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authorFrederic Weisbecker <fweisbec@gmail.com>2013-02-05 00:48:46 +0100
committerFrederic Weisbecker <fweisbec@gmail.com>2013-02-05 00:48:46 +0100
commit077931446b85e7858bf9dc0927cd116669b965d2 (patch)
tree02fbdf4a42b30b841a61aca399bd0ac6a5c308e6 /kernel/time/tick-sched.c
parentf7c819c020db9796ae3a662b82a310617f92b15b (diff)
parent74876a98a87a115254b3a66a14b27320b7f0acaa (diff)
downloadop-kernel-dev-077931446b85e7858bf9dc0927cd116669b965d2.zip
op-kernel-dev-077931446b85e7858bf9dc0927cd116669b965d2.tar.gz
Merge branch 'nohz/printk-v8' into irq/core
Conflicts: kernel/irq_work.c Add support for printk in full dynticks CPU. * Don't stop tick with irq works pending. This fix is generally useful and concerns archs that can't raise self IPIs. * Flush irq works before CPU offlining. * Introduce "lazy" irq works that can wait for the next tick to be executed, unless it's stopped. * Implement klogd wake up using irq work. This removes the ad-hoc printk_tick()/printk_needs_cpu() hooks and make it working even in dynticks mode. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'kernel/time/tick-sched.c')
-rw-r--r--kernel/time/tick-sched.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index d58e552..fb8e5e4 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -20,6 +20,7 @@
#include <linux/profile.h>
#include <linux/sched.h>
#include <linux/module.h>
+#include <linux/irq_work.h>
#include <asm/irq_regs.h>
@@ -28,7 +29,7 @@
/*
* Per cpu nohz control structure
*/
-static DEFINE_PER_CPU(struct tick_sched, tick_cpu_sched);
+DEFINE_PER_CPU(struct tick_sched, tick_cpu_sched);
/*
* The time, when the last jiffy update happened. Protected by jiffies_lock.
@@ -331,8 +332,8 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
time_delta = timekeeping_max_deferment();
} while (read_seqretry(&jiffies_lock, seq));
- if (rcu_needs_cpu(cpu, &rcu_delta_jiffies) || printk_needs_cpu(cpu) ||
- arch_needs_cpu(cpu)) {
+ if (rcu_needs_cpu(cpu, &rcu_delta_jiffies) ||
+ arch_needs_cpu(cpu) || irq_work_needs_cpu()) {
next_jiffies = last_jiffies + 1;
delta_jiffies = 1;
} else {
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