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mm/mmap: write-lock VMAs in vma_prepare before modifying them
authorSuren Baghdasaryan <surenb@google.com>
Mon, 27 Feb 2023 17:36:15 +0000 (09:36 -0800)
committerAndrew Morton <akpm@linux-foundation.org>
Wed, 5 Apr 2023 23:02:08 +0000 (16:02 -0700)
commit9a66c59338abacec5edc7dcf232bd93192114a54
tree021b3fe618a5fc3aff0552d2c053104ceee918ddtree
parent8b2608648dae49e44049969793772e9d084b17eecommit | diff
mm/mmap: write-lock VMAs in vma_prepare before modifying them

Write-lock all VMAs which might be affected by a merge, split, expand or
shrink operations.  All these operations use vma_prepare() before making
the modifications, therefore it provides a centralized place to perform
VMA locking.

Link: https://lkml.kernel.org/r/20230227173632.3292573-17-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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