kernel

hulk inclusion
category: bugfix
bugzilla: 186973, https://gitee.com/openeuler/kernel/issues/I5CA6K


CVE: NA

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This reverts commit af98db5f.
the patch af98db5f("sched: Fix yet more sched_fork()") may
be cause a process sleep at cgroup_post_fork()->freezer_fork()
while taking group_threadgroup_rwsem lock long time, it cause
a problem that other tasks will wait while fork child process
and the system will stall.

Signed-off-by: Zhang Qiao <zhangqiao22@huawei.com>
Reviewed-by: Chen Hui <judy.chenhui@huawei.com>
Signed-off-by: Yongqiang Liu <liuyongqiang13@huawei.com>