From d2ff6ff6bf0e18e6d779e6d5561cdf664dce63c2 Mon Sep 17 00:00:00 2001 From: "Liam R. Howlett" Date: Mon, 27 Mar 2023 14:55:32 -0400 Subject: [PATCH] mm: enable maple tree RCU mode by default. we don't need to free the nodes with RCU Link: https://lkml.kernel.org/r/20230227173632.3292573-9-surenb@google.com Link: https://lore.kernel.org/linux-mm/000000000000b0a65805f663ace6@google.com/ Link: https://lkml.kernel.org/r/20230327185532.2354250-9-Liam.Howlett@oracle.com Cc: stable@vger.kernel.org Fixes: d4af56c5c7c6 ("mm: start tracking VMAs with maple tree") Signed-off-by: Liam R. Howlett Reported-by: syzbot+8d95422d3537159ca390@syzkaller.appspotmail.com Signed-off-by: Andrew Morton --- mm/mmap.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index a30e8a784b53..ff68a67a2a7c 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2277,8 +2277,7 @@ do_vmi_align_munmap(struct vma_iterator *vmi, struct vm_area_struct *vma, int count = 0; int error = -ENOMEM; MA_STATE(mas_detach, &mt_detach, 0, 0); - mt_init_flags(&mt_detach, vmi->mas.tree->ma_flags & - (MT_FLAGS_LOCK_MASK | MT_FLAGS_USE_RCU)); + mt_init_flags(&mt_detach, vmi->mas.tree->ma_flags & MT_FLAGS_LOCK_MASK); mt_set_external_lock(&mt_detach, &mm->mmap_lock); /* -- 2.50.1