From: Anna-Maria Gleixner <anna-maria@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@kernel.org>,
Richard Cochran <rcochran@linutronix.de>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
James Hogan <james.hogan@imgtec.com>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
linux-metag@vger.kernel.org,
Anna-Maria Gleixner <anna-maria@linutronix.de>
Subject: [patch 41/66] clocksource/metag: Convert to hotplug state machine
Date: Mon, 11 Jul 2016 12:28:51 -0000 [thread overview]
Message-ID: <20160711122534.106924224@linutronix.de> (raw)
In-Reply-To: 20160711122450.923603742@linutronix.de
[-- Attachment #1: 0035-clocksource-metag-Convert-to-hotplug-state-machine.patch --]
[-- Type: text/plain, Size: 2441 bytes --]
From: Richard Cochran <rcochran@linutronix.de>
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.
Signed-off-by: Richard Cochran <rcochran@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-metag@vger.kernel.org
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
---
drivers/clocksource/metag_generic.c | 33 ++++++---------------------------
include/linux/cpuhotplug.h | 1 +
2 files changed, 7 insertions(+), 27 deletions(-)
--- a/drivers/clocksource/metag_generic.c
+++ b/drivers/clocksource/metag_generic.c
@@ -90,7 +90,7 @@ unsigned long long sched_clock(void)
return ticks << HARDWARE_TO_NS_SHIFT;
}
-static void arch_timer_setup(unsigned int cpu)
+static int arch_timer_starting_cpu(unsigned int cpu)
{
unsigned int txdivtime;
struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
@@ -132,27 +132,9 @@ static void arch_timer_setup(unsigned in
val = core_reg_read(TXUCT_ID, TXTIMER_REGNUM, thread0);
__core_reg_set(TXTIMER, val);
}
+ return 0;
}
-static int arch_timer_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
-{
- int cpu = (long)hcpu;
-
- switch (action) {
- case CPU_STARTING:
- case CPU_STARTING_FROZEN:
- arch_timer_setup(cpu);
- break;
- }
-
- return NOTIFY_OK;
-}
-
-static struct notifier_block arch_timer_cpu_nb = {
- .notifier_call = arch_timer_cpu_notify,
-};
-
int __init metag_generic_timer_init(void)
{
/*
@@ -170,11 +152,8 @@ int __init metag_generic_timer_init(void
setup_irq(tbisig_map(TBID_SIGNUM_TRT), &metag_timer_irq);
- /* Configure timer on boot CPU */
- arch_timer_setup(smp_processor_id());
-
- /* Hook cpu boot to configure other CPU's timers */
- register_cpu_notifier(&arch_timer_cpu_nb);
-
- return 0;
+ /* Hook cpu boot to configure the CPU's timers */
+ return cpuhp_setup_state(CPUHP_AP_METAG_TIMER_STARTING,
+ "AP_METAG_TIMER_STARTING",
+ arch_timer_starting_cpu, NULL);
}
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -41,6 +41,7 @@ enum cpuhp_state {
CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
CPUHP_AP_DUMMY_TIMER_STARTING,
CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
+ CPUHP_AP_METAG_TIMER_STARTING,
CPUHP_AP_KVM_STARTING,
CPUHP_AP_NOTIFY_STARTING,
CPUHP_AP_ONLINE,
next parent reply other threads:[~2016-07-11 12:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20160711122450.923603742@linutronix.de>
2016-07-11 12:28 ` Anna-Maria Gleixner [this message]
2016-07-11 12:28 ` [patch 49/66] metag: perf: Convert to hotplug state machine Anna-Maria Gleixner
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=20160711122534.106924224@linutronix.de \
--to=anna-maria@linutronix.de \
--cc=bigeasy@linutronix.de \
--cc=daniel.lezcano@linaro.org \
--cc=james.hogan@imgtec.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-metag@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=rcochran@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;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).