[PATCH -mm -V3 01/21] mm, THP, swap: Enable PMD swap operations for CONFIG_THP_SWAP

From: Huang Ying Previously, the PMD swap operations are only enabled for CONFIG_ARCH_ENABLE_THP_MIGRATION. Because they are only used by the THP migration support. We will support PMD swap mapping to the huge swap cluster and swapin the THP as a whole. That will be

[PATCH -mm -V3 01/21] mm, THP, swap: Enable PMD swap operations for CONFIG_THP_SWAP

From: Huang Ying Previously, the PMD swap operations are only enabled for CONFIG_ARCH_ENABLE_THP_MIGRATION. Because they are only used by the THP migration support. We will support PMD swap mapping to the huge swap cluster and swapin the THP as a whole. That will be enabled via