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| author | Matthew Wilcox <willy@infradead.org> | 2019-01-14 13:57:31 -0500 |
|---|---|---|
| committer | Matthew Wilcox <willy@infradead.org> | 2019-01-14 14:50:34 -0500 |
| commit | d69d287a9002b70bdbe2975660b97241ccefc071 (patch) | |
| tree | 9e0b20a7414f615de4cfade013a4e8b93451bb90 /lib/test_xarray.c | |
| parent | 19ba9ecf24189bd74d070aa1b1c4bcb9fe4ae849 (diff) | |
| download | lwn-d69d287a9002b70bdbe2975660b97241ccefc071.tar.gz lwn-d69d287a9002b70bdbe2975660b97241ccefc071.zip | |
XArray tests: Check mark 2 gets squashed
We do not currently check that the loop in xas_squash_marks() doesn't have
an off-by-one error in it. It didn't, but a patch which introduced an
off-by-one error wasn't caught by any existing test. Switch the roles
of XA_MARK_1 and XA_MARK_2 to catch that bug.
Reported-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'lib/test_xarray.c')
| -rw-r--r-- | lib/test_xarray.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/test_xarray.c b/lib/test_xarray.c index 3cf17338b0a4..c596a957f764 100644 --- a/lib/test_xarray.c +++ b/lib/test_xarray.c @@ -199,7 +199,7 @@ static noinline void check_xa_mark_1(struct xarray *xa, unsigned long index) XA_BUG_ON(xa, xa_store_index(xa, index + 1, GFP_KERNEL)); xa_set_mark(xa, index + 1, XA_MARK_0); XA_BUG_ON(xa, xa_store_index(xa, index + 2, GFP_KERNEL)); - xa_set_mark(xa, index + 2, XA_MARK_1); + xa_set_mark(xa, index + 2, XA_MARK_2); XA_BUG_ON(xa, xa_store_index(xa, next, GFP_KERNEL)); xa_store_order(xa, index, order, xa_mk_index(index), GFP_KERNEL); @@ -209,8 +209,8 @@ static noinline void check_xa_mark_1(struct xarray *xa, unsigned long index) void *entry; XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_0)); - XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_1)); - XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_2)); + XA_BUG_ON(xa, xa_get_mark(xa, i, XA_MARK_1)); + XA_BUG_ON(xa, !xa_get_mark(xa, i, XA_MARK_2)); /* We should see two elements in the array */ rcu_read_lock(); |