.shift);
-		while (nsec >= (((u64)NSEC_PER_SEC) << tk->tkr_mono.shift)) {
-			nsec = nsec -
-				(((u64)NSEC_PER_SEC) << tk->tkr_mono.shift);
-			vdso_ts->sec++;
-		}
-		vdso_ts->nsec		= nsec;
-		/* CLOCK_TAI */
-		vdso_ts			=
-			&vdata[CS_HRES_COARSE].basetime[CLOCK_TAI];
-		vdso_ts->sec		= tk->xtime_sec + (s64)tk->tai_offset;
-		vdso_ts->nsec		= tk->tkr_mono.xtime_nsec;
-
-		/*
-		 * Read without the seqlock held by clock_getres().
-		 * Note: No need to have a second copy.
-		 */
-		WRITE_ONCE(vdata[CS_HRES_COARSE].hrtimer_res, hrtimer_resolution);
-	}
+	if (__arch_use_vsyscall(vdata))
+		update_vdata(vdata, tk);
 
 	__arch_update_vsyscall(vdata, tk);
 

  parent reply index

Thread overview: 69+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-30 14:15 [PATCH v6 00/19] Unify vDSOs across more architectures Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 01/19] kernel: Standardize vdso_datapage Vincenzo Frascino
2019-05-31  8:16   ` Arnd Bergmann
2019-06-04 12:05     ` Vincenzo Frascino
2019-06-10 17:47       ` Huw Davies
2019-06-10  9:27   ` Huw Davies
2019-06-10 10:17     ` Vincenzo Frascino
2019-06-10 10:31       ` Huw Davies
2019-06-10 11:07         ` Vincenzo Frascino
2019-06-10 11:37           ` Huw Davies
2019-05-30 14:15 ` [PATCH v6 02/19] kernel: Define gettimeofday vdso common code Vincenzo Frascino
2019-05-31  8:19   ` Arnd Bergmann
2019-06-04 12:08     ` Vincenzo Frascino
2019-06-10  9:31   ` Huw Davies
2019-06-10 10:18     ` Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 03/19] kernel: Unify update_vsyscall implementation Vincenzo Frascino
2019-06-10  9:34   ` Huw Davies
2019-06-10 10:19     ` Vincenzo Frascino
2019-06-14 11:10   ` Thomas Gleixner [this message]
2019-06-14 12:15     ` Vincenzo Frascino
2019-06-14 12:19       ` Thomas Gleixner
2019-06-14 12:25         ` Vincenzo Frascino
2019-06-14 13:07           ` Thomas Gleixner
2019-05-30 14:15 ` [PATCH v6 04/19] arm64: Substitute gettimeofday with C implementation Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 05/19] arm64: Build vDSO with -ffixed-x18 Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 06/19] arm64: compat: Add missing syscall numbers Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 07/19] arm64: compat: Expose signal related structures Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 08/19] arm64: compat: Generate asm offsets for signals Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 09/19] lib: vdso: Add compat support Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 10/19] arm64: compat: Add vDSO Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 11/19] arm64: Refactor vDSO code Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 12/19] arm64: compat: vDSO setup for compat layer Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 13/19] arm64: elf: vDSO code page discovery Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 14/19] arm64: compat: Get sigreturn trampolines from vDSO Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 15/19] arm64: Add vDSO compat support Vincenzo Frascino
2019-06-01  9:38   ` Catalin Marinas
2019-06-04 12:10     ` Vincenzo Frascino
2019-05-30 14:15 ` [PATCH v6 16/19] arm: Add support for generic vDSO Vincenzo Frascino
2019-05-31  8:32   ` Arnd Bergmann
2019-05-30 14:15 ` [PATCH v6 17/19] mips: " Vincenzo Frascino
2019-05-31  8:34   ` Arnd Bergmann
2019-06-03 14:54     ` Mark Salyzyn
2019-06-03 17:07       ` Arnd Bergmann
2019-05-30 14:15 ` [PATCH v6 18/19] x86: " Vincenzo Frascino
2019-05-30 15:41   ` Michael Kelley
2019-06-04 12:13     ` Vincenzo Frascino
2019-06-14 11:15     ` Thomas Gleixner
2019-06-14 21:17       ` Sasha Levin
2019-06-22 14:46         ` Thomas Gleixner
2019-06-23 19:09           ` Sasha Levin
2019-06-23 21:58             ` Stephen Rothwell
2019-06-24  0:24               ` Sasha Levin
2019-06-24  1:20                 ` Stephen Rothwell
2019-06-23 22:12             ` Thomas Gleixner
2019-06-24  0:04               ` Michael Kelley
2019-06-24  0:25                 ` Thomas Gleixner
2019-06-28 18:40                   ` Michael Kelley
2019-05-30 14:15 ` [PATCH v6 19/19] kselftest: Extend vDSO selftest Vincenzo Frascino
2019-05-31  8:53   ` Arnd Bergmann
2019-05-31  8:46 ` [PATCH v6 00/19] Unify vDSOs across more architectures Arnd Bergmann
2019-06-04 12:04   ` Vincenzo Frascino
2019-06-04 12:12     ` Arnd Bergmann
2019-06-05 14:32       ` Vincenzo Frascino
2019-06-14 12:16     ` Thomas Gleixner
2019-06-14 12:19       ` Vincenzo Frascino
2019-06-20  6:17 ` Shijith Thotton
2019-06-20  8:55   ` Vincenzo Frascino
2019-06-20 16:27 ` Andre Przywara
2019-06-21  9:11   ` Vincenzo Frascino

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