Revert "mm/sparsemem: fix race in accessing memory_section->usage"
This reverts commit b448de24 which is commit 5ec8e8ea upstream. It breaks the Android kernel abi and can be brought back in the future in an abi-safe way if it is really needed. Bug: 161946584 Change-Id: Id78d131f9d910aa331832fb9b7cda4088e37d5f2 Signed-off-by:Greg Kroah-Hartman <gregkh@google.com>
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