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authorJohannes Weiner <hannes@cmpxchg.org>2016-12-13 03:43:49 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-13 05:55:08 +0300
commit4d693d08607ab319095ec8942909df4b4aebdf66 (patch)
tree02b3c0da72cc8f39c1e16387658d76e8351affb6 /mm
parentf4b109c6dad54257eca837f9dd16a23f2eeab832 (diff)
downloadlinux-4d693d08607ab319095ec8942909df4b4aebdf66.tar.xz
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 'mm')
-rw-r--r--mm/shmem.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 3149ddee8f55..abd7403aba41 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -311,7 +311,8 @@ static int shmem_radix_tree_replace(struct address_space *mapping,
return -ENOENT;
if (item != expected)
return -ENOENT;
- __radix_tree_replace(&mapping->page_tree, node, pslot, replacement);
+ __radix_tree_replace(&mapping->page_tree, node, pslot,
+ replacement, NULL, NULL);
return 0;
}