radix-tree: add test for radix_tree_locate_item()
Add a unit test that provides coverage for the bug fixed in the commit entitled "radix-tree: rewrite radix_tree_locate_item fix" from Hugh Dickins. I've verified that this test fails before his patch due to miscalculated 'index' values in __locate() in lib/radix-tree.c, and passes with his fix. Link: http://lkml.kernel.org/r/1462307263-20623-1-git-send-email-ross.zwisler@linux.intel.com Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
parent
0a2efc6c80
commit
eb73f7f330
1
tools/testing/radix-tree/linux/init.h
Normal file
1
tools/testing/radix-tree/linux/init.h
Normal file
|
@ -0,0 +1 @@
|
|||
/* An empty file stub that allows radix-tree.c to compile. */
|
|
@ -232,7 +232,7 @@ void copy_tag_check(void)
|
|||
item_kill_tree(&tree);
|
||||
}
|
||||
|
||||
void __locate_check(struct radix_tree_root *tree, unsigned long index,
|
||||
static void __locate_check(struct radix_tree_root *tree, unsigned long index,
|
||||
unsigned order)
|
||||
{
|
||||
struct item *item;
|
||||
|
@ -248,12 +248,25 @@ void __locate_check(struct radix_tree_root *tree, unsigned long index,
|
|||
}
|
||||
}
|
||||
|
||||
static void __order_0_locate_check(void)
|
||||
{
|
||||
RADIX_TREE(tree, GFP_KERNEL);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < 50; i++)
|
||||
__locate_check(&tree, rand() % INT_MAX, 0);
|
||||
|
||||
item_kill_tree(&tree);
|
||||
}
|
||||
|
||||
static void locate_check(void)
|
||||
{
|
||||
RADIX_TREE(tree, GFP_KERNEL);
|
||||
unsigned order;
|
||||
unsigned long offset, index;
|
||||
|
||||
__order_0_locate_check();
|
||||
|
||||
for (order = 0; order < 20; order++) {
|
||||
for (offset = 0; offset < (1 << (order + 3));
|
||||
offset += (1UL << order)) {
|
||||
|
|
Loading…
Reference in a new issue