[PATCH] um: Use generic idle loop

[Richard Weinberger]

Signed-off-by: Richard Weinberger <rich...@nod.at>
---
 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) {
-- 
1.8.1.4

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