[PATCH -next v9 0/3] Delay the initialization of zswap

[Liu Shixin <liushixin2@huawei.com>]

In the initialization of zswap, about 18MB memory will be allocated for
zswap_pool. Since some users may not use zswap, the zswap_pool is wasted.
Save memory by delaying the initialization of zswap until enabled.

v8->v9: Fix some pattern problem suggested by Christoph.
v7->v8: Do some cleanup. And remove the second patch in v7 which is unrelated
	to the initialization of zswap.
v6->v7: Add two new patch[1,3] to cleanup the code. And cover zswap_init_*
	parameter by zswap_init_lock to protect against conflicts.
v5->v6: Simplify the code and delete the patches about frontswap suggested
	by Christoph.

Liu Shixin (3):
  mm/zswap: remove zswap_entry_cache_{create,destroy} helper function
  mm/zswap: replace zswap_init_{started/failed} with zswap_init_state
  mm/zswap: delay the initialization of zswap

 mm/zswap.c | 122 +++++++++++++++++++++++++++++++++--------------------
 1 file changed, 77 insertions(+), 45 deletions(-)

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2.25.1