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authorMatthew Wilcox <willy@infradead.org>2017-11-03 13:30:42 -0400
committerMatthew Wilcox <willy@infradead.org>2018-09-29 22:47:49 -0400
commit3159f943aafdbacb2f94c38fdaadabf2bbde2a14 (patch)
tree7e06823a1ab7e90774535d17a217a939bdddda3b /Makefile
parent66ee620f06f99d72475db6eb638559ba608c7dee (diff)
xarray: Replace exceptional entries
Introduce xarray value entries and tagged pointers to replace radix tree exceptional entries. This is a slight change in encoding to allow the use of an extra bit (we can now store BITS_PER_LONG - 1 bits in a value entry). It is also a change in emphasis; exceptional entries are intimidating and different. As the comment explains, you can choose to store values or pointers in the xarray and they are both first-class citizens. Signed-off-by: Matthew Wilcox <willy@infradead.org> Reviewed-by: Josef Bacik <jbacik@fb.com>
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