From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-391662-1516223387-2-13859987140943450983 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-usb-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1516223387; b=viq2+1t5u4QtTcVbCR0FsPZZ0eP21saKn/avREJ3zyqZTQn sRT7xaSKMVsTb6w6KelRi34xZiAKkP+0LHC95QQuheZY7OORwueyUHsERkGmMJ4d Nelxvov0iZR0VHJuEYknl+3/63NI/YvkV+eJjI0Vh6H0/0AfuxHh0QIOAql+25eU DjI5eFFXkTT9yLRTV/ckyxKPeAMiROEJj6dt7zBTG3NPnE++f9tdomvK5FiQ2n+q x0w29FVnOqBS1OERY9qddsQiZs0d389mYwsPNWkMXE7z1BAB6iSRrGHZ8rhZ6JDg jhnpwIY8TpC7/JuhMKST6LMWPzsJOjET9FWLS7Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:sender:list-id; s=arctest; t=1516223387; bh=BKtks+2vqsbZnjAo17/aQKaoTbSxNWFr7u8GfHQckbI=; b=QCDkAJ4h22SL 0ZNsGSes1OuIYiJ2IsV/EiglMPKFC3VPKGWNCh5kAYOdXpY7+zBZ3MwyLt/j+tAB zUuCPD2NCdo+KiQKJ3OxSrffOnSEH6b4PmsKJzjORM59WfA+GVa+RfLsbTaORQZu M5UGSbsNxt9D4+1O6zsdViKyo5EV0bWXoeMPfuMHQpxDFgyPpU1Y0PACJ/nvoOx+ DrQVjP2j4uXPt7zCRL386MNFAeUtxf0SfvNY283JIaxkrO8KGAmnRZq4r/nV7yg7 VrfjENhLkXlG4g/hWG/tSWUSWtklOG83IXzijXZtWfGpnaviYoaCGjeSuPYZ3+BS SPxZwDzmMA== ARC-Authentication-Results: i=1; mx1.messagingengine.com; arc=none (no signatures found); dkim=fail (message has been altered; 2048-bit rsa key sha256) header.d=infradead.org header.i=@infradead.org header.b=s432/WlH x-bits=2048 x-keytype=rsa x-algorithm=sha256 x-selector=bombadil.20170209; dmarc=none (p=none,has-list-id=yes,d=none) header.from=infradead.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-usb-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=infradead.org header.result=pass header_is_org_domain=yes Authentication-Results: mx1.messagingengine.com; arc=none (no signatures found); dkim=fail (message has been altered; 2048-bit rsa key sha256) header.d=infradead.org header.i=@infradead.org header.b=s432/WlH x-bits=2048 x-keytype=rsa x-algorithm=sha256 x-selector=bombadil.20170209; dmarc=none (p=none,has-list-id=yes,d=none) header.from=infradead.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-usb-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=infradead.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754745AbeAQVJm (ORCPT ); Wed, 17 Jan 2018 16:09:42 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:49537 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753462AbeAQUWc (ORCPT ); Wed, 17 Jan 2018 15:22:32 -0500 From: Matthew Wilcox To: linux-kernel@vger.kernel.org Cc: Matthew Wilcox , linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-nilfs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-usb@vger.kernel.org, Bjorn Andersson , Stefano Stabellini , iommu@lists.linux-foundation.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, intel-gfx@lists.freedesktop.org, cgroups@vger.kernel.org, linux-sh@vger.kernel.org, David Howells Subject: [PATCH v6 16/99] xarray: Add xas_create_range Date: Wed, 17 Jan 2018 12:20:40 -0800 Message-Id: <20180117202203.19756-17-willy@infradead.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180117202203.19756-1-willy@infradead.org> References: <20180117202203.19756-1-willy@infradead.org> Sender: linux-usb-owner@vger.kernel.org X-Mailing-List: linux-usb@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Matthew Wilcox This hopefully temporary function is useful for users who have not yet been converted to multi-index entries. Signed-off-by: Matthew Wilcox --- include/linux/xarray.h | 2 ++ lib/xarray.c | 22 ++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/include/linux/xarray.h b/include/linux/xarray.h index 01ce313fc00e..acb6d02ff194 100644 --- a/include/linux/xarray.h +++ b/include/linux/xarray.h @@ -705,6 +705,8 @@ void xas_init_tags(const struct xa_state *); bool xas_nomem(struct xa_state *, gfp_t); void xas_pause(struct xa_state *); +void xas_create_range(struct xa_state *, unsigned long max); + /** * xas_reload() - Refetch an entry from the xarray. * @xas: XArray operation state. diff --git a/lib/xarray.c b/lib/xarray.c index e8ece1fff9fd..c044373d6893 100644 --- a/lib/xarray.c +++ b/lib/xarray.c @@ -612,6 +612,28 @@ void *xas_create(struct xa_state *xas) } EXPORT_SYMBOL_GPL(xas_create); +/** + * xas_create_range() - Ensure that stores to this range will succeed + * @xas: XArray operation state. + * @max: The highest index to create a slot for. + * + * Creates all of the slots in the range between the current position of + * @xas and @max. This is for the benefit of users who have not yet been + * converted to multi-index entries. + * + * The implementation is naive. + */ +void xas_create_range(struct xa_state *xas, unsigned long max) +{ + XA_STATE(tmp, xas->xa, xas->xa_index); + + do { + xas_create(&tmp); + xas_set(&tmp, tmp.xa_index + XA_CHUNK_SIZE); + } while (tmp.xa_index < max); +} +EXPORT_SYMBOL_GPL(xas_create_range); + static void store_siblings(struct xa_state *xas, void *entry, void *curr, int *countp, int *valuesp) { -- 2.15.1