!1802 zram: Support multiple compression streams

Merge Pull Request from: @ci-robot 
 
PR sync from: Jinjiang Tu <tujinjiang@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/UAQZCBQFUA5LYCLXXVHHJGAK2GNRA6LC/ 
Support multiple compression streams for zram.

Alexey Romanov (1):
  zram: add size class equals check into recompression

Andy Shevchenko (1):
  lib/cmdline: Export next_arg() for being used in modules

Ming Lei (1):
  zram: fix race between zram_reset_device() and disksize_store()

Sergey Senozhatsky (11):
  zram: preparation for multi-zcomp support
  zram: add recompression algorithm sysfs knob
  zram: factor out WB and non-WB zram read functions
  zram: introduce recompress sysfs knob
  zram: add recompress flag to read_block_state()
  zram: clarify writeback_store() comment
  zram: remove redundant checks from zram_recompress()
  zram: add algo parameter support to zram_recompress()
  documentation: add zram recompression documentation
  zram: add incompressible writeback
  zram: add incompressible flag to read_block_state()


-- 
2.25.1
 
https://gitee.com/openeuler/kernel/issues/I7TWVA 
 
Link:https://gitee.com/openeuler/kernel/pulls/1802

 

Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>