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authorLinus Torvalds <torvalds@linux-foundation.org>2013-04-30 07:50:17 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-04-30 07:50:17 -0700
commit8700c95adb033843fc163d112b9d21d4fda78018 (patch)
tree7bb9a37b8fe6328f63a61d88063c556346001098 /arch/blackfin
parent16fa94b532b1958f508e07eca1a9256351241fbc (diff)
parentd190e8195b90bc1e65c494fe08e54e9e581bfd16 (diff)
downloadlinux-8700c95adb033843fc163d112b9d21d4fda78018.tar.gz
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull SMP/hotplug changes from Ingo Molnar: "This is a pretty large, multi-arch series unifying and generalizing the various disjunct pieces of idle routines that architectures have historically copied from each other and have grown in random, wildly inconsistent and sometimes buggy directions: 101 files changed, 455 insertions(+), 1328 deletions(-) this went through a number of review and test iterations before it was committed, it was tested on various architectures, was exposed to linux-next for quite some time - nevertheless it might cause problems on architectures that don't read the mailing lists and don't regularly test linux-next. This cat herding excercise was motivated by the -rt kernel, and was brought to you by Thomas "the Whip" Gleixner." * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (40 commits) idle: Remove GENERIC_IDLE_LOOP config switch um: Use generic idle loop ia64: Make sure interrupts enabled when we "safe_halt()" sparc: Use generic idle loop idle: Remove unused ARCH_HAS_DEFAULT_IDLE bfin: Fix typo in arch_cpu_idle() xtensa: Use generic idle loop x86: Use generic idle loop unicore: Use generic idle loop tile: Use generic idle loop tile: Enter idle with preemption disabled sh: Use generic idle loop score: Use generic idle loop s390: Use generic idle loop powerpc: Use generic idle loop parisc: Use generic idle loop openrisc: Use generic idle loop mn10300: Use generic idle loop mips: Use generic idle loop microblaze: Use generic idle loop ...
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/kernel/process.c32
-rw-r--r--arch/blackfin/mach-common/smp.c2
2 files changed, 7 insertions, 27 deletions
diff --git a/arch/blackfin/kernel/process.c b/arch/blackfin/kernel/process.c
index 9782c0329c1..4aa5545c4fd 100644
--- a/arch/blackfin/kernel/process.c
+++ b/arch/blackfin/kernel/process.c
@@ -46,15 +46,14 @@ EXPORT_SYMBOL(pm_power_off);
* The idle loop on BFIN
*/
#ifdef CONFIG_IDLE_L1
-static void default_idle(void)__attribute__((l1_text));
-void cpu_idle(void)__attribute__((l1_text));
+void arch_cpu_idle(void)__attribute__((l1_text));
#endif
/*
* This is our default idle handler. We need to disable
* interrupts here to ensure we don't miss a wakeup call.
*/
-static void default_idle(void)
+void arch_cpu_idle(void)
{
#ifdef CONFIG_IPIPE
ipipe_suspend_domain();
@@ -66,31 +65,12 @@ static void default_idle(void)
hard_local_irq_enable();
}
-/*
- * The idle thread. We try to conserve power, while trying to keep
- * overall latency low. The architecture specific idle is passed
- * a value to indicate the level of "idleness" of the system.
- */
-void cpu_idle(void)
-{
- /* endless idle loop with no priority at all */
- while (1) {
-
#ifdef CONFIG_HOTPLUG_CPU
- if (cpu_is_offline(smp_processor_id()))
- cpu_die();
-#endif
- tick_nohz_idle_enter();
- rcu_idle_enter();
- while (!need_resched())
- default_idle();
- rcu_idle_exit();
- tick_nohz_idle_exit();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
- }
+void arch_cpu_idle_dead(void)
+{
+ cpu_die();
}
+#endif
/*
* Do necessary setup to start up a newly executed thread.
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index bb61ae4986e..1bc2ce6f3c9 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -335,7 +335,7 @@ void __cpuinit secondary_start_kernel(void)
*/
calibrate_delay();
- cpu_idle();
+ cpu_startup_entry(CPUHP_ONLINE);
}
void __init smp_prepare_boot_cpu(void)