From: Matthew Wilcox (Oracle) Date: Tue, 31 Mar 2020 18:23:59 +0000 (-0400) Subject: XArray: Test two more things about xa_cmpxchg X-Git-Tag: v5.10-rc1~69^2~6 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=062b735912b9f3aa3e14cd02b5ede08cf8bc093f;p=thirdparty%2Flinux.git 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: Matthew Wilcox (Oracle) --- diff --git a/lib/test_xarray.c b/lib/test_xarray.c index d4f97925dbd8d..9fc3da430aba1 100644 --- a/lib/test_xarray.c +++ b/lib/test_xarray.c @@ -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));