From: Thomas Gleixner <tglx@linutronix.de>
To: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: linux-arch@vger.kernel.org, Shuah Khan <shuah@kernel.org>,
Arnd Bergmann <arnd@arndb.de>, Huw Davies <huw@codeweavers.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Will Deacon <will.deacon@arm.com>,
linux-kernel@vger.kernel.org, Ralf Baechle <ralf@linux-mips.org>,
linux-mips@vger.kernel.org, Paul Burton <paul.burton@mips.com>,
linux-kselftest@vger.kernel.org,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Russell King <linux@armlinux.org.uk>,
Dmitry Safonov <0x7f454c46@gmail.com>,
Mark Salyzyn <salyzyn@android.com>,
Peter Collingbourne <pcc@google.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v6 03/19] kernel: Unify update_vsyscall implementation
Date: Fri, 14 Jun 2019 13:10:58 +0200 (CEST) [thread overview]
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);
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next prev parent reply other threads:[~2019-06-14 11:11 UTC|newest]
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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