The patch titled
Subject: mm: fix commit "mm: start tracking VMAs with maple tree"
has been added to the -mm tree. Its filename is
mm-start-tracking-vmas-with-maple-tree-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-start-tracking-vmas-with-maple-tree-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-start-tracking-vmas-with-maple-tree-fix.patch
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------------------------------------------------------
From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Subject: mm: fix commit "mm: start tracking VMAs with maple tree"
Hold the lock for the destruction of the maple tree to avoid lockdep
issues - and potentially process_mrelease.
Link: https://lkml.kernel.org/r/20220420134336.bny7wza3ez2ldjsd@revolver
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Reported-by: Yu Zhao <yuzhao@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/mmap.c~mm-start-tracking-vmas-with-maple-tree-fix
+++ a/mm/mmap.c
@@ -3319,9 +3319,9 @@ void exit_mmap(struct mm_struct *mm)
cond_resched();
}
mm->mmap = NULL;
- mmap_write_unlock(mm);
trace_exit_mmap(mm);
__mt_destroy(&mm->mm_mt);
+ mmap_write_unlock(mm);
vm_unacct_memory(nr_accounted);
}
_
Patches currently in -mm which might be from Liam.Howlett@xxxxxxxxxx are
maple-tree-add-new-data-structure-fix-2.patch
mm-start-tracking-vmas-with-maple-tree-fix.patch
