raw: complete rcu conversion

mainline inclusion
from mainline-v6.0-rc1
commit af185d8c
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6ECEK
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=af185d8c76333daa877678e0166a7b45e63bf3c4



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

raw_diag_dump() can use rcu_read_lock() instead of read_lock()

Now the hashinfo lock is only used from process context,
in write mode only, we can convert it to a spinlock,
and we do not need to block BH anymore.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220620100509.3493504-1-eric.dumazet@gmail.com


Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Conflicts:
	net/ipv4/raw.c
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: Yue Haibing <yuehaibing@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>