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| author | Matthew Wilcox <willy@infradead.org> | 2017-11-17 14:16:34 +0100 |
|---|---|---|
| committer | Matthew Wilcox <willy@infradead.org> | 2018-10-21 16:45:59 +0200 |
| commit | 687149fca1f37c447e5d161e0a4a04cb2c880cb6 (patch) | |
| tree | 5134bc243622997b10644a67a55ee51e6278930a /lib/test_xarray.c | |
| parent | xarray: Extract entries from an XArray (diff) | |
| download | linux-687149fca1f37c447e5d161e0a4a04cb2c880cb6.tar.xz linux-687149fca1f37c447e5d161e0a4a04cb2c880cb6.zip | |
xarray: Destroy an XArray
This function frees all the internal memory allocated to the xarray
and reinitialises it to be empty.
Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'lib/test_xarray.c')
| -rw-r--r-- | lib/test_xarray.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/test_xarray.c b/lib/test_xarray.c index e3c2d4d00b15..a96f67caa1c2 100644 --- a/lib/test_xarray.c +++ b/lib/test_xarray.c @@ -465,6 +465,39 @@ static noinline void check_find(struct xarray *xa) check_multi_find_2(xa); } +static noinline void check_destroy(struct xarray *xa) +{ + unsigned long index; + + XA_BUG_ON(xa, !xa_empty(xa)); + + /* Destroying an empty array is a no-op */ + xa_destroy(xa); + XA_BUG_ON(xa, !xa_empty(xa)); + + /* Destroying an array with a single entry */ + for (index = 0; index < 1000; index++) { + xa_store_index(xa, index, GFP_KERNEL); + XA_BUG_ON(xa, xa_empty(xa)); + xa_destroy(xa); + XA_BUG_ON(xa, !xa_empty(xa)); + } + + /* Destroying an array with a single entry at ULONG_MAX */ + xa_store(xa, ULONG_MAX, xa, GFP_KERNEL); + XA_BUG_ON(xa, xa_empty(xa)); + xa_destroy(xa); + XA_BUG_ON(xa, !xa_empty(xa)); + +#ifdef CONFIG_XARRAY_MULTI + /* Destroying an array with a multi-index entry */ + xa_store_order(xa, 1 << 11, 11, xa, GFP_KERNEL); + XA_BUG_ON(xa, xa_empty(xa)); + xa_destroy(xa); + XA_BUG_ON(xa, !xa_empty(xa)); +#endif +} + static DEFINE_XARRAY(array); static int xarray_checks(void) @@ -478,6 +511,7 @@ static int xarray_checks(void) check_cmpxchg(&array); check_multi_store(&array); check_find(&array); + check_destroy(&array); printk("XArray: %u of %u tests passed\n", tests_passed, tests_run); return (tests_run == tests_passed) ? 0 : -EINVAL; |