From 3012110d71f41410932924e1d188f9eb57f1f824 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Thu, 19 Nov 2020 08:32:31 -0500 Subject: XArray: Fix splitting to non-zero orders Splitting an order-4 entry into order-2 entries would leave the array containing pointers to 000040008000c000 instead of 000044448888cccc. This is a one-character fix, but enhance the test suite to check this case. Reported-by: Zi Yan Signed-off-by: Matthew Wilcox (Oracle) --- lib/xarray.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'lib/xarray.c') diff --git a/lib/xarray.c b/lib/xarray.c index fb3a0ccebb7e..f5d8f54907b4 100644 --- a/lib/xarray.c +++ b/lib/xarray.c @@ -1011,7 +1011,7 @@ void xas_split_alloc(struct xa_state *xas, void *entry, unsigned int order, do { unsigned int i; - void *sibling; + void *sibling = NULL; struct xa_node *node; node = kmem_cache_alloc(radix_tree_node_cachep, gfp); @@ -1021,7 +1021,7 @@ void xas_split_alloc(struct xa_state *xas, void *entry, unsigned int order, for (i = 0; i < XA_CHUNK_SIZE; i++) { if ((i & mask) == 0) { RCU_INIT_POINTER(node->slots[i], entry); - sibling = xa_mk_sibling(0); + sibling = xa_mk_sibling(i); } else { RCU_INIT_POINTER(node->slots[i], sibling); } -- cgit v1.2.3