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XArray: Fix xa_find_after with multi-index entries
authorMatthew Wilcox (Oracle) <willy@infradead.org>
Sat, 18 Jan 2020 03:00:41 +0000 (22:00 -0500)
committerMatthew Wilcox (Oracle) <willy@infradead.org>
Sat, 18 Jan 2020 03:33:27 +0000 (22:33 -0500)
commit19c30f4dd0923ef191f35c652ee4058e91e89056
tree6080ded903efebfd2c32c21b3dccb2ab96075f4atree | snapshot
parent430f24f94c8a174d411a550d7b5529301922e67acommit | diff
XArray: Fix xa_find_after with multi-index entries

If the entry is of an order which is a multiple of XA_CHUNK_SIZE,
the current detection of sibling entries does not work.  Factor out
an xas_sibling() function to make xa_find_after() a little more
understandable, and write a new implementation that doesn't suffer from
the same bug.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: stable@vger.kernel.org
lib/test_xarray.c diff | blob | history
lib/xarray.c diff | blob | history
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