Commit 29e0967c authored by Matthew Wilcox's avatar Matthew Wilcox Committed by Linus Torvalds

radix-tree: fix deleting a multi-order entry through an alias

If we deleted an entry through an index which looked up a sibling
pointer, we'd end up zeroing out the wrong slots in the node.  Use
get_slot_offset() to find the right slot.
Signed-off-by: default avatarMatthew Wilcox <willy@linux.intel.com>
Reviewed-by: default avatarRoss Zwisler <ross.zwisler@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jan Kara <jack@suse.com>
Cc: Neil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 3b8c00f6
...@@ -1558,7 +1558,7 @@ void *radix_tree_delete_item(struct radix_tree_root *root, ...@@ -1558,7 +1558,7 @@ void *radix_tree_delete_item(struct radix_tree_root *root,
return entry; return entry;
} }
offset = index & RADIX_TREE_MAP_MASK; offset = get_slot_offset(node, slot);
/* /*
* Clear all tags associated with the item to be deleted. * Clear all tags associated with the item to be deleted.
......
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