From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail1.windriver.com (mail1.windriver.com [147.11.146.13]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail1.windriver.com", Issuer "Intel External Basic Issuing CA 3A" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 1679C2C0162 for ; Wed, 17 Apr 2013 19:50:42 +1000 (EST) From: Kevin Hao To: Benjamin Herrenschmidt Subject: [PATCH] powerpc: remove the unneeded trigger of decrementer interrupt in decrementer_check_overflow Date: Wed, 17 Apr 2013 17:50:35 +0800 Message-ID: <1366192235-17480-1-git-send-email-haokexin@gmail.com> MIME-Version: 1.0 Content-Type: text/plain Cc: linuxppc , Anton Blanchard List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Previously in order to handle the edge sensitive decrementers, we choose to set the decrementer to 1 to trigger a decrementer interrupt when re-enabling interrupts. But with the rework of the lazy EE, we would replay the decrementer interrupt when re-enabling interrupts if a decrementer interrupt occurs with irq soft-disabled. So there is no need to trigger a decrementer interrupt in this case any more. Signed-off-by: Kevin Hao --- arch/powerpc/kernel/irq.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 4f97fe3..1af5744 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -116,8 +116,6 @@ static inline notrace int decrementer_check_overflow(void) u64 now = get_tb_or_rtc(); u64 *next_tb = &__get_cpu_var(decrementers_next_tb); - if (now >= *next_tb) - set_dec(1); return now >= *next_tb; } -- 1.8.1.4