path: root/mm/ksm.c
diff options
authorMiaohe Lin <>2021-05-04 18:37:37 -0700
committerLinus Torvalds <>2021-05-05 11:27:24 -0700
commita08e1e11c90f3e6020963b3ad097680768bc8567 (patch)
treede9aed83ea146a8a1c4f5605a8cffbf17021ae04 /mm/ksm.c
parent78fa51503fdbe463c96eef4c3cf69ca54032647a (diff)
ksm: remove redundant VM_BUG_ON_PAGE() on stable_tree_search()
Patch series "Cleanup and fixup for ksm". This series contains cleanups to remove unnecessary VM_BUG_ON_PAGE and dedicated macro KSM_FLAG_MASK. Also this fixes potential missing rmap_item for stable_node which would result in failed rmap_walk_ksm(). More details can be found in the respective changelogs. This patch (of 4): The same VM_BUG_ON_PAGE() check is already done in the callee. Remove these extra caller one to simplify code slightly. Link: Link: Signed-off-by: Miaohe Lin <> Cc: Hugh Dickins <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'mm/ksm.c')
1 files changed, 0 insertions, 2 deletions
diff --git a/mm/ksm.c b/mm/ksm.c
index 9694ee2c71de..7b6bc1036596 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1771,7 +1771,6 @@ chain_append:
* stable_node_dup is the dup to replace.
if (stable_node_dup == stable_node) {
- VM_BUG_ON(is_stable_node_chain(stable_node_dup));
/* chain is missing so create it */
stable_node = alloc_stable_node_chain(stable_node_dup,
@@ -1785,7 +1784,6 @@ chain_append:
* of the current nid for this page
* content.
- VM_BUG_ON(!is_stable_node_chain(stable_node));
VM_BUG_ON(page_node->head != &migrate_nodes);