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authorMatthew Wilcox <willy@infradead.org>2017-11-03 20:30:42 +0300
committerMatthew Wilcox <willy@infradead.org>2018-09-30 05:47:49 +0300
commit3159f943aafdbacb2f94c38fdaadabf2bbde2a14 (patch)
tree7e06823a1ab7e90774535d17a217a939bdddda3b /mm/swap.c
parent66ee620f06f99d72475db6eb638559ba608c7dee (diff)
downloadlinux-3159f943aafdbacb2f94c38fdaadabf2bbde2a14.tar.xz
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>
Diffstat (limited to 'mm/swap.c')
-rw-r--r--mm/swap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/swap.c b/mm/swap.c
index 26fc9b5f1b6c..4c5c7fcc6e46 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -965,7 +965,7 @@ void pagevec_remove_exceptionals(struct pagevec *pvec)
for (i = 0, j = 0; i < pagevec_count(pvec); i++) {
struct page *page = pvec->pages[i];
- if (!radix_tree_exceptional_entry(page))
+ if (!xa_is_value(page))
pvec->pages[j++] = page;
}
pvec->nr = j;