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| author |   Matthew Wilcox <willy@infradead.org> | 2018-03-28 15:40:41 -0400 |
|---|---|---|
| committer | Matthew Wilcox <willy@infradead.org> | 2018-10-21 10:46:43 -0400 |
| commit | 07f2d89cc270936ac314e7cc4ac57077d7f08aef (patch) | |
| tree | d87ef7401085bddd3bd76248738faf7f9da16843 /fs/dax.c | |
| parent | dax: Convert dax_layout_busy_page to XArray (diff) | |
| download | linux-dev-07f2d89cc270936ac314e7cc4ac57077d7f08aef.tar.xz linux-dev-07f2d89cc270936ac314e7cc4ac57077d7f08aef.zip | |
dax: Convert __dax_invalidate_entry to XArray
Avoids walking the radix tree multiple times looking for tags.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 17 |
1 files changed, 9 insertions, 8 deletions
@@ -777,27 +777,28 @@ EXPORT_SYMBOL_GPL(dax_layout_busy_page); static int __dax_invalidate_entry(struct address_space *mapping, pgoff_t index, bool trunc) { + XA_STATE(xas, &mapping->i_pages, index); int ret = 0; void *entry; - struct radix_tree_root *pages = &mapping->i_pages; - xa_lock_irq(pages); - entry = get_unlocked_mapping_entry(mapping, index, NULL); + xas_lock_irq(&xas); + entry = get_unlocked_entry(&xas); if (!entry || WARN_ON_ONCE(!xa_is_value(entry))) goto out; if (!trunc && - (radix_tree_tag_get(pages, index, PAGECACHE_TAG_DIRTY) || - radix_tree_tag_get(pages, index, PAGECACHE_TAG_TOWRITE))) + (xas_get_mark(&xas, PAGECACHE_TAG_DIRTY) || + xas_get_mark(&xas, PAGECACHE_TAG_TOWRITE))) goto out; dax_disassociate_entry(entry, mapping, trunc); - radix_tree_delete(pages, index); + xas_store(&xas, NULL); mapping->nrexceptional--; ret = 1; out: - put_unlocked_mapping_entry(mapping, index, entry); - xa_unlock_irq(pages); + put_unlocked_entry(&xas, entry); + xas_unlock_irq(&xas); return ret; } + /* * Delete DAX entry at @index from @mapping. Wait for it * to be unlocked before deleting it. |