The microblaze idle loop provides a polling and a non polling version, which are suprisingly both polling, just with slightly different instrumentation. Remove them and use the generic poller. Signed-off-by: Thomas Gleixner Cc: Michal Simek --- arch/microblaze/Kconfig | 2 + arch/microblaze/include/asm/processor.h | 3 - arch/microblaze/kernel/process.c | 53 -------------------------------- 3 files changed, 2 insertions(+), 56 deletions(-) Index: linux-2.6/arch/microblaze/Kconfig =================================================================== --- linux-2.6.orig/arch/microblaze/Kconfig +++ linux-2.6/arch/microblaze/Kconfig @@ -26,6 +26,8 @@ config MICROBLAZE select GENERIC_CPU_DEVICES select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS + select GENERIC_IDLE_LOOP + select GENERIC_IDLE_POLL_SETUP select MODULES_USE_ELF_RELA select CLONE_BACKWARDS Index: linux-2.6/arch/microblaze/include/asm/processor.h =================================================================== --- linux-2.6.orig/arch/microblaze/include/asm/processor.h +++ linux-2.6/arch/microblaze/include/asm/processor.h @@ -22,7 +22,6 @@ extern const struct seq_operations cpuinfo_op; # define cpu_relax() barrier() -# define cpu_sleep() do {} while (0) #define task_pt_regs(tsk) \ (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) @@ -160,8 +159,6 @@ unsigned long get_wchan(struct task_stru # define STACK_TOP TASK_SIZE # define STACK_TOP_MAX STACK_TOP -void default_idle(void); - #ifdef CONFIG_DEBUG_FS extern struct dentry *of_debugfs_root; #endif Index: linux-2.6/arch/microblaze/kernel/process.c =================================================================== --- linux-2.6.orig/arch/microblaze/kernel/process.c +++ linux-2.6/arch/microblaze/kernel/process.c @@ -44,59 +44,6 @@ void show_regs(struct pt_regs *regs) void (*pm_power_off)(void) = NULL; EXPORT_SYMBOL(pm_power_off); -static int hlt_counter = 1; - -static int __init nohlt_setup(char *__unused) -{ - hlt_counter = 1; - return 1; -} -__setup("nohlt", nohlt_setup); - -static int __init hlt_setup(char *__unused) -{ - hlt_counter = 0; - return 1; -} -__setup("hlt", hlt_setup); - -void default_idle(void) -{ - if (likely(hlt_counter)) { - local_irq_disable(); - stop_critical_timings(); - cpu_relax(); - start_critical_timings(); - local_irq_enable(); - } else { - clear_thread_flag(TIF_POLLING_NRFLAG); - smp_mb__after_clear_bit(); - local_irq_disable(); - while (!need_resched()) - cpu_sleep(); - local_irq_enable(); - set_thread_flag(TIF_POLLING_NRFLAG); - } -} - -void cpu_idle(void) -{ - set_thread_flag(TIF_POLLING_NRFLAG); - - /* endless idle loop with no priority at all */ - while (1) { - tick_nohz_idle_enter(); - rcu_idle_enter(); - while (!need_resched()) - default_idle(); - rcu_idle_exit(); - tick_nohz_idle_exit(); - - schedule_preempt_disabled(); - check_pgt_cache(); - } -} - void flush_thread(void) { }