mm: oom_kill: fix KABI broken by "oom_kill.c: futex: delay the OOM reaper to...

mm: oom_kill: fix KABI broken by "oom_kill.c: futex: delay the OOM reaper to allow time for proper futex cleanup"

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I61FDP


CVE: NA

-------------------------------

Move oom_reaper_timer from task_struct to task_struct_resvd to fix KABI
broken.

Signed-off-by: Ma Wupeng <mawupeng1@huawei.com>
Reviewed-by: Nanyong Sun <sunnanyong@huawei.com>
Reviewed-by: chenhui 00515652 <judy.chenhui@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>