From 78525c74d9e7d1a6ce69bd4388f045f6e474a20b Mon Sep 17 00:00:00 2001 From: David Howells Date: Wed, 11 Aug 2021 09:49:13 +0100 Subject: netfs, 9p, afs, ceph: Use folios Convert the netfs helper library to use folios throughout, convert the 9p and afs filesystems to use folios in their file I/O paths and convert the ceph filesystem to use just enough folios to compile. With these changes, afs passes -g quick xfstests. Changes ======= ver #5: - Got rid of folio_end{io,_read,_write}() and inlined the stuff it does instead (Willy decided he didn't want this after all). ver #4: - Fixed a bug in afs_redirty_page() whereby it didn't set the next page index in the loop and returned too early. - Simplified a check in v9fs_vfs_write_folio_locked()[1]. - Undid a change to afs_symlink_readpage()[1]. - Used offset_in_folio() in afs_write_end()[1]. - Changed from using page_endio() to folio_end{io,_read,_write}()[1]. ver #2: - Add 9p foliation. Signed-off-by: David Howells Reviewed-by: Jeff Layton Tested-by: Jeff Layton Tested-by: Dominique Martinet Tested-by: kafs-testing@auristor.com cc: Matthew Wilcox (Oracle) cc: Marc Dionne cc: Ilya Dryomov cc: Dominique Martinet cc: v9fs-developer@lists.sourceforge.net cc: linux-afs@lists.infradead.org cc: ceph-devel@vger.kernel.org cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/YYKa3bfQZxK5/wDN@casper.infradead.org/ [1] Link: https://lore.kernel.org/r/2408234.1628687271@warthog.procyon.org.uk/ # rfc Link: https://lore.kernel.org/r/162877311459.3085614.10601478228012245108.stgit@warthog.procyon.org.uk/ Link: https://lore.kernel.org/r/162981153551.1901565.3124454657133703341.stgit@warthog.procyon.org.uk/ Link: https://lore.kernel.org/r/163005745264.2472992.9852048135392188995.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/163584187452.4023316.500389675405550116.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/163649328026.309189.1124218109373941936.stgit@warthog.procyon.org.uk/ # v4 Link: https://lore.kernel.org/r/163657852454.834781.9265101983152100556.stgit@warthog.procyon.org.uk/ # v5 --- fs/afs/write.c | 347 +++++++++++++++++++++++++++------------------------------ 1 file changed, 167 insertions(+), 180 deletions(-) (limited to 'fs/afs/write.c') diff --git a/fs/afs/write.c b/fs/afs/write.c index 8b1d9c2f6bec..ca4909baf5e6 100644 --- a/fs/afs/write.c +++ b/fs/afs/write.c @@ -32,7 +32,7 @@ int afs_write_begin(struct file *file, struct address_space *mapping, struct page **_page, void **fsdata) { struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); - struct page *page; + struct folio *folio; unsigned long priv; unsigned f, from; unsigned t, to; @@ -46,12 +46,12 @@ int afs_write_begin(struct file *file, struct address_space *mapping, * file. We need to do this before we get a lock on the page in case * there's more than one writer competing for the same cache block. */ - ret = netfs_write_begin(file, mapping, pos, len, flags, &page, fsdata, + ret = netfs_write_begin(file, mapping, pos, len, flags, &folio, fsdata, &afs_req_ops, NULL); if (ret < 0) return ret; - index = page->index; + index = folio_index(folio); from = pos - index * PAGE_SIZE; to = from + len; @@ -59,14 +59,14 @@ try_again: /* See if this page is already partially written in a way that we can * merge the new write with. */ - if (PagePrivate(page)) { - priv = page_private(page); - f = afs_page_dirty_from(page, priv); - t = afs_page_dirty_to(page, priv); + if (folio_test_private(folio)) { + priv = (unsigned long)folio_get_private(folio); + f = afs_folio_dirty_from(folio, priv); + t = afs_folio_dirty_to(folio, priv); ASSERTCMP(f, <=, t); - if (PageWriteback(page)) { - trace_afs_page_dirty(vnode, tracepoint_string("alrdy"), page); + if (folio_test_writeback(folio)) { + trace_afs_folio_dirty(vnode, tracepoint_string("alrdy"), folio); goto flush_conflicting_write; } /* If the file is being filled locally, allow inter-write @@ -78,7 +78,7 @@ try_again: goto flush_conflicting_write; } - *_page = page; + *_page = &folio->page; _leave(" = 0"); return 0; @@ -87,17 +87,17 @@ try_again: */ flush_conflicting_write: _debug("flush conflict"); - ret = write_one_page(page); + ret = folio_write_one(folio); if (ret < 0) goto error; - ret = lock_page_killable(page); + ret = folio_lock_killable(folio); if (ret < 0) goto error; goto try_again; error: - put_page(page); + folio_put(folio); _leave(" = %d", ret); return ret; } @@ -107,24 +107,25 @@ error: */ int afs_write_end(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, - struct page *page, void *fsdata) + struct page *subpage, void *fsdata) { + struct folio *folio = page_folio(subpage); struct afs_vnode *vnode = AFS_FS_I(file_inode(file)); unsigned long priv; - unsigned int f, from = pos & (thp_size(page) - 1); + unsigned int f, from = offset_in_folio(folio, pos); unsigned int t, to = from + copied; loff_t i_size, maybe_i_size; _enter("{%llx:%llu},{%lx}", - vnode->fid.vid, vnode->fid.vnode, page->index); + vnode->fid.vid, vnode->fid.vnode, folio_index(folio)); - if (!PageUptodate(page)) { + if (!folio_test_uptodate(folio)) { if (copied < len) { copied = 0; goto out; } - SetPageUptodate(page); + folio_mark_uptodate(folio); } if (copied == 0) @@ -141,29 +142,29 @@ int afs_write_end(struct file *file, struct address_space *mapping, write_sequnlock(&vnode->cb_lock); } - if (PagePrivate(page)) { - priv = page_private(page); - f = afs_page_dirty_from(page, priv); - t = afs_page_dirty_to(page, priv); + if (folio_test_private(folio)) { + priv = (unsigned long)folio_get_private(folio); + f = afs_folio_dirty_from(folio, priv); + t = afs_folio_dirty_to(folio, priv); if (from < f) f = from; if (to > t) t = to; - priv = afs_page_dirty(page, f, t); - set_page_private(page, priv); - trace_afs_page_dirty(vnode, tracepoint_string("dirty+"), page); + priv = afs_folio_dirty(folio, f, t); + folio_change_private(folio, (void *)priv); + trace_afs_folio_dirty(vnode, tracepoint_string("dirty+"), folio); } else { - priv = afs_page_dirty(page, from, to); - attach_page_private(page, (void *)priv); - trace_afs_page_dirty(vnode, tracepoint_string("dirty"), page); + priv = afs_folio_dirty(folio, from, to); + folio_attach_private(folio, (void *)priv); + trace_afs_folio_dirty(vnode, tracepoint_string("dirty"), folio); } - if (set_page_dirty(page)) - _debug("dirtied %lx", page->index); + if (folio_mark_dirty(folio)) + _debug("dirtied %lx", folio_index(folio)); out: - unlock_page(page); - put_page(page); + folio_unlock(folio); + folio_put(folio); return copied; } @@ -174,40 +175,32 @@ static void afs_kill_pages(struct address_space *mapping, loff_t start, loff_t len) { struct afs_vnode *vnode = AFS_FS_I(mapping->host); - struct pagevec pv; - unsigned int loop, psize; + struct folio *folio; + pgoff_t index = start / PAGE_SIZE; + pgoff_t last = (start + len - 1) / PAGE_SIZE, next; _enter("{%llx:%llu},%llx @%llx", vnode->fid.vid, vnode->fid.vnode, len, start); - pagevec_init(&pv); - do { - _debug("kill %llx @%llx", len, start); - - pv.nr = find_get_pages_contig(mapping, start / PAGE_SIZE, - PAGEVEC_SIZE, pv.pages); - if (pv.nr == 0) - break; + _debug("kill %lx (to %lx)", index, last); - for (loop = 0; loop < pv.nr; loop++) { - struct page *page = pv.pages[loop]; + folio = filemap_get_folio(mapping, index); + if (!folio) { + next = index + 1; + continue; + } - if (page->index * PAGE_SIZE >= start + len) - break; + next = folio_next_index(folio); - psize = thp_size(page); - start += psize; - len -= psize; - ClearPageUptodate(page); - end_page_writeback(page); - lock_page(page); - generic_error_remove_page(mapping, page); - unlock_page(page); - } + folio_clear_uptodate(folio); + folio_end_writeback(folio); + folio_lock(folio); + generic_error_remove_page(mapping, &folio->page); + folio_unlock(folio); + folio_put(folio); - __pagevec_release(&pv); - } while (len > 0); + } while (index = next, index <= last); _leave(""); } @@ -220,37 +213,27 @@ static void afs_redirty_pages(struct writeback_control *wbc, loff_t start, loff_t len) { struct afs_vnode *vnode = AFS_FS_I(mapping->host); - struct pagevec pv; - unsigned int loop, psize; + struct folio *folio; + pgoff_t index = start / PAGE_SIZE; + pgoff_t last = (start + len - 1) / PAGE_SIZE, next; _enter("{%llx:%llu},%llx @%llx", vnode->fid.vid, vnode->fid.vnode, len, start); - pagevec_init(&pv); - do { _debug("redirty %llx @%llx", len, start); - pv.nr = find_get_pages_contig(mapping, start / PAGE_SIZE, - PAGEVEC_SIZE, pv.pages); - if (pv.nr == 0) - break; - - for (loop = 0; loop < pv.nr; loop++) { - struct page *page = pv.pages[loop]; - - if (page->index * PAGE_SIZE >= start + len) - break; - - psize = thp_size(page); - start += psize; - len -= psize; - redirty_page_for_writepage(wbc, page); - end_page_writeback(page); + folio = filemap_get_folio(mapping, index); + if (!folio) { + next = index + 1; + continue; } - __pagevec_release(&pv); - } while (len > 0); + next = index + folio_nr_pages(folio); + folio_redirty_for_writepage(wbc, folio); + folio_end_writeback(folio); + folio_put(folio); + } while (index = next, index <= last); _leave(""); } @@ -261,7 +244,7 @@ static void afs_redirty_pages(struct writeback_control *wbc, static void afs_pages_written_back(struct afs_vnode *vnode, loff_t start, unsigned int len) { struct address_space *mapping = vnode->vfs_inode.i_mapping; - struct page *page; + struct folio *folio; pgoff_t end; XA_STATE(xas, &mapping->i_pages, start / PAGE_SIZE); @@ -272,15 +255,16 @@ static void afs_pages_written_back(struct afs_vnode *vnode, loff_t start, unsign rcu_read_lock(); end = (start + len - 1) / PAGE_SIZE; - xas_for_each(&xas, page, end) { - if (!PageWriteback(page)) { - kdebug("bad %x @%llx page %lx %lx", len, start, page->index, end); - ASSERT(PageWriteback(page)); + xas_for_each(&xas, folio, end) { + if (!folio_test_writeback(folio)) { + kdebug("bad %x @%llx page %lx %lx", + len, start, folio_index(folio), end); + ASSERT(folio_test_writeback(folio)); } - trace_afs_page_dirty(vnode, tracepoint_string("clear"), page); - detach_page_private(page); - page_endio(page, true, 0); + trace_afs_folio_dirty(vnode, tracepoint_string("clear"), folio); + folio_detach_private(folio); + folio_end_writeback(folio); } rcu_read_unlock(); @@ -437,7 +421,7 @@ static void afs_extend_writeback(struct address_space *mapping, unsigned int *_len) { struct pagevec pvec; - struct page *page; + struct folio *folio; unsigned long priv; unsigned int psize, filler = 0; unsigned int f, t; @@ -456,43 +440,43 @@ static void afs_extend_writeback(struct address_space *mapping, */ rcu_read_lock(); - xas_for_each(&xas, page, ULONG_MAX) { + xas_for_each(&xas, folio, ULONG_MAX) { stop = true; - if (xas_retry(&xas, page)) + if (xas_retry(&xas, folio)) continue; - if (xa_is_value(page)) + if (xa_is_value(folio)) break; - if (page->index != index) + if (folio_index(folio) != index) break; - if (!page_cache_get_speculative(page)) { + if (!folio_try_get_rcu(folio)) { xas_reset(&xas); continue; } /* Has the page moved or been split? */ - if (unlikely(page != xas_reload(&xas))) { - put_page(page); + if (unlikely(folio != xas_reload(&xas))) { + folio_put(folio); break; } - if (!trylock_page(page)) { - put_page(page); + if (!folio_trylock(folio)) { + folio_put(folio); break; } - if (!PageDirty(page) || PageWriteback(page)) { - unlock_page(page); - put_page(page); + if (!folio_test_dirty(folio) || folio_test_writeback(folio)) { + folio_unlock(folio); + folio_put(folio); break; } - psize = thp_size(page); - priv = page_private(page); - f = afs_page_dirty_from(page, priv); - t = afs_page_dirty_to(page, priv); + psize = folio_size(folio); + priv = (unsigned long)folio_get_private(folio); + f = afs_folio_dirty_from(folio, priv); + t = afs_folio_dirty_to(folio, priv); if (f != 0 && !new_content) { - unlock_page(page); - put_page(page); + folio_unlock(folio); + folio_put(folio); break; } @@ -503,8 +487,8 @@ static void afs_extend_writeback(struct address_space *mapping, else if (t == psize || new_content) stop = false; - index += thp_nr_pages(page); - if (!pagevec_add(&pvec, page)) + index += folio_nr_pages(folio); + if (!pagevec_add(&pvec, &folio->page)) break; if (stop) break; @@ -521,16 +505,16 @@ static void afs_extend_writeback(struct address_space *mapping, break; for (i = 0; i < pagevec_count(&pvec); i++) { - page = pvec.pages[i]; - trace_afs_page_dirty(vnode, tracepoint_string("store+"), page); + folio = page_folio(pvec.pages[i]); + trace_afs_folio_dirty(vnode, tracepoint_string("store+"), folio); - if (!clear_page_dirty_for_io(page)) + if (!folio_clear_dirty_for_io(folio)) BUG(); - if (test_set_page_writeback(page)) + if (folio_start_writeback(folio)) BUG(); - *_count -= thp_nr_pages(page); - unlock_page(page); + *_count -= folio_nr_pages(folio); + folio_unlock(folio); } pagevec_release(&pvec); @@ -544,10 +528,10 @@ static void afs_extend_writeback(struct address_space *mapping, * Synchronously write back the locked page and any subsequent non-locked dirty * pages. */ -static ssize_t afs_write_back_from_locked_page(struct address_space *mapping, - struct writeback_control *wbc, - struct page *page, - loff_t start, loff_t end) +static ssize_t afs_write_back_from_locked_folio(struct address_space *mapping, + struct writeback_control *wbc, + struct folio *folio, + loff_t start, loff_t end) { struct afs_vnode *vnode = AFS_FS_I(mapping->host); struct iov_iter iter; @@ -558,22 +542,22 @@ static ssize_t afs_write_back_from_locked_page(struct address_space *mapping, long count = wbc->nr_to_write; int ret; - _enter(",%lx,%llx-%llx", page->index, start, end); + _enter(",%lx,%llx-%llx", folio_index(folio), start, end); - if (test_set_page_writeback(page)) + if (folio_start_writeback(folio)) BUG(); - count -= thp_nr_pages(page); + count -= folio_nr_pages(folio); /* Find all consecutive lockable dirty pages that have contiguous * written regions, stopping when we find a page that is not * immediately lockable, is not dirty or is missing, or we reach the * end of the range. */ - priv = page_private(page); - offset = afs_page_dirty_from(page, priv); - to = afs_page_dirty_to(page, priv); - trace_afs_page_dirty(vnode, tracepoint_string("store"), page); + priv = (unsigned long)folio_get_private(folio); + offset = afs_folio_dirty_from(folio, priv); + to = afs_folio_dirty_to(folio, priv); + trace_afs_folio_dirty(vnode, tracepoint_string("store"), folio); len = to - offset; start += offset; @@ -586,7 +570,7 @@ static ssize_t afs_write_back_from_locked_page(struct address_space *mapping, max_len = min_t(unsigned long long, max_len, i_size - start); if (len < max_len && - (to == thp_size(page) || new_content)) + (to == folio_size(folio) || new_content)) afs_extend_writeback(mapping, vnode, &count, start, max_len, new_content, &len); len = min_t(loff_t, len, max_len); @@ -596,7 +580,7 @@ static ssize_t afs_write_back_from_locked_page(struct address_space *mapping, * set; the first page is still locked at this point, but all the rest * have been unlocked. */ - unlock_page(page); + folio_unlock(folio); if (start < i_size) { _debug("write back %x @%llx [%llx]", len, start, i_size); @@ -657,16 +641,17 @@ static ssize_t afs_write_back_from_locked_page(struct address_space *mapping, * write a page back to the server * - the caller locked the page for us */ -int afs_writepage(struct page *page, struct writeback_control *wbc) +int afs_writepage(struct page *subpage, struct writeback_control *wbc) { + struct folio *folio = page_folio(subpage); ssize_t ret; loff_t start; - _enter("{%lx},", page->index); + _enter("{%lx},", folio_index(folio)); - start = page->index * PAGE_SIZE; - ret = afs_write_back_from_locked_page(page->mapping, wbc, page, - start, LLONG_MAX - start); + start = folio_index(folio) * PAGE_SIZE; + ret = afs_write_back_from_locked_folio(folio_mapping(folio), wbc, + folio, start, LLONG_MAX - start); if (ret < 0) { _leave(" = %zd", ret); return ret; @@ -683,7 +668,8 @@ static int afs_writepages_region(struct address_space *mapping, struct writeback_control *wbc, loff_t start, loff_t end, loff_t *_next) { - struct page *page; + struct folio *folio; + struct page *head_page; ssize_t ret; int n; @@ -693,13 +679,14 @@ static int afs_writepages_region(struct address_space *mapping, pgoff_t index = start / PAGE_SIZE; n = find_get_pages_range_tag(mapping, &index, end / PAGE_SIZE, - PAGECACHE_TAG_DIRTY, 1, &page); + PAGECACHE_TAG_DIRTY, 1, &head_page); if (!n) break; - start = (loff_t)page->index * PAGE_SIZE; /* May regress with THPs */ + folio = page_folio(head_page); + start = folio_pos(folio); /* May regress with THPs */ - _debug("wback %lx", page->index); + _debug("wback %lx", folio_index(folio)); /* At this point we hold neither the i_pages lock nor the * page lock: the page may be truncated or invalidated @@ -707,37 +694,38 @@ static int afs_writepages_region(struct address_space *mapping, * back from swapper_space to tmpfs file mapping */ if (wbc->sync_mode != WB_SYNC_NONE) { - ret = lock_page_killable(page); + ret = folio_lock_killable(folio); if (ret < 0) { - put_page(page); + folio_put(folio); return ret; } } else { - if (!trylock_page(page)) { - put_page(page); + if (!folio_trylock(folio)) { + folio_put(folio); return 0; } } - if (page->mapping != mapping || !PageDirty(page)) { - start += thp_size(page); - unlock_page(page); - put_page(page); + if (folio_mapping(folio) != mapping || + !folio_test_dirty(folio)) { + start += folio_size(folio); + folio_unlock(folio); + folio_put(folio); continue; } - if (PageWriteback(page)) { - unlock_page(page); + if (folio_test_writeback(folio)) { + folio_unlock(folio); if (wbc->sync_mode != WB_SYNC_NONE) - wait_on_page_writeback(page); - put_page(page); + folio_wait_writeback(folio); + folio_put(folio); continue; } - if (!clear_page_dirty_for_io(page)) + if (!folio_clear_dirty_for_io(folio)) BUG(); - ret = afs_write_back_from_locked_page(mapping, wbc, page, start, end); - put_page(page); + ret = afs_write_back_from_locked_folio(mapping, wbc, folio, start, end); + folio_put(folio); if (ret < 0) { _leave(" = %zd", ret); return ret; @@ -862,7 +850,6 @@ int afs_fsync(struct file *file, loff_t start, loff_t end, int datasync) vm_fault_t afs_page_mkwrite(struct vm_fault *vmf) { struct folio *folio = page_folio(vmf->page); - struct page *page = &folio->page; struct file *file = vmf->vma->vm_file; struct inode *inode = file_inode(file); struct afs_vnode *vnode = AFS_FS_I(inode); @@ -870,7 +857,7 @@ vm_fault_t afs_page_mkwrite(struct vm_fault *vmf) unsigned long priv; vm_fault_t ret = VM_FAULT_RETRY; - _enter("{{%llx:%llu}},{%lx}", vnode->fid.vid, vnode->fid.vnode, page->index); + _enter("{{%llx:%llu}},{%lx}", vnode->fid.vid, vnode->fid.vnode, folio_index(folio)); afs_validate(vnode, af->key); @@ -880,18 +867,18 @@ vm_fault_t afs_page_mkwrite(struct vm_fault *vmf) * be modified. We then assume the entire page will need writing back. */ #ifdef CONFIG_AFS_FSCACHE - if (PageFsCache(page) && - wait_on_page_fscache_killable(page) < 0) + if (folio_test_fscache(folio) && + folio_wait_fscache_killable(folio) < 0) goto out; #endif if (folio_wait_writeback_killable(folio)) goto out; - if (lock_page_killable(page) < 0) + if (folio_lock_killable(folio) < 0) goto out; - /* We mustn't change page->private until writeback is complete as that + /* We mustn't change folio->private until writeback is complete as that * details the portion of the page we need to write back and we might * need to redirty the page if there's a problem. */ @@ -900,14 +887,14 @@ vm_fault_t afs_page_mkwrite(struct vm_fault *vmf) goto out; } - priv = afs_page_dirty(page, 0, thp_size(page)); - priv = afs_page_dirty_mmapped(priv); - if (PagePrivate(page)) { - set_page_private(page, priv); - trace_afs_page_dirty(vnode, tracepoint_string("mkwrite+"), page); + priv = afs_folio_dirty(folio, 0, folio_size(folio)); + priv = afs_folio_dirty_mmapped(priv); + if (folio_test_private(folio)) { + folio_change_private(folio, (void *)priv); + trace_afs_folio_dirty(vnode, tracepoint_string("mkwrite+"), folio); } else { - attach_page_private(page, (void *)priv); - trace_afs_page_dirty(vnode, tracepoint_string("mkwrite"), page); + folio_attach_private(folio, (void *)priv); + trace_afs_folio_dirty(vnode, tracepoint_string("mkwrite"), folio); } file_update_time(file); @@ -948,38 +935,38 @@ void afs_prune_wb_keys(struct afs_vnode *vnode) /* * Clean up a page during invalidation. */ -int afs_launder_page(struct page *page) +int afs_launder_page(struct page *subpage) { - struct address_space *mapping = page->mapping; - struct afs_vnode *vnode = AFS_FS_I(mapping->host); + struct folio *folio = page_folio(subpage); + struct afs_vnode *vnode = AFS_FS_I(folio_inode(folio)); struct iov_iter iter; struct bio_vec bv[1]; unsigned long priv; unsigned int f, t; int ret = 0; - _enter("{%lx}", page->index); + _enter("{%lx}", folio_index(folio)); - priv = page_private(page); - if (clear_page_dirty_for_io(page)) { + priv = (unsigned long)folio_get_private(folio); + if (folio_clear_dirty_for_io(folio)) { f = 0; - t = thp_size(page); - if (PagePrivate(page)) { - f = afs_page_dirty_from(page, priv); - t = afs_page_dirty_to(page, priv); + t = folio_size(folio); + if (folio_test_private(folio)) { + f = afs_folio_dirty_from(folio, priv); + t = afs_folio_dirty_to(folio, priv); } - bv[0].bv_page = page; + bv[0].bv_page = &folio->page; bv[0].bv_offset = f; bv[0].bv_len = t - f; iov_iter_bvec(&iter, WRITE, bv, 1, bv[0].bv_len); - trace_afs_page_dirty(vnode, tracepoint_string("launder"), page); - ret = afs_store_data(vnode, &iter, page_offset(page) + f, true); + trace_afs_folio_dirty(vnode, tracepoint_string("launder"), folio); + ret = afs_store_data(vnode, &iter, folio_pos(folio) + f, true); } - trace_afs_page_dirty(vnode, tracepoint_string("laundered"), page); - detach_page_private(page); - wait_on_page_fscache(page); + trace_afs_folio_dirty(vnode, tracepoint_string("laundered"), folio); + folio_detach_private(folio); + folio_wait_fscache(folio); return ret; } -- cgit v1.2.3