missed this
Revert "zram: optimize memory operations with clear_page()/copy_page()"

This reverts commit b572161b9149e0163497b0234cafff966fb67f18.
Revert "mm/swap: fix race on swap_info reuse between swapoff and swapon"

This reverts commit 26b665c53c8111e4aabb655f64344c7233be19fe.
Revert "mm/Kconfig: add ZSWAP writeback options"

This reverts commit 6b2edc80aee1d9800a6a2ac384ee57c4d3043236.