mainline inclusion
from mainline-5.0
commit b77fa617a2ff
category: bugfix
bugzilla: 5889
CVE: NA

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

Since the console writer does not use the preallocated crash dump buffer
any more, there is no reason to perform locking around it.

Fixes: 70ad35db ("pstore: Convert console write to use ->write_buf")
Signed-off-by: NKees Cook <keescook@chromium.org>
Reviewed-by: NJoel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: NHou Tao <houtao1@huawei.com>
Reviewed-by: NYufen Yu <yuyufen@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>