diff options
| author | Liam R. Howlett <Liam.Howlett@oracle.com> | 2023-07-24 14:31:48 -0400 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-18 10:12:48 -0700 |
| commit | 53bee98d004fcd7062f2fe056720704e947e6000 (patch) | |
| tree | eeb3c78fcc8a561cccadbe71a552c72fbd0a1e3f /mm/internal.h | |
| parent | c1297987cc2ada57a7faea7985c2334548d110f9 (diff) | |
| download | lwn-53bee98d004fcd7062f2fe056720704e947e6000.tar.gz lwn-53bee98d004fcd7062f2fe056720704e947e6000.zip | |
mm: remove re-walk from mmap_region()
Using vma_iter_set() will reset the tree and cause a re-walk. Use
vmi_iter_config() to set the write to a sub-set of the range. Change
the file case to also use vmi_iter_config() so that the end is correctly
set.
Link: https://lkml.kernel.org/r/20230724183157.3939892-7-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index 7d11ebe5d11c..c5ba08f55deb 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1041,6 +1041,14 @@ static inline bool vma_soft_dirty_enabled(struct vm_area_struct *vma) return !(vma->vm_flags & VM_SOFTDIRTY); } +static inline void vma_iter_config(struct vma_iterator *vmi, + unsigned long index, unsigned long last) +{ + MAS_BUG_ON(&vmi->mas, vmi->mas.node != MAS_START && + (vmi->mas.index > index || vmi->mas.last < index)); + __mas_set_range(&vmi->mas, index, last - 1); +} + /* * VMA Iterator functions shared between nommu and mmap */ |