From: Nicolai Stange <nicstange@gmail.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>,
linux-kernel@vger.kernel.org,
Nicolai Stange <nicstange@gmail.com>
Subject: [RFC v5 19/23] timer_list: print_tickdevice(): calculate ->min_delta_ns dynamically
Date: Sun, 4 Sep 2016 03:28:48 +0200 [thread overview]
Message-ID: <20160904012852.17814-8-nicstange@gmail.com> (raw)
In-Reply-To: <20160904010200.17200-1-nicstange@gmail.com>
print_tickdevice(), assembling the per-tick device sections in
/proc/timer_list, is the last user of struct clock_event_device's
->min_delta_ns member.
In order to make this one fully obsolete while retaining userspace ABI,
calculate the displayed value of 'min_delta_ns' on the fly from
->min_delta_ticks_adjusted.
Signed-off-by: Nicolai Stange <nicstange@gmail.com>
---
kernel/time/timer_list.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index ac20d4c..9067760 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -206,10 +206,11 @@ static void
print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu)
{
struct clock_event_device *dev = td->evtdev;
- u64 max_delta_ns;
+ u64 max_delta_ns, min_delta_ns;
max_delta_ns = clockevent_delta2ns(dev->max_delta_ticks, dev);
max_delta_ns = min(max_delta_ns, dev->max_delta_ns);
+ min_delta_ns = clockevent_delta2ns(dev->min_delta_ticks_adjusted, dev);
SEQ_printf(m, "Tick Device: mode: %d\n", td->mode);
if (cpu < 0)
@@ -226,7 +227,7 @@ print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu)
SEQ_printf(m, " max_delta_ns: %llu\n",
(unsigned long long) max_delta_ns);
SEQ_printf(m, " min_delta_ns: %llu\n",
- (unsigned long long) dev->min_delta_ns);
+ (unsigned long long) min_delta_ns);
SEQ_printf(m, " mult: %u\n", dev->mult);
SEQ_printf(m, " shift: %u\n", dev->shift);
SEQ_printf(m, " mode: %d\n", clockevent_get_state(dev));
--
2.9.3
next prev parent reply other threads:[~2016-09-04 1:30 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-04 1:01 [RFC v5 00/23] adapt clockevents frequencies to mono clock Nicolai Stange
2016-09-04 1:01 ` [RFC v5 01/23] clocksource: sh_cmt: compute rate before registration again Nicolai Stange
2016-09-04 1:01 ` [RFC v5 02/23] clocksource: sh_tmu: " Nicolai Stange
2016-09-04 1:01 ` [RFC v5 03/23] clocksource: em_sti: split clock prepare and enable steps Nicolai Stange
2016-09-04 1:01 ` [RFC v5 04/23] clocksource: em_sti: compute rate before registration Nicolai Stange
2016-09-04 1:01 ` [RFC v5 05/23] clocksource: h8300_timer8: don't reset rate in ->set_state_oneshot() Nicolai Stange
2016-09-04 1:01 ` [RFC v5 06/23] clockevents: make clockevents_config() static Nicolai Stange
2016-09-04 1:01 ` [RFC v5 07/23] many clockevent drivers: set ->min_delta_ticks and ->max_delta_ticks Nicolai Stange
2016-09-04 1:01 ` [RFC v5 08/23] arch/s390/kernel/time: " Nicolai Stange
2016-09-04 1:01 ` [RFC v5 09/23] arch/x86/platform/uv/uv_time: " Nicolai Stange
2016-09-04 1:01 ` [RFC v5 10/23] arch/tile/kernel/time: " Nicolai Stange
2016-09-04 1:01 ` [RFC v5 11/23] clockevents: always initialize ->min_delta_ns and ->max_delta_ns Nicolai Stange
2016-09-04 1:28 ` [RFC v5 12/23] many clockevent drivers: don't set " Nicolai Stange
2016-09-04 1:28 ` [RFC v5 13/23] clockevents: introduce CLOCK_EVT_FEAT_NO_ADJUST flag Nicolai Stange
2016-09-04 1:28 ` [RFC v5 14/23] clockevents: decouple ->max_delta_ns from ->max_delta_ticks Nicolai Stange
2016-09-04 1:28 ` [RFC v5 15/23] clockevents: do comparison of delta against minimum in terms of cycles Nicolai Stange
2016-09-04 1:28 ` [RFC v5 16/23] clockevents: clockevents_program_min_delta(): don't set ->next_event Nicolai Stange
2016-09-04 1:28 ` [RFC v5 17/23] clockevents: use ->min_delta_ticks_adjusted to program minimum delta Nicolai Stange
2016-09-04 1:28 ` [RFC v5 18/23] clockevents: min delta increment: calculate min_delta_ns from ticks Nicolai Stange
2016-09-04 1:28 ` Nicolai Stange [this message]
2016-09-04 1:28 ` [RFC v5 20/23] clockevents: purge ->min_delta_ns Nicolai Stange
2016-09-04 1:28 ` [RFC v5 21/23] clockevents: initial support for mono to raw time conversion Nicolai Stange
2016-09-04 9:50 ` Nicolai Stange
2016-09-04 1:28 ` [RFC v5 22/23] clockevents: make setting of ->mult and ->mult_adjusted atomic Nicolai Stange
2016-09-04 1:28 ` [RFC v5 23/23] timekeeping: inform clockevents about freq adjustments Nicolai Stange
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=20160904012852.17814-8-nicstange@gmail.com \
--to=nicstange@gmail.com \
--cc=john.stultz@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=tglx@linutronix.de \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox