From patchwork Mon Aug 28 07:54:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xueshi Hu X-Patchwork-Id: 13367656 Received: from mail-pl1-f195.google.com (mail-pl1-f195.google.com [209.85.214.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 04E0310F4 for ; Mon, 28 Aug 2023 07:58:23 +0000 (UTC) Received: by mail-pl1-f195.google.com with SMTP id d9443c01a7336-1c0d0bf18d6so23008785ad.0 for ; Mon, 28 Aug 2023 00:58:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=smartx-com.20221208.gappssmtp.com; s=20221208; t=1693209503; x=1693814303; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=k/QhZG6ZDZ8kFya2emkAkHMTf8vyMHNtbVCiU5m1tXU=; b=VRbPxyeENdl3s1Qey3hv6yOlZ+4CfxWyDhTKUoUUymqkuI5AP/WJxQYPM820UoSUL9 mASd9g8eED4jR5/UGsvPMM8Iq0mGYCyDj5+27xZ2APl3EDzsyBUjjIr1Z5cP1yPafCnH VEIaYfvDmVMLmwGul5InZHe434etHpqOAgOIso2MFC422b6qVaJ5khu2gCC9fIEx5mEX wrEZLQ0TsTAayd1qneRDw5nHqqlg8MzfhWBEmclhJRhkwfdvTRAULmC3atVB1e9ankYI HlCP7jetH6AKg+/M+j0qDyDD3cYZ6RXcqRjk2PEt4HzN6R1d2iGYXpPtQVxoLdsblBE3 MzDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693209503; x=1693814303; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=k/QhZG6ZDZ8kFya2emkAkHMTf8vyMHNtbVCiU5m1tXU=; b=Ubfyas08hj7RAjHkIEJg/zuzIYn0hMqqSNDGIvlvx1SgtFDWZO5RwPlgVU48qVJUBV 9daMHjGIThVpl5Yo3hsNM87IAX7sIYVT1WZKwfL83B2FYAA75kiEHKUJrYdMzAQ1PKPu y9IndDLJv1SO4b9uGf8H7GWIZ3hGbr5HjPQ1GMbLXCfwhH9Us6HWXHhWG0EJ038aNAFs v2W37Rhe32+DQoHpSbkD4KgWSVTP9U6HauHu5M36RxnTNuUbSc23+4lst/QpzG/4Ikbt 4ltWzDtsfFTNVF/+7HtVPPuqK5mOTffNhwNDCYdnb/gtEBK8pE+KGy+PRbxMtSFD9x4g /1tg== X-Gm-Message-State: AOJu0YyCd+7s+9C9upR5WBPDMnlFM4C0svJ9DA+ghMtcmRgfGMVSZe1k 9aJ/MDeCeL0dAvezEKpHVoTRDQ== X-Google-Smtp-Source: AGHT+IFajBr6AnYgt/7FmhK0WkzPHs+3hSx8KYTxkpY+YHQONQ8b8t1fBHX+N/4s0hTxlKIr6q/SNQ== X-Received: by 2002:a17:90a:df07:b0:268:ac3:b1f6 with SMTP id gp7-20020a17090adf0700b002680ac3b1f6mr21616297pjb.24.1693209503018; Mon, 28 Aug 2023 00:58:23 -0700 (PDT) Received: from nixos.tailf4e9e.ts.net ([8.210.91.195]) by smtp.googlemail.com with ESMTPSA id ds1-20020a17090b08c100b00262e485156esm8269343pjb.57.2023.08.28.00.58.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Aug 2023 00:58:22 -0700 (PDT) From: Xueshi Hu To: hch@infradead.org, dan.j.williams@intel.com, vishal.l.verma@intel.com, dave.jiang@intel.com, jayalk@intworks.biz, daniel@ffwll.ch, deller@gmx.de, bcrl@kvack.org, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.com, tytso@mit.edu, adilger.kernel@dilger.ca, miklos@szeredi.hu, mike.kravetz@oracle.com, muchun.song@linux.dev, djwong@kernel.org, willy@infradead.org, akpm@linux-foundation.org, hughd@google.com Cc: nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, Xueshi Hu Subject: [PATCH v2] fs: clean up usage of noop_dirty_folio Date: Mon, 28 Aug 2023 15:54:49 +0800 Message-Id: <20230828075449.262510-1-xueshi.hu@smartx.com> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In folio_mark_dirty(), it can automatically fallback to noop_dirty_folio() if a_ops->dirty_folio is not registered. As anon_aops, dev_dax_aops and fb_deferred_io_aops becames empty, remove them too. Signed-off-by: Xueshi Hu Reviewed-by: Jan Kara Reviewed-by: Christoph Hellwig Reviewed-by: Matthew Wilcox (Oracle) Acked-by: Al Viro --- Changes in v2: - make noop_dirty_folio() inline as suggested by Matthew - v1: https://lore.kernel.org/linux-mm/ZOxAfrz9etoVUfLQ@infradead.org/T/#m073d45909b1df03ff09f382557dc4e84d0607c49 drivers/dax/device.c | 5 ----- drivers/video/fbdev/core/fb_defio.c | 5 ----- fs/aio.c | 1 - fs/ext2/inode.c | 1 - fs/ext4/inode.c | 1 - fs/fuse/dax.c | 1 - fs/hugetlbfs/inode.c | 1 - fs/libfs.c | 5 ----- fs/xfs/xfs_aops.c | 1 - include/linux/pagemap.h | 1 - mm/page-writeback.c | 18 +++++------------- mm/secretmem.c | 1 - mm/shmem.c | 1 - mm/swap_state.c | 1 - 14 files changed, 5 insertions(+), 38 deletions(-) diff --git a/drivers/dax/device.c b/drivers/dax/device.c index 30665a3ff6ea..018aa9f88ec7 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -345,10 +345,6 @@ static unsigned long dax_get_unmapped_area(struct file *filp, return current->mm->get_unmapped_area(filp, addr, len, pgoff, flags); } -static const struct address_space_operations dev_dax_aops = { - .dirty_folio = noop_dirty_folio, -}; - static int dax_open(struct inode *inode, struct file *filp) { struct dax_device *dax_dev = inode_dax(inode); @@ -358,7 +354,6 @@ static int dax_open(struct inode *inode, struct file *filp) dev_dbg(&dev_dax->dev, "trace\n"); inode->i_mapping = __dax_inode->i_mapping; inode->i_mapping->host = __dax_inode; - inode->i_mapping->a_ops = &dev_dax_aops; filp->f_mapping = inode->i_mapping; filp->f_wb_err = filemap_sample_wb_err(filp->f_mapping); filp->f_sb_err = file_sample_sb_err(filp); diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core/fb_defio.c index 274f5d0fa247..08be3592281f 100644 --- a/drivers/video/fbdev/core/fb_defio.c +++ b/drivers/video/fbdev/core/fb_defio.c @@ -221,10 +221,6 @@ static const struct vm_operations_struct fb_deferred_io_vm_ops = { .page_mkwrite = fb_deferred_io_mkwrite, }; -static const struct address_space_operations fb_deferred_io_aops = { - .dirty_folio = noop_dirty_folio, -}; - int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma) { vma->vm_ops = &fb_deferred_io_vm_ops; @@ -307,7 +303,6 @@ void fb_deferred_io_open(struct fb_info *info, { struct fb_deferred_io *fbdefio = info->fbdefio; - file->f_mapping->a_ops = &fb_deferred_io_aops; fbdefio->open_count++; } EXPORT_SYMBOL_GPL(fb_deferred_io_open); diff --git a/fs/aio.c b/fs/aio.c index 77e33619de40..4cf386f9cb1c 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -484,7 +484,6 @@ static int aio_migrate_folio(struct address_space *mapping, struct folio *dst, #endif static const struct address_space_operations aio_ctx_aops = { - .dirty_folio = noop_dirty_folio, .migrate_folio = aio_migrate_folio, }; diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 75983215c7a1..ce191bdf1c78 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -971,7 +971,6 @@ const struct address_space_operations ext2_aops = { static const struct address_space_operations ext2_dax_aops = { .writepages = ext2_dax_writepages, .direct_IO = noop_direct_IO, - .dirty_folio = noop_dirty_folio, }; /* diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 43775a6ca505..67c1710c01b0 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3561,7 +3561,6 @@ static const struct address_space_operations ext4_da_aops = { static const struct address_space_operations ext4_dax_aops = { .writepages = ext4_dax_writepages, .direct_IO = noop_direct_IO, - .dirty_folio = noop_dirty_folio, .bmap = ext4_bmap, .swap_activate = ext4_iomap_swap_activate, }; diff --git a/fs/fuse/dax.c b/fs/fuse/dax.c index 8e74f278a3f6..50ca767cbd5e 100644 --- a/fs/fuse/dax.c +++ b/fs/fuse/dax.c @@ -1326,7 +1326,6 @@ bool fuse_dax_inode_alloc(struct super_block *sb, struct fuse_inode *fi) static const struct address_space_operations fuse_dax_file_aops = { .writepages = fuse_dax_writepages, .direct_IO = noop_direct_IO, - .dirty_folio = noop_dirty_folio, }; static bool fuse_should_enable_dax(struct inode *inode, unsigned int flags) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 7b17ccfa039d..5404286f0c13 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -1266,7 +1266,6 @@ static void hugetlbfs_destroy_inode(struct inode *inode) static const struct address_space_operations hugetlbfs_aops = { .write_begin = hugetlbfs_write_begin, .write_end = hugetlbfs_write_end, - .dirty_folio = noop_dirty_folio, .migrate_folio = hugetlbfs_migrate_folio, .error_remove_page = hugetlbfs_error_remove_page, }; diff --git a/fs/libfs.c b/fs/libfs.c index 5b851315eeed..982f220a9ee3 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -627,7 +627,6 @@ const struct address_space_operations ram_aops = { .read_folio = simple_read_folio, .write_begin = simple_write_begin, .write_end = simple_write_end, - .dirty_folio = noop_dirty_folio, }; EXPORT_SYMBOL(ram_aops); @@ -1231,16 +1230,12 @@ EXPORT_SYMBOL(kfree_link); struct inode *alloc_anon_inode(struct super_block *s) { - static const struct address_space_operations anon_aops = { - .dirty_folio = noop_dirty_folio, - }; struct inode *inode = new_inode_pseudo(s); if (!inode) return ERR_PTR(-ENOMEM); inode->i_ino = get_next_ino(); - inode->i_mapping->a_ops = &anon_aops; /* * Mark the inode dirty from the very beginning, diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 451942fb38ec..300acea9ee63 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -590,6 +590,5 @@ const struct address_space_operations xfs_address_space_operations = { const struct address_space_operations xfs_dax_aops = { .writepages = xfs_dax_writepages, - .dirty_folio = noop_dirty_folio, .swap_activate = xfs_iomap_swapfile_activate, }; diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 716953ee1ebd..9de3be51dee2 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -1074,7 +1074,6 @@ bool folio_clear_dirty_for_io(struct folio *folio); bool clear_page_dirty_for_io(struct page *page); void folio_invalidate(struct folio *folio, size_t offset, size_t length); int __set_page_dirty_nobuffers(struct page *page); -bool noop_dirty_folio(struct address_space *mapping, struct folio *folio); #ifdef CONFIG_MIGRATION int filemap_migrate_folio(struct address_space *mapping, struct folio *dst, diff --git a/mm/page-writeback.c b/mm/page-writeback.c index d3f42009bb70..d2d739109bfe 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2585,17 +2585,6 @@ int do_writepages(struct address_space *mapping, struct writeback_control *wbc) return ret; } -/* - * For address_spaces which do not use buffers nor write back. - */ -bool noop_dirty_folio(struct address_space *mapping, struct folio *folio) -{ - if (!folio_test_dirty(folio)) - return !folio_test_set_dirty(folio); - return false; -} -EXPORT_SYMBOL(noop_dirty_folio); - /* * Helper function for set_page_dirty family. * @@ -2799,10 +2788,13 @@ bool folio_mark_dirty(struct folio *folio) */ if (folio_test_reclaim(folio)) folio_clear_reclaim(folio); - return mapping->a_ops->dirty_folio(mapping, folio); + if (mapping->a_ops->dirty_folio) + return mapping->a_ops->dirty_folio(mapping, folio); } - return noop_dirty_folio(mapping, folio); + if (!folio_test_dirty(folio)) + return !folio_test_set_dirty(folio); + return false; } EXPORT_SYMBOL(folio_mark_dirty); diff --git a/mm/secretmem.c b/mm/secretmem.c index 86442a15d12f..3fe1c35f9c8d 100644 --- a/mm/secretmem.c +++ b/mm/secretmem.c @@ -157,7 +157,6 @@ static void secretmem_free_folio(struct folio *folio) } const struct address_space_operations secretmem_aops = { - .dirty_folio = noop_dirty_folio, .free_folio = secretmem_free_folio, .migrate_folio = secretmem_migrate_folio, }; diff --git a/mm/shmem.c b/mm/shmem.c index d963c747dabc..9bdef68a088a 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -4090,7 +4090,6 @@ static int shmem_error_remove_page(struct address_space *mapping, const struct address_space_operations shmem_aops = { .writepage = shmem_writepage, - .dirty_folio = noop_dirty_folio, #ifdef CONFIG_TMPFS .write_begin = shmem_write_begin, .write_end = shmem_write_end, diff --git a/mm/swap_state.c b/mm/swap_state.c index f8ea7015bad4..3666439487db 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -30,7 +30,6 @@ */ static const struct address_space_operations swap_aops = { .writepage = swap_writepage, - .dirty_folio = noop_dirty_folio, #ifdef CONFIG_MIGRATION .migrate_folio = migrate_folio, #endif