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linux/lib
Matthew Wilcox (Oracle) 91abab8383 XArray: Fix xas_next() with a single entry at 0
If there is only a single entry at 0, the first time we call xas_next(),
we return the entry.  Unfortunately, all subsequent times we call
xas_next(), we also return the entry at 0 instead of noticing that the
xa_index is now greater than zero.  This broke find_get_pages_contig().

Fixes: 64d3e9a9e0 ("xarray: Step through an XArray")
Reported-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
2019-07-01 17:11:16 -04:00
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