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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 E501DC2D0DB for ; Tue, 28 Jan 2020 14:00:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BA70B2173E for ; Tue, 28 Jan 2020 14:00:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580220043; bh=PI76T7wRktqWv/er7Vty22KqvtsQjMkIOvWAKnFroPg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ALqZsLN13daSoGGMj8Cy7JdsPEKGZh7ayKkpUIq9Jo96wIDsNWzA/SmXeMPyl7D6w TX7SkludjUbnrUXv0EC5N+E1OGM4Ca39toTca54RqtWqYJvI+x8qUKHZw2wYq5QvOg VR4wXMQ7rcqQwAIOOSGf6h7NRa/rWpacTsk8qb5s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727283AbgA1OAm (ORCPT ); Tue, 28 Jan 2020 09:00:42 -0500 Received: from mail.kernel.org ([198.145.29.99]:45442 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727142AbgA1N7z (ORCPT ); Tue, 28 Jan 2020 08:59:55 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 57A1824685; Tue, 28 Jan 2020 13:59:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580219994; bh=PI76T7wRktqWv/er7Vty22KqvtsQjMkIOvWAKnFroPg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jhtwNOXKkY71gNNreIXBJaIuezqBz3asdQe4BtvrPXAYa4C9fiOEVJWeGLWh71AvW CeDo7caWJ2gYB7mE/5uUlFvIagF12QICNHKc4U3f2D4YlYnhNPVhKwkbVIFX3Nx+9J pb+ODbWl0Q28W/h9A0wKq4fcDPdiEHI9P0smtJPU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andy Shevchenko , Dmitry Torokhov Subject: [PATCH 4.14 44/46] bitmap: Add bitmap_alloc(), bitmap_zalloc() and bitmap_free() Date: Tue, 28 Jan 2020 14:58:18 +0100 Message-Id: <20200128135755.490249079@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200128135749.822297911@linuxfoundation.org> References: <20200128135749.822297911@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andy Shevchenko commit c42b65e363ce97a828f81b59033c3558f8fa7f70 upstream. A lot of code become ugly because of open coding allocations for bitmaps. Introduce three helpers to allow users be more clear of intention and keep their code neat. Note, due to multiple circular dependencies we may not provide the helpers as inliners. For now we keep them exported and, perhaps, at some point in the future we will sort out header inclusion and inheritance. Signed-off-by: Andy Shevchenko Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- include/linux/bitmap.h | 8 ++++++++ lib/bitmap.c | 20 ++++++++++++++++++++ 2 files changed, 28 insertions(+) --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -87,6 +87,14 @@ */ /* + * Allocation and deallocation of bitmap. + * Provided in lib/bitmap.c to avoid circular dependency. + */ +extern unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags); +extern unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags); +extern void bitmap_free(const unsigned long *bitmap); + +/* * lib/bitmap.c provides these functions: */ --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include @@ -1212,3 +1213,22 @@ void bitmap_copy_le(unsigned long *dst, } EXPORT_SYMBOL(bitmap_copy_le); #endif + +unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags) +{ + return kmalloc_array(BITS_TO_LONGS(nbits), sizeof(unsigned long), + flags); +} +EXPORT_SYMBOL(bitmap_alloc); + +unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags) +{ + return bitmap_alloc(nbits, flags | __GFP_ZERO); +} +EXPORT_SYMBOL(bitmap_zalloc); + +void bitmap_free(const unsigned long *bitmap) +{ + kfree(bitmap); +} +EXPORT_SYMBOL(bitmap_free);