From patchwork Fri Jun 15 13:20:15 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 10466455 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E257160384 for ; Fri, 15 Jun 2018 13:21:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D24A728D63 for ; Fri, 15 Jun 2018 13:21:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C650728D69; Fri, 15 Jun 2018 13:21:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 727E928D63 for ; Fri, 15 Jun 2018 13:21:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965805AbeFONUb (ORCPT ); Fri, 15 Jun 2018 09:20:31 -0400 Received: from mga01.intel.com ([192.55.52.88]:8738 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965798AbeFONU3 (ORCPT ); Fri, 15 Jun 2018 09:20:29 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Jun 2018 06:20:29 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,227,1526367600"; d="scan'208";a="64853040" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga001.jf.intel.com with ESMTP; 15 Jun 2018 06:20:17 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 6497232B; Fri, 15 Jun 2018 16:20:18 +0300 (EEST) From: Andy Shevchenko To: Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Shaohua Li , linux-raid@vger.kernel.org, Dmitry Torokhov , linux-input@vger.kernel.org, Andrew Morton , Yury Norov , linux-kernel@vger.kernel.org, mika.westerberg@linux.intel.com Cc: Andy Shevchenko Subject: [PATCH v2 3/5] bitmap: Add bitmap_alloc(), bitmap_zalloc() and bitmap_free() Date: Fri, 15 Jun 2018 16:20:15 +0300 Message-Id: <20180615132017.23889-4-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180615132017.23889-1-andriy.shevchenko@linux.intel.com> References: <20180615132017.23889-1-andriy.shevchenko@linux.intel.com> Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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. Signed-off-by: Andy Shevchenko --- include/linux/bitmap.h | 8 ++++++++ lib/bitmap.c | 19 +++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 1ee46f492267..acf5e8df3504 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -104,6 +104,14 @@ * contain all bit positions from 0 to 'bits' - 1. */ +/* + * 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: */ diff --git a/lib/bitmap.c b/lib/bitmap.c index 33e95cd359a2..09acf2fd6a35 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include @@ -1125,6 +1126,24 @@ void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int n 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); + #if BITS_PER_LONG == 64 /** * bitmap_from_arr32 - copy the contents of u32 array of bits to bitmap