From: tip-bot for Richard Weinberger <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org,
richard@nod.at, tglx@linutronix.de
Subject: [tip:smp/hotplug] um: Use generic idle loop
Date: Wed, 17 Apr 2013 02:01:32 -0700 [thread overview]
Message-ID: <tip-8198c1696a2cd15d436ade172bfd8085f5f818d3@git.kernel.org> (raw)
In-Reply-To: <1366149209-24787-1-git-send-email-richard@nod.at>
Commit-ID: 8198c1696a2cd15d436ade172bfd8085f5f818d3
Gitweb: http://git.kernel.org/tip/8198c1696a2cd15d436ade172bfd8085f5f818d3
Author: Richard Weinberger <richard@nod.at>
AuthorDate: Tue, 16 Apr 2013 23:53:29 +0200
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 17 Apr 2013 10:39:38 +0200
um: Use generic idle loop
Signed-off-by: Richard Weinberger <richard@nod.at>
Cc: user-mode-linux-devel@lists.sourceforge.net
Link: http://lkml.kernel.org/r/1366149209-24787-1-git-send-email-richard@nod.at
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/um/Kconfig.common | 1 +
arch/um/kernel/process.c | 27 ++++-----------------------
2 files changed, 5 insertions(+), 23 deletions(-)
diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common
index bceee66..5783406 100644
--- a/arch/um/Kconfig.common
+++ b/arch/um/Kconfig.common
@@ -12,6 +12,7 @@ config UML
select GENERIC_CPU_DEVICES
select GENERIC_IO
select GENERIC_CLOCKEVENTS
+ select GENERIC_IDLE_LOOP
select TTY # Needed for line.c
config MMU
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index b462b13..bbcef52 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -210,33 +210,14 @@ void initial_thread_cb(void (*proc)(void *), void *arg)
kmalloc_ok = save_kmalloc_ok;
}
-void default_idle(void)
+void arch_cpu_idle(void)
{
unsigned long long nsecs;
- while (1) {
- /* endless idle loop with no priority at all */
-
- /*
- * although we are an idle CPU, we do not want to
- * get into the scheduler unnecessarily.
- */
- if (need_resched())
- schedule();
-
- tick_nohz_idle_enter();
- rcu_idle_enter();
- nsecs = disable_timer();
- idle_sleep(nsecs);
- rcu_idle_exit();
- tick_nohz_idle_exit();
- }
-}
-
-void cpu_idle(void)
-{
cpu_tasks[current_thread_info()->cpu].pid = os_getpid();
- default_idle();
+ nsecs = disable_timer();
+ idle_sleep(nsecs);
+ local_irq_enable();
}
int __cant_sleep(void) {
prev parent reply other threads:[~2013-04-17 9:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-16 21:53 [PATCH] um: Use generic idle loop Richard Weinberger
2013-04-17 9:01 ` tip-bot for Richard Weinberger [this message]
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