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| author | Johannes Weiner <hannes@cmpxchg.org> | 2016-12-12 16:43:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-12-12 18:55:08 -0800 |
| commit | 4d693d08607ab319095ec8942909df4b4aebdf66 (patch) | |
| tree | 02b3c0da72cc8f39c1e16387658d76e8351affb6 /fs/dax.c | |
| parent | f4b109c6dad54257eca837f9dd16a23f2eeab832 (diff) | |
| download | lwn-4d693d08607ab319095ec8942909df4b4aebdf66.tar.gz lwn-4d693d08607ab319095ec8942909df4b4aebdf66.zip | |
lib: radix-tree: update callback for changing leaf nodes
Support handing __radix_tree_replace() a callback that gets invoked for
all leaf nodes that change or get freed as a result of the slot
replacement, to assist users tracking nodes with node->private_list.
This prepares for putting page cache shadow entries into the radix tree
root again and drastically simplifying the shadow tracking.
Link: http://lkml.kernel.org/r/20161117193134.GD23430@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Suggested-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Matthew Wilcox <mawilcox@linuxonhyperv.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 3 |
1 files changed, 2 insertions, 1 deletions
@@ -649,7 +649,8 @@ static void *dax_insert_mapping_entry(struct address_space *mapping, ret = __radix_tree_lookup(page_tree, index, &node, &slot); WARN_ON_ONCE(ret != entry); - __radix_tree_replace(page_tree, node, slot, new_entry); + __radix_tree_replace(page_tree, node, slot, + new_entry, NULL, NULL); } if (vmf->flags & FAULT_FLAG_WRITE) radix_tree_tag_set(page_tree, index, PAGECACHE_TAG_DIRTY); |