[PATCH -mm 02/21] mm, THP, swap: Make CONFIG_THP_SWAP depends on CONFIG_SWAP

From: Huang Ying It's unreasonable to optimize swapping for THP without basic swapping support. And this will cause build errors when THP_SWAP functions are defined in swapfile.c and called elsewhere. The comments are fixed too to reflect the latest progress.

[PATCH -mm 02/21] mm, THP, swap: Make CONFIG_THP_SWAP depends on CONFIG_SWAP

From: Huang Ying It's unreasonable to optimize swapping for THP without basic swapping support. And this will cause build errors when THP_SWAP functions are defined in swapfile.c and called elsewhere. The comments are fixed too to reflect the latest progress. Signed-off-by: "Huang, Ying" Cc: