From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-x22f.google.com (mail-pb0-x22f.google.com [IPv6:2607:f8b0:400e:c01::22f]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (not verified)) by ozlabs.org (Postfix) with ESMTPS id DE7FC2C00CC for ; Thu, 26 Sep 2013 18:42:29 +1000 (EST) Received: by mail-pb0-f47.google.com with SMTP id rr4so833135pbb.20 for ; Thu, 26 Sep 2013 01:42:27 -0700 (PDT) From: Kevin Hao To: Benjamin Herrenschmidt Subject: [PATCH] powerpc/ppc64: remove the unneeded load of ti_flags in resume_kernel Date: Thu, 26 Sep 2013 16:41:34 +0800 Message-Id: <1380184894-19862-1-git-send-email-haokexin@gmail.com> Cc: Tiejun Chen , linuxppc List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , We already got the value of current_thread_info and ti_flags and store them into r9 and r4 respectively before jumping to resume_kernel. So there is no reason to reload them again. Signed-off-by: Kevin Hao --- arch/powerpc/kernel/entry_64.S | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index c04cdf7..2fe620f 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -673,9 +673,7 @@ _GLOBAL(ret_from_except_lite) resume_kernel: /* check current_thread_info, _TIF_EMULATE_STACK_STORE */ - CURRENT_THREAD_INFO(r9, r1) - ld r8,TI_FLAGS(r9) - andis. r8,r8,_TIF_EMULATE_STACK_STORE@h + andis. r8,r4,_TIF_EMULATE_STACK_STORE@h beq+ 1f addi r8,r1,INT_FRAME_SIZE /* Get the kprobed function entry */ -- 1.8.3.1