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radix-tree: remove restriction on multi-order entries 

Now that sibling pointers are handled explicitly, there is no purpose
served by restricting the order to be >= RADIX_TREE_MAP_SHIFT.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Reviewed-by: Ross 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox 2016-05-20 17:02:05 -07:00 committed by Linus Torvalds
parent 29e0967c2f
commit aa54757602
1 changed files with 0 additions and 2 deletions
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lib/radix-tree.c
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@ -483,8 +483,6 @@ int __radix_tree_create(struct radix_tree_root *root, unsigned long index,
unsigned int height, shift, offset; unsigned int height, shift, offset;
int error; int error;
BUG_ON((0 < order) && (order < RADIX_TREE_MAP_SHIFT));
/* Make sure the tree is high enough. */ /* Make sure the tree is high enough. */
if (index > radix_tree_maxindex(root->height)) { if (index > radix_tree_maxindex(root->height)) {
error = radix_tree_extend(root, index, order); error = radix_tree_extend(root, index, order);