arch: setup PF_IO_WORKER threads like PF_KTHREAD
stable inclusion from stable-v5.10.162 commit 320c8057eceb18c5d836fcbe0ffb0035fcfe28ff category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6LQMS Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=320c8057eceb18c5d836fcbe0ffb0035fcfe28ff -------------------------------- PF_IO_WORKER are kernel threads too, but they aren't PF_KTHREAD in the sense that we don't assign ->set_child_tid with our own structure. Just ensure that every arch sets up the PF_IO_WORKER threads like kthreads in the arch implementation of copy_thread(). Signed-off-by: NJens Axboe <axboe@kernel.dk> Conflict: arch/s390/kernel/process.c arch/x86/kernel/process.c Signed-off-by: NLi Lingfeng <lilingfeng3@huawei.com> (cherry picked from commit 5b0c03b1)
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