The patch titled
Subject: mm/mmap: drop VM_BUG_ON() until better tested
has been added to the -mm mm-unstable branch. Its filename is
mm-mmap-use-maple-tree-for-unmapped_area_topdown-fix.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mmap-use-maple-tree-for-unmapped_area_topdown-fix.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Liam Howlett <liam.howlett@xxxxxxxxxx>
Subject: mm/mmap: drop VM_BUG_ON() until better tested
Date: Tue, 19 Jul 2022 17:09:00 +0000
The limits that the maple tree return are trimmed so there is enough space.
Link: https://lkml.kernel.org/r/20220719170841.3298839-1-Liam.Howlett@xxxxxxxxxx
Fixes: Fixes: 06fade172129 ("mm/mmap: use maple tree for unmapped_area{_topdown}")
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 | 4 ----
1 file changed, 4 deletions(-)
--- a/mm/mmap.c~mm-mmap-use-maple-tree-for-unmapped_area_topdown-fix
+++ a/mm/mmap.c
@@ -2037,8 +2037,6 @@ static unsigned long unmapped_area(struc
gap = mas.index;
gap += (info->align_offset - gap) & info->align_mask;
- VM_BUG_ON(gap + info->length > info->high_limit);
- VM_BUG_ON(gap + info->length > mas.last);
return gap;
}
@@ -2068,8 +2066,6 @@ static unsigned long unmapped_area_topdo
gap = mas.last + 1 - info->length;
gap -= (gap - info->align_offset) & info->align_mask;
- VM_BUG_ON(gap < info->low_limit);
- VM_BUG_ON(gap < mas.index);
return gap;
}
_
Patches currently in -mm which might be from liam.howlett@xxxxxxxxxx are
android-binder-fix-lockdep-check-on-clearing-vma.patch
maple-tree-add-new-data-structure-fix.patch
maple-tree-add-new-data-structure-fix-2.patch
mm-start-tracking-vmas-with-maple-tree-fix.patch
mm-mmap-use-maple-tree-for-unmapped_area_topdown-fix.patch
mm-mmap-use-advanced-maple-tree-api-for-mmap_region-fix.patch
mm-mlock-drop-dead-code-in-count_mm_mlocked_page_nr.patch
