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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_PASS 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 C5313C43441 for ; Wed, 14 Nov 2018 21:05:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 83E88223DD for ; Wed, 14 Nov 2018 21:05:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 83E88223DD Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-btrfs-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728178AbeKOHKL (ORCPT ); Thu, 15 Nov 2018 02:10:11 -0500 Received: from mx2.suse.de ([195.135.220.15]:39766 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726015AbeKOHKK (ORCPT ); Thu, 15 Nov 2018 02:10:10 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 40330AC38 for ; Wed, 14 Nov 2018 21:05:18 +0000 (UTC) Subject: Re: [PATCH 6/6] btrfs: unconditionally provide function prototypes from free-space-tree.h To: dsterba@suse.cz, Johannes Thumshirn , David Sterba , Linux BTRFS Mailinglist References: <20181114133520.16069-1-jthumshirn@suse.de> <20181114133520.16069-7-jthumshirn@suse.de> <20181114195325.GK24115@twin.jikos.cz> From: Nikolay Borisov Openpgp: preference=signencrypt Autocrypt: addr=nborisov@suse.com; prefer-encrypt=mutual; keydata= xsFNBFiKBz4BEADNHZmqwhuN6EAzXj9SpPpH/nSSP8YgfwoOqwrP+JR4pIqRK0AWWeWCSwmZ T7g+RbfPFlmQp+EwFWOtABXlKC54zgSf+uulGwx5JAUFVUIRBmnHOYi/lUiE0yhpnb1KCA7f u/W+DkwGerXqhhe9TvQoGwgCKNfzFPZoM+gZrm+kWv03QLUCr210n4cwaCPJ0Nr9Z3c582xc bCUVbsjt7BN0CFa2BByulrx5xD9sDAYIqfLCcZetAqsTRGxM7LD0kh5WlKzOeAXj5r8DOrU2 GdZS33uKZI/kZJZVytSmZpswDsKhnGzRN1BANGP8sC+WD4eRXajOmNh2HL4P+meO1TlM3GLl EQd2shHFY0qjEo7wxKZI1RyZZ5AgJnSmehrPCyuIyVY210CbMaIKHUIsTqRgY5GaNME24w7h TyyVCy2qAM8fLJ4Vw5bycM/u5xfWm7gyTb9V1TkZ3o1MTrEsrcqFiRrBY94Rs0oQkZvunqia c+NprYSaOG1Cta14o94eMH271Kka/reEwSZkC7T+o9hZ4zi2CcLcY0DXj0qdId7vUKSJjEep c++s8ncFekh1MPhkOgNj8pk17OAESanmDwksmzh1j12lgA5lTFPrJeRNu6/isC2zyZhTwMWs k3LkcTa8ZXxh0RfWAqgx/ogKPk4ZxOXQEZetkEyTFghbRH2BIwARAQABzSJOaWtvbGF5IEJv cmlzb3YgPG5ib3Jpc292QHN1c2UuZGU+wsF4BBMBAgAiBQJYijkSAhsDBgsJCAcDAgYVCAIJ CgsEFgIDAQIeAQIXgAAKCRBxvoJG5T8oV/B6D/9a8EcRPdHg8uLEPywuJR8URwXzkofT5bZE IfGF0Z+Lt2ADe+nLOXrwKsamhweUFAvwEUxxnndovRLPOpWerTOAl47lxad08080jXnGfYFS Dc+ew7C3SFI4tFFHln8Y22Q9075saZ2yQS1ywJy+TFPADIprAZXnPbbbNbGtJLoq0LTiESnD w/SUC6sfikYwGRS94Dc9qO4nWyEvBK3Ql8NkoY0Sjky3B0vL572Gq0ytILDDGYuZVo4alUs8 LeXS5ukoZIw1QYXVstDJQnYjFxYgoQ5uGVi4t7FsFM/6ykYDzbIPNOx49Rbh9W4uKsLVhTzG BDTzdvX4ARl9La2kCQIjjWRg+XGuBM5rxT/NaTS78PXjhqWNYlGc5OhO0l8e5DIS2tXwYMDY LuHYNkkpMFksBslldvNttSNei7xr5VwjVqW4vASk2Aak5AleXZS+xIq2FADPS/XSgIaepyTV tkfnyreep1pk09cjfXY4A7qpEFwazCRZg9LLvYVc2M2eFQHDMtXsH59nOMstXx2OtNMcx5p8 0a5FHXE/HoXz3p9bD0uIUq6p04VYOHsMasHqHPbsMAq9V2OCytJQPWwe46bBjYZCOwG0+x58 fBFreP/NiJNeTQPOa6FoxLOLXMuVtpbcXIqKQDoEte9aMpoj9L24f60G4q+pL/54ql2VRscK d87BTQRYigc+ARAAyJSq9EFk28++SLfg791xOh28tLI6Yr8wwEOvM3wKeTfTZd+caVb9gBBy wxYhIopKlK1zq2YP7ZjTP1aPJGoWvcQZ8fVFdK/1nW+Z8/NTjaOx1mfrrtTGtFxVBdSCgqBB jHTnlDYV1R5plJqK+ggEP1a0mr/rpQ9dFGvgf/5jkVpRnH6BY0aYFPprRL8ZCcdv2DeeicOO YMobD5g7g/poQzHLLeT0+y1qiLIFefNABLN06Lf0GBZC5l8hCM3Rpb4ObyQ4B9PmL/KTn2FV Xq/c0scGMdXD2QeWLePC+yLMhf1fZby1vVJ59pXGq+o7XXfYA7xX0JsTUNxVPx/MgK8aLjYW hX+TRA4bCr4uYt/S3ThDRywSX6Hr1lyp4FJBwgyb8iv42it8KvoeOsHqVbuCIGRCXqGGiaeX Wa0M/oxN1vJjMSIEVzBAPi16tztL/wQtFHJtZAdCnuzFAz8ue6GzvsyBj97pzkBVacwp3/Mw qbiu7sDz7yB0d7J2tFBJYNpVt/Lce6nQhrvon0VqiWeMHxgtQ4k92Eja9u80JDaKnHDdjdwq FUikZirB28UiLPQV6PvCckgIiukmz/5ctAfKpyYRGfez+JbAGl6iCvHYt/wAZ7Oqe/3Cirs5 KhaXBcMmJR1qo8QH8eYZ+qhFE3bSPH446+5oEw8A9v5oonKV7zMAEQEAAcLBXwQYAQIACQUC WIoHPgIbDAAKCRBxvoJG5T8oV1pyD/4zdXdOL0lhkSIjJWGqz7Idvo0wjVHSSQCbOwZDWNTN JBTP0BUxHpPu/Z8gRNNP9/k6i63T4eL1xjy4umTwJaej1X15H8Hsh+zakADyWHadbjcUXCkg OJK4NsfqhMuaIYIHbToi9K5pAKnV953xTrK6oYVyd/Rmkmb+wgsbYQJ0Ur1Ficwhp6qU1CaJ mJwFjaWaVgUERoxcejL4ruds66LM9Z1Qqgoer62ZneID6ovmzpCWbi2sfbz98+kW46aA/w8r 7sulgs1KXWhBSv5aWqKU8C4twKjlV2XsztUUsyrjHFj91j31pnHRklBgXHTD/pSRsN0UvM26 lPs0g3ryVlG5wiZ9+JbI3sKMfbdfdOeLxtL25ujs443rw1s/PVghphoeadVAKMPINeRCgoJH zZV/2Z/myWPRWWl/79amy/9MfxffZqO9rfugRBORY0ywPHLDdo9Kmzoxoxp9w3uTrTLZaT9M KIuxEcV8wcVjr+Wr9zRl06waOCkgrQbTPp631hToxo+4rA1jiQF2M80HAet65ytBVR2pFGZF zGYYLqiG+mpUZ+FPjxk9kpkRYz61mTLSY7tuFljExfJWMGfgSg1OxfLV631jV1TcdUnx+h3l Sqs2vMhAVt14zT8mpIuu2VNxcontxgVr1kzYA/tQg32fVRbGr449j1gw57BV9i0vww== Message-ID: <3f14522d-ea93-4be0-2787-aac9916d257c@suse.com> Date: Wed, 14 Nov 2018 23:05:16 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20181114195325.GK24115@twin.jikos.cz> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 14.11.18 г. 21:53 ч., David Sterba wrote: > On Wed, Nov 14, 2018 at 02:54:37PM +0100, Johannes Thumshirn wrote: >> On 14/11/2018 14:52, Nikolay Borisov wrote: >>> I agree with this patch, however you go into the gray area of >>> "everything which is exported should have btrfs_ prefix". It's up to >>> David to see if he is content with this change. >> >> Yep you're right. I think I should change it, but I'll wait for David's >> response first. > > There's one prior example of the conditionally exported functions: > btrfs_find_lock_delalloc_range . This function declaration and > definition are under the ifdef and it's a simple wrapper around a static > function find_lock_delalloc_range. I have a patch which actually simplifies this somewhat because, frankly I find it stupid and redundant to do this frickin' dance for functions which are used only in debugging. Here is the diff (still not submitted since it's waiting for some other cleanups to be merged): --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1556,10 +1556,13 @@ static noinline int lock_delalloc_pages(struct inode *inode, * * 1 is returned if we find something, 0 if nothing was in the tree */ -static noinline_for_stack u64 find_lock_delalloc_range(struct inode *inode, - struct extent_io_tree *tree, - struct page *locked_page, u64 *start, - u64 *end) +#ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS +static +#endif +noinline_for_stack u64 find_lock_delalloc_range(struct inode *inode, + struct extent_io_tree *tree, + struct page *locked_page, + u64 *start, u64 *end) { u64 max_bytes = BTRFS_MAX_EXTENT_SIZE; u64 delalloc_start; @@ -1637,16 +1640,6 @@ static noinline_for_stack u64 find_lock_delalloc_range(struct inode *inode, return found; } -#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS -u64 btrfs_find_lock_delalloc_range(struct inode *inode, - struct extent_io_tree *tree, - struct page *locked_page, u64 *start, - u64 *end) -{ - return find_lock_delalloc_range(inode, tree, locked_page, start, end); -} -#endif - static int __process_pages_contig(struct address_space *mapping, struct page *locked_page, pgoff_t start_index, pgoff_t end_index, diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 30bfeefa2d89..12d300fae7a0 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -522,10 +522,8 @@ int free_io_failure(struct extent_io_tree *failure_tree, struct extent_io_tree *io_tree, struct io_failure_record *rec); #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS -u64 btrfs_find_lock_delalloc_range(struct inode *inode, - struct extent_io_tree *tree, - struct page *locked_page, u64 *start, - u64 *end); +u64 find_lock_delalloc_range(struct inode *inode, struct extent_io_tree *tree, + struct page *locked_page, u64 *start, u64 *end); #endif struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info, > > I'd do the same for the functions in your list, where applies. A static > function can be better optimized and I don't want to make it harder for > the compiler just to have it exported for the tests. They're not enabled > by default and never in production builds. > > So: > > free-space-tree.h: > > #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS > > struct btrfs_free_space_info *btrfs_search_free_space_info( > struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, > struct btrfs_block_group_cache *block_group, struct btrfs_path *path, > int cow); > ... > > #endif > > free-space-tree.c: > > #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS > > struct btrfs_free_space_info *btrfs_search_free_space_info( > struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, > struct btrfs_block_group_cache *block_group, struct btrfs_path *path, > int cow) > { > return search_free_space_info(trans, fs_info, block_group, path, cow); > } > > ... > > #endif > > I hope it's a reasonable compromise among the options. >