Commit-ID: fa35e42a00ec0120db2b5128753206efb288e789 Gitweb: http://git.kernel.org/tip/fa35e42a00ec0120db2b5128753206efb288e789 Author: Thomas Gleixner <[email protected]> AuthorDate: Thu, 21 Mar 2013 22:49:36 +0100 Committer: Thomas Gleixner <[email protected]> CommitDate: Mon, 8 Apr 2013 17:39:23 +0200
arc: Use generic idle loop The generic idle loop implements all functionality. Aside of that it allows arc to implement the tsk_is_polling() functionality correctly, despite the patently (now gone) comment in the original arc cpu_idle() function: /* Since we SLEEP in idle loop, TIF_POLLING_NRFLAG can't be set */ See kernel/cpu/idle.c Signed-off-by: Thomas Gleixner <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Rusty Russell <[email protected]> Cc: Paul McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Reviewed-by: Cc: Srivatsa S. Bhat <[email protected]> Cc: Magnus Damm <[email protected]> Acked-by: Vineet Gupta <[email protected]> Tested-by: Vineet Gupta <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> --- arch/arc/Kconfig | 1 + arch/arc/kernel/process.c | 27 +-------------------------- arch/arc/kernel/smp.c | 2 +- 3 files changed, 3 insertions(+), 27 deletions(-) diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index e6f4eca..b006977 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -14,6 +14,7 @@ config ARC select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS select GENERIC_FIND_FIRST_BIT + select GENERIC_IDLE_LOOP # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP select GENERIC_IRQ_SHOW select GENERIC_KERNEL_EXECVE diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c index 0a7531d..cad6685 100644 --- a/arch/arc/kernel/process.c +++ b/arch/arc/kernel/process.c @@ -41,37 +41,12 @@ SYSCALL_DEFINE0(arc_gettls) return task_thread_info(current)->thr_ptr; } -static inline void arch_idle(void) +void arch_cpu_idle(void) { /* sleep, but enable all interrupts before committing */ __asm__("sleep 0x3"); } -void cpu_idle(void) -{ - /* Since we SLEEP in idle loop, TIF_POLLING_NRFLAG can't be set */ - - /* endless idle loop with no priority at all */ - while (1) { - tick_nohz_idle_enter(); - rcu_idle_enter(); - -doze: - local_irq_disable(); - if (!need_resched()) { - arch_idle(); - goto doze; - } else { - local_irq_enable(); - } - - rcu_idle_exit(); - tick_nohz_idle_exit(); - - schedule_preempt_disabled(); - } -} - asmlinkage void ret_from_fork(void); /* Layout of Child kernel mode stack as setup at the end of this function is diff --git a/arch/arc/kernel/smp.c b/arch/arc/kernel/smp.c index 3af3e06..5c7fd60 100644 --- a/arch/arc/kernel/smp.c +++ b/arch/arc/kernel/smp.c @@ -141,7 +141,7 @@ void __cpuinit start_kernel_secondary(void) local_irq_enable(); preempt_disable(); - cpu_idle(); + cpu_startup_entry(CPUHP_ONLINE); } /* -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
