From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:49033 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754816AbcDJR17 (ORCPT ); Sun, 10 Apr 2016 13:27:59 -0400 Subject: Patch "ARC: bitops: Remove non relevant comments" has been added to the 4.4-stable tree To: vgupta@synopsys.com, gregkh@linuxfoundation.org Cc: , From: Date: Sun, 10 Apr 2016 10:27:58 -0700 Message-ID: <14603092781048@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled ARC: bitops: Remove non relevant comments to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: arc-bitops-remove-non-relevant-comments.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 2a41b6dc28dc71c1a3f1622612a26edc58f7561e Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Tue, 8 Mar 2016 19:31:24 +0530 Subject: ARC: bitops: Remove non relevant comments From: Vineet Gupta commit 2a41b6dc28dc71c1a3f1622612a26edc58f7561e upstream. commit 80f420842ff42 removed the ARC bitops microoptimization but failed to prune the comments to same effect Fixes: 80f420842ff42 ("ARC: Make ARC bitops "safer" (add anti-optimization)") Signed-off-by: Vineet Gupta Signed-off-by: Greg Kroah-Hartman --- arch/arc/include/asm/bitops.h | 15 --------------- 1 file changed, 15 deletions(-) --- a/arch/arc/include/asm/bitops.h +++ b/arch/arc/include/asm/bitops.h @@ -35,21 +35,6 @@ static inline void op##_bit(unsigned lon \ m += nr >> 5; \ \ - /* \ - * ARC ISA micro-optimization: \ - * \ - * Instructions dealing with bitpos only consider lower 5 bits \ - * e.g (x << 33) is handled like (x << 1) by ASL instruction \ - * (mem pointer still needs adjustment to point to next word) \ - * \ - * Hence the masking to clamp @nr arg can be elided in general. \ - * \ - * However if @nr is a constant (above assumed in a register), \ - * and greater than 31, gcc can optimize away (x << 33) to 0, \ - * as overflow, given the 32-bit ISA. Thus masking needs to be \ - * done for const @nr, but no code is generated due to gcc \ - * const prop. \ - */ \ nr &= 0x1f; \ \ __asm__ __volatile__( \ Patches currently in stable-queue which might be from vgupta@synopsys.com are queue-4.4/arc-readl-writel-to-work-in-big-endian-cpu-configuration.patch queue-4.4/arc-bitops-remove-non-relevant-comments.patch