Commit 062b7359 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

XArray: Test two more things about xa_cmpxchg 



1. If we xa_cmpxchg() an entry in, it marks the index as not free.
2. If we xa_cmpxchg() NULL in, it marks the index as free.

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
parent a219b856

lib/test_xarray.c

+3 −0
Original line number Diff line number Diff line
@@ -393,6 +393,9 @@ static noinline void check_cmpxchg(struct xarray *xa) 
	XA_BUG_ON(xa, xa_cmpxchg(xa, 12345678, FIVE, LOTS, GFP_KERNEL) != FIVE);

	XA_BUG_ON(xa, xa_cmpxchg(xa, 5, FIVE, NULL, GFP_KERNEL) != NULL);

	XA_BUG_ON(xa, xa_cmpxchg(xa, 5, NULL, FIVE, GFP_KERNEL) != NULL);

	XA_BUG_ON(xa, xa_insert(xa, 5, FIVE, GFP_KERNEL) != -EBUSY);

	XA_BUG_ON(xa, xa_cmpxchg(xa, 5, FIVE, NULL, GFP_KERNEL) != FIVE);

	XA_BUG_ON(xa, xa_insert(xa, 5, FIVE, GFP_KERNEL) == -EBUSY);

	xa_erase_index(xa, 12345678);

	xa_erase_index(xa, 5);

	XA_BUG_ON(xa, !xa_empty(xa));