diff options
| author | Matthew Wilcox <willy@infradead.org> | 2018-08-28 16:13:16 -0400 |
|---|---|---|
| committer | Matthew Wilcox <willy@infradead.org> | 2018-10-21 10:46:46 -0400 |
| commit | d6427f8179b5dd65eb468c61fc8cc24657c336c9 (patch) | |
| tree | be783289bf2c41109ad5386fc62cc7973a0e770e /lib | |
| parent | 47e0fab2b15155e33fdff777c791bebfd5855bbc (diff) | |
| download | linux-stable-d6427f8179b5dd65eb468c61fc8cc24657c336c9.tar.gz linux-stable-d6427f8179b5dd65eb468c61fc8cc24657c336c9.tar.bz2 linux-stable-d6427f8179b5dd65eb468c61fc8cc24657c336c9.zip | |
xarray: Move multiorder account test in-kernel
Move this test to the in-kernel test suite, and enhance it to test
several different orders.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/test_xarray.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/lib/test_xarray.c b/lib/test_xarray.c index ca86141641cb..38cab4ccb24e 100644 --- a/lib/test_xarray.c +++ b/lib/test_xarray.c @@ -1019,6 +1019,37 @@ static noinline void check_workingset(struct xarray *xa, unsigned long index) XA_BUG_ON(xa, !xa_empty(xa)); } +/* + * Check that the pointer / value / sibling entries are accounted the + * way we expect them to be. + */ +static noinline void check_account(struct xarray *xa) +{ +#ifdef CONFIG_XARRAY_MULTI + unsigned int order; + + for (order = 1; order < 12; order++) { + XA_STATE(xas, xa, 1 << order); + + xa_store_order(xa, 0, order, xa, GFP_KERNEL); + xas_load(&xas); + XA_BUG_ON(xa, xas.xa_node->count == 0); + XA_BUG_ON(xa, xas.xa_node->count > (1 << order)); + XA_BUG_ON(xa, xas.xa_node->nr_values != 0); + + xa_store_order(xa, 1 << order, order, xa_mk_value(1 << order), + GFP_KERNEL); + XA_BUG_ON(xa, xas.xa_node->count != xas.xa_node->nr_values * 2); + + xa_erase(xa, 1 << order); + XA_BUG_ON(xa, xas.xa_node->nr_values != 0); + + xa_erase(xa, 0); + XA_BUG_ON(xa, !xa_empty(xa)); + } +#endif +} + static noinline void check_destroy(struct xarray *xa) { unsigned long index; @@ -1068,6 +1099,7 @@ static int xarray_checks(void) check_xa_alloc(); check_find(&array); check_find_entry(&array); + check_account(&array); check_destroy(&array); check_move(&array); check_create_range(&array); |