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authorJohannes Weiner <hannes@cmpxchg.org>2016-12-12 16:43:49 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-12 18:55:08 -0800
commit4d693d08607ab319095ec8942909df4b4aebdf66 (patch)
tree02b3c0da72cc8f39c1e16387658d76e8351affb6 /fs
parentf4b109c6dad54257eca837f9dd16a23f2eeab832 (diff)
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')
-rw-r--r--fs/dax.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/dax.c b/fs/dax.c
index 85930c2a2749..6916ed37d463 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -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);