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authorMatthew Wilcox <willy@infradead.org>2017-11-10 09:34:31 -0500
committerMatthew Wilcox <willy@infradead.org>2018-10-21 10:45:57 -0400
commit9b89a0355144685a787b0dc5bcf7bdd6f2d02968 (patch)
tree5e9d4f434e638313df1f9d96c145097b9897d122 /lib/test_xarray.c
parentad3d6c7263e368abdc151e1cc13dc78aa39cc7a7 (diff)
downloadlinux-stericsson-9b89a0355144685a787b0dc5bcf7bdd6f2d02968.tar.gz
xarray: Add XArray marks
XArray marks are like the radix tree tags, only slightly more strongly typed. They are renamed in order to distinguish them from tagged pointers. This commit adds the basic get/set/clear operations. Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'lib/test_xarray.c')
-rw-r--r--lib/test_xarray.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/test_xarray.c b/lib/test_xarray.c
index a7248b87617f..f8b0e9ba80a4 100644
--- a/lib/test_xarray.c
+++ b/lib/test_xarray.c
@@ -67,11 +67,45 @@ static noinline void check_xa_load(struct xarray *xa)
XA_BUG_ON(xa, !xa_empty(xa));
}
+static noinline void check_xa_mark_1(struct xarray *xa, unsigned long index)
+{
+ /* NULL elements have no marks set */
+ XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
+ xa_set_mark(xa, index, XA_MARK_0);
+ XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
+
+ /* Storing a pointer will not make a mark appear */
+ XA_BUG_ON(xa, xa_store_index(xa, index, GFP_KERNEL) != NULL);
+ XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
+ xa_set_mark(xa, index, XA_MARK_0);
+ XA_BUG_ON(xa, !xa_get_mark(xa, index, XA_MARK_0));
+
+ /* Setting one mark will not set another mark */
+ XA_BUG_ON(xa, xa_get_mark(xa, index + 1, XA_MARK_0));
+ XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_1));
+
+ /* Storing NULL clears marks, and they can't be set again */
+ xa_erase_index(xa, index);
+ XA_BUG_ON(xa, !xa_empty(xa));
+ XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
+ xa_set_mark(xa, index, XA_MARK_0);
+ XA_BUG_ON(xa, xa_get_mark(xa, index, XA_MARK_0));
+}
+
+static noinline void check_xa_mark(struct xarray *xa)
+{
+ unsigned long index;
+
+ for (index = 0; index < 16384; index += 4)
+ check_xa_mark_1(xa, index);
+}
+
static RADIX_TREE(array, GFP_KERNEL);
static int xarray_checks(void)
{
check_xa_load(&array);
+ check_xa_mark(&array);
printk("XArray: %u of %u tests passed\n", tests_passed, tests_run);
return (tests_run == tests_passed) ? 0 : -EINVAL;