From patchwork Tue Sep 3 03:30:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: yukaixiong X-Patchwork-Id: 13787972 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B65221CDA1F; Tue, 3 Sep 2024 03:31:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.188 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725334285; cv=none; b=FZwF81Hn53A6VI7Z4SlH/xkz+Hyh2eC7E9Rd3bX1acBZ24HcDjmLZKyPbWm6KKU2CEjOg03YQ4jWUiuBZks22MZvvZ1Zro+TbbymNuuGxo2u+pZeK7fGpivV+umZmUnSutiku8MYZpY8JYGsTRU7yyNzmnCXDCyYT51IXdXxf/w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725334285; c=relaxed/simple; bh=3eyFF1LrTtWMqy6wT0ABHL0HM48CW1MZ33XuvhnhRdY=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=pd7JbNis2orG4zRSBkrjonpma26Sk/uQWPFIL1FZP5y/BwO4m9xcIXik/jxwjY/lr0mNjyTiUmsTDsjwhX3vjthNZuRZKZ5UUI+ZeTi9MmBTsh+6kKtSGvD2nDiH8jYjf0HrWb+NKok2zFKqDE5wqVIyxnhUdIx3jd1cBc8sCxk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.163.48]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4WyWLy2TBxzgYTY; Tue, 3 Sep 2024 11:29:14 +0800 (CST) Received: from kwepemh100016.china.huawei.com (unknown [7.202.181.102]) by mail.maildlp.com (Postfix) with ESMTPS id E61DD180087; Tue, 3 Sep 2024 11:31:20 +0800 (CST) Received: from huawei.com (10.175.113.32) by kwepemh100016.china.huawei.com (7.202.181.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Tue, 3 Sep 2024 11:31:18 +0800 From: Kaixiong Yu To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 -next 08/15] mm: nommu: move sysctl to its own file Date: Tue, 3 Sep 2024 11:30:04 +0800 Message-ID: <20240903033011.2870608-9-yukaixiong@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240903033011.2870608-1-yukaixiong@huawei.com> References: <20240903033011.2870608-1-yukaixiong@huawei.com> Precedence: bulk X-Mailing-List: linux-sh@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemh100016.china.huawei.com (7.202.181.102) The sysctl_nr_trim_pages belongs to nommu.c, move it into its own file from /kernel/sysctl.c. And remove the useless extern variable declaration from include/linux/mm.h Signed-off-by: Kaixiong Yu --- v2: - fix the build error: expected ';' after top level declarator - fix the build error: call to undeclared function 'register_syscall_init', use 'register_sysctl_init' to replace it. --- include/linux/mm.h | 2 -- kernel/sysctl.c | 10 ---------- mm/nommu.c | 15 ++++++++++++++- 3 files changed, 14 insertions(+), 13 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 93ae80146ee2..b7f12988237a 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -4044,8 +4044,6 @@ unsigned long wp_shared_mapping_range(struct address_space *mapping, pgoff_t first_index, pgoff_t nr); #endif -extern int sysctl_nr_trim_pages; - #ifdef CONFIG_PRINTK void mem_dump_obj(void *object); #else diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 0c0bab3dad7d..d3de31ec74bf 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2041,16 +2041,6 @@ static struct ctl_table vm_table[] = { .extra1 = SYSCTL_ONE, .extra2 = SYSCTL_FOUR, }, -#ifndef CONFIG_MMU - { - .procname = "nr_trim_pages", - .data = &sysctl_nr_trim_pages, - .maxlen = sizeof(sysctl_nr_trim_pages), - .mode = 0644, - .proc_handler = proc_dointvec_minmax, - .extra1 = SYSCTL_ZERO, - }, -#endif { .procname = "vfs_cache_pressure", .data = &sysctl_vfs_cache_pressure, diff --git a/mm/nommu.c b/mm/nommu.c index 385b0c15add8..48b2812f492a 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -48,7 +48,6 @@ struct page *mem_map; unsigned long max_mapnr; EXPORT_SYMBOL(max_mapnr); unsigned long highest_memmap_pfn; -int sysctl_nr_trim_pages = CONFIG_NOMMU_INITIAL_TRIM_EXCESS; int heap_stack_gap = 0; atomic_long_t mmap_pages_allocated; @@ -392,6 +391,19 @@ SYSCALL_DEFINE1(brk, unsigned long, brk) return mm->brk = brk; } +static int sysctl_nr_trim_pages = CONFIG_NOMMU_INITIAL_TRIM_EXCESS; + +static struct ctl_table nommu_table[] = { + { + .procname = "nr_trim_pages", + .data = &sysctl_nr_trim_pages, + .maxlen = sizeof(sysctl_nr_trim_pages), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ZERO, + }, +}; + /* * initialise the percpu counter for VM and region record slabs */ @@ -402,6 +414,7 @@ void __init mmap_init(void) ret = percpu_counter_init(&vm_committed_as, 0, GFP_KERNEL); VM_BUG_ON(ret); vm_region_jar = KMEM_CACHE(vm_region, SLAB_PANIC|SLAB_ACCOUNT); + register_sysctl_init("vm", nommu_table); } /*