From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.5 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6F5FDC2BA2B for ; Thu, 16 Apr 2020 22:01:51 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3135321973 for ; Thu, 16 Apr 2020 22:01:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="aMME+MNY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3135321973 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 026DB8E00E5; Thu, 16 Apr 2020 18:01:37 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EDDB28E00EA; Thu, 16 Apr 2020 18:01:36 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B55E38E00E7; Thu, 16 Apr 2020 18:01:36 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 6E63A8E00E5 for ; Thu, 16 Apr 2020 18:01:36 -0400 (EDT) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 1017B181AEF3E for ; Thu, 16 Apr 2020 22:01:36 +0000 (UTC) X-FDA: 76715090592.30.lunch85_47e85e5a21f23 X-HE-Tag: lunch85_47e85e5a21f23 X-Filterd-Recvd-Size: 3043 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf27.hostedemail.com (Postfix) with ESMTP for ; Thu, 16 Apr 2020 22:01:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=nmKYsVSv4smDodVL2/EUYaTguUsR/Ex0MPhnNYWkhvM=; b=aMME+MNYdms7Ih9rtacNDLcg/c WFRzYcOwp6t/SSdq/KA0wVFtLP3IyoRhE6iwEK+lGj+TxpxYIuPAiHfbUNQanCt02I9qWL+xTfdpZ tJLtw3JNY2dXNEWXprYuCMtR7XXmlsD+bniBwAAQWEVJnRTIP3cPVwrpf615XgUgoYqfJ3VAKNpCM waet0YP7fNXuENYU/V6DzMxy2r18OWZ7PQ8YPk/Tbtdaj48vrq6yo3Pbffv/+5jbOtuUsXnbOvP2+ GuUPoEnESGqkhMAaa38qobACwzyx4Vl1OpQPZ8Tb8j5uVeGOaZ4b1Eu806h8Jjk+lD9Rc19JJOC6P 5Rk36LuA==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1jPCZg-0003UF-Ee; Thu, 16 Apr 2020 22:01:32 +0000 From: Matthew Wilcox To: linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , Tony Luck , Fenghua Yu , linux-ia64@vger.kernel.org Subject: [PATCH v3 02/11] ia64: Add clear_bit_unlock_is_negative_byte implementation Date: Thu, 16 Apr 2020 15:01:21 -0700 Message-Id: <20200416220130.13343-3-willy@infradead.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200416220130.13343-1-willy@infradead.org> References: <20200416220130.13343-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: "Matthew Wilcox (Oracle)" Copy and paste the clear_bit_unlock() implementation, and test the old variable to see if it has bit 7 set. Signed-off-by: Matthew Wilcox (Oracle) Cc: Tony Luck Cc: Fenghua Yu Cc: linux-ia64@vger.kernel.org --- arch/ia64/include/asm/bitops.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/ia64/include/asm/bitops.h b/arch/ia64/include/asm/bitop= s.h index 2f24ee6459d2..ba92ca44731b 100644 --- a/arch/ia64/include/asm/bitops.h +++ b/arch/ia64/include/asm/bitops.h @@ -117,6 +117,26 @@ clear_bit_unlock (int nr, volatile void *addr) } while (cmpxchg_rel(m, old, new) !=3D old); } =20 +static inline bool clear_bit_unlock_is_negative_byte(unsigned int nr, + volatile unsigned long *p) +{ + __u32 mask, old, new; + volatile __u32 *m; + CMPXCHG_BUGCHECK_DECL + + m =3D (volatile __u32 *) addr + (nr >> 5); + mask =3D ~(1 << (nr & 31)); + do { + CMPXCHG_BUGCHECK(m); + old =3D *m; + new =3D old & mask; + } while (cmpxchg_rel(m, old, new) !=3D old); + + return old & (1 << 7); +} +#define clear_bit_unlock_is_negative_byte \ + clear_bit_unlock_is_negative_byte + /** * __clear_bit_unlock - Non-atomically clears a bit in memory with relea= se * @nr: Bit to clear --=20 2.25.1