Commit-ID: 4d0e42cc66f4e7e0bf08b29da1ae6ebd60549c4e Gitweb: http://git.kernel.org/tip/4d0e42cc66f4e7e0bf08b29da1ae6ebd60549c4e Author: Daniel Lezcano <daniel.lezc...@linaro.org> AuthorDate: Thu, 25 Oct 2012 18:13:11 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Fri, 26 Oct 2012 12:25:03 +0200
x86: Remove dead hlt_use_halt code The hlt_use_halt function returns always true and there is only one definition of it. The default_idle function can then get ride of the if ... statement and we can remove the else branch. Signed-off-by: Daniel Lezcano <daniel.lezc...@linaro.org> Cc: linaro-...@lists.linaro.org Cc: patc...@linaro.org Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/1351181591-8710-1-git-send-email-daniel.lezc...@linaro.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/kernel/process.c | 39 ++++++++++++++------------------------- 1 files changed, 14 insertions(+), 25 deletions(-) diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index b644e1c..2f99e31 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -306,11 +306,6 @@ void (*pm_idle)(void); EXPORT_SYMBOL(pm_idle); #endif -static inline int hlt_use_halt(void) -{ - return 1; -} - #ifndef CONFIG_SMP static inline void play_dead(void) { @@ -410,28 +405,22 @@ void cpu_idle(void) */ void default_idle(void) { - if (hlt_use_halt()) { - trace_power_start_rcuidle(POWER_CSTATE, 1, smp_processor_id()); - trace_cpu_idle_rcuidle(1, smp_processor_id()); - current_thread_info()->status &= ~TS_POLLING; - /* - * TS_POLLING-cleared state must be visible before we - * test NEED_RESCHED: - */ - smp_mb(); + trace_power_start_rcuidle(POWER_CSTATE, 1, smp_processor_id()); + trace_cpu_idle_rcuidle(1, smp_processor_id()); + current_thread_info()->status &= ~TS_POLLING; + /* + * TS_POLLING-cleared state must be visible before we + * test NEED_RESCHED: + */ + smp_mb(); - if (!need_resched()) - safe_halt(); /* enables interrupts racelessly */ - else - local_irq_enable(); - current_thread_info()->status |= TS_POLLING; - trace_power_end_rcuidle(smp_processor_id()); - trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id()); - } else { + if (!need_resched()) + safe_halt(); /* enables interrupts racelessly */ + else local_irq_enable(); - /* loop is done by the caller */ - cpu_relax(); - } + current_thread_info()->status |= TS_POLLING; + trace_power_end_rcuidle(smp_processor_id()); + trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id()); } #ifdef CONFIG_APM_MODULE EXPORT_SYMBOL(default_idle); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
