Commit-ID: 80bbe9f273a38f83ecfc50fe384a57f8428887bd Gitweb: http://git.kernel.org/tip/80bbe9f273a38f83ecfc50fe384a57f8428887bd Author: Thomas Gleixner <[email protected]> AuthorDate: Wed, 6 Mar 2013 11:18:37 +0000 Committer: Thomas Gleixner <[email protected]> CommitDate: Wed, 13 Mar 2013 11:39:40 +0100
arm: Use tick broadcast expired check Avoid going back into deep idle if the tick broadcast IPI is about to fire. Signed-off-by: Thomas Gleixner <[email protected]> Cc: LAK <[email protected]> Cc: John Stultz <[email protected]> Cc: Arjan van de Veen <[email protected]> Cc: Lorenzo Pieralisi <[email protected]> Tested-by: Santosh Shilimkar <[email protected]> Cc: Jason Liu <[email protected]> Link: http://lkml.kernel.org/r/[email protected] --- arch/arm/kernel/process.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c index 047d3e4..db4ffd0 100644 --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -199,7 +199,16 @@ void cpu_idle(void) #ifdef CONFIG_PL310_ERRATA_769419 wmb(); #endif - if (hlt_counter) { + /* + * In poll mode we reenable interrupts and spin. + * + * Also if we detected in the wakeup from idle + * path that the tick broadcast device expired + * for us, we don't want to go deep idle as we + * know that the IPI is going to arrive right + * away + */ + if (hlt_counter || tick_check_broadcast_expired()) { local_irq_enable(); cpu_relax(); } else if (!need_resched()) { -- 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/
