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=-3.9 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,URIBL_BLOCKED autolearn=no 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 6B37CC2BA80 for ; Tue, 7 Apr 2020 03:09:21 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 30C8F20716 for ; Tue, 7 Apr 2020 03:09:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="HTUdh4iV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 30C8F20716 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 6FC1D8E0069; Mon, 6 Apr 2020 23:09:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5BDC28E0062; Mon, 6 Apr 2020 23:09:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4D4EE8E0069; Mon, 6 Apr 2020 23:09:19 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0063.hostedemail.com [216.40.44.63]) by kanga.kvack.org (Postfix) with ESMTP id 327208E0062 for ; Mon, 6 Apr 2020 23:09:19 -0400 (EDT) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 0176F99BE for ; Tue, 7 Apr 2020 03:09:19 +0000 (UTC) X-FDA: 76679578038.10.bite17_8b82fd763c027 X-HE-Tag: bite17_8b82fd763c027 X-Filterd-Recvd-Size: 5024 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf37.hostedemail.com (Postfix) with ESMTP for ; Tue, 7 Apr 2020 03:09:18 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (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 AD8722137B; Tue, 7 Apr 2020 03:09:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586228957; bh=jXsEm9/CCcG+Li/O2tgpVM7tjDneZOLXKtGjYy8l/AM=; h=Date:From:To:Subject:In-Reply-To:From; b=HTUdh4iV/TAZreuUnkqbm9aF4huadLMCmOflXivDHFqJWQGoB3rIVt9m72knyJq3z nlQm12mj1Yn6fgcsa8dEDXHm4XkWlQP4XeTPwjkSwTjYlGQm71oAtdA27PZyHT0FH3 sVMijsFDeTs4NiKwRmjv8LaGBBLKkpfwwQKvtznc= Date: Mon, 06 Apr 2020 20:09:17 -0700 From: Andrew Morton To: adobriyan@gmail.com, akpm@linux-foundation.org, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, willy@infradead.org Subject: [patch 099/166] seq_file: remove m->version Message-ID: <20200407030917.YHjyJJa_y%akpm@linux-foundation.org> In-Reply-To: <20200406200254.a69ebd9e08c4074e41ddebaf@linux-foundation.org> User-Agent: s-nail v14.8.16 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)" Subject: seq_file: remove m->version The process maps file was the only user of version (introduced back in 2005). Now that it uses ppos instead, we can remove it. Link: http://lkml.kernel.org/r/20200317193201.9924-4-adobriyan@gmail.com Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton --- fs/seq_file.c | 28 ---------------------------- include/linux/seq_file.h | 1 - 2 files changed, 29 deletions(-) --- a/fs/seq_file.c~seq_file-remove-m-version +++ a/fs/seq_file.c @@ -68,13 +68,6 @@ int seq_open(struct file *file, const st p->file = file; /* - * Wrappers around seq_open(e.g. swaps_open) need to be - * aware of this. If they set f_version themselves, they - * should call seq_open first and then set f_version. - */ - file->f_version = 0; - - /* * seq_files support lseek() and pread(). They do not implement * write() at all, but we clear FMODE_PWRITE here for historical * reasons. @@ -94,7 +87,6 @@ static int traverse(struct seq_file *m, int error = 0; void *p; - m->version = 0; m->index = 0; m->count = m->from = 0; if (!offset) @@ -161,25 +153,11 @@ ssize_t seq_read(struct file *file, char mutex_lock(&m->lock); /* - * seq_file->op->..m_start/m_stop/m_next may do special actions - * or optimisations based on the file->f_version, so we want to - * pass the file->f_version to those methods. - * - * seq_file->version is just copy of f_version, and seq_file - * methods can treat it simply as file version. - * It is copied in first and copied out after all operations. - * It is convenient to have it as part of structure to avoid the - * need of passing another argument to all the seq_file methods. - */ - m->version = file->f_version; - - /* * if request is to read from zero offset, reset iterator to first * record as it might have been already advanced by previous requests */ if (*ppos == 0) { m->index = 0; - m->version = 0; m->count = 0; } @@ -190,7 +168,6 @@ ssize_t seq_read(struct file *file, char if (err) { /* With prejudice... */ m->read_pos = 0; - m->version = 0; m->index = 0; m->count = 0; goto Done; @@ -243,7 +220,6 @@ ssize_t seq_read(struct file *file, char m->buf = seq_buf_alloc(m->size <<= 1); if (!m->buf) goto Enomem; - m->version = 0; p = m->op->start(m, &m->index); } m->op->stop(m, p); @@ -287,7 +263,6 @@ Done: *ppos += copied; m->read_pos += copied; } - file->f_version = m->version; mutex_unlock(&m->lock); return copied; Enomem: @@ -313,7 +288,6 @@ loff_t seq_lseek(struct file *file, loff loff_t retval = -EINVAL; mutex_lock(&m->lock); - m->version = file->f_version; switch (whence) { case SEEK_CUR: offset += file->f_pos; @@ -329,7 +303,6 @@ loff_t seq_lseek(struct file *file, loff /* with extreme prejudice... */ file->f_pos = 0; m->read_pos = 0; - m->version = 0; m->index = 0; m->count = 0; } else { @@ -340,7 +313,6 @@ loff_t seq_lseek(struct file *file, loff file->f_pos = offset; } } - file->f_version = m->version; mutex_unlock(&m->lock); return retval; } --- a/include/linux/seq_file.h~seq_file-remove-m-version +++ a/include/linux/seq_file.h @@ -21,7 +21,6 @@ struct seq_file { size_t pad_until; loff_t index; loff_t read_pos; - u64 version; struct mutex lock; const struct seq_operations *op; int poll_event; _