block: refactor bd_start_claiming · Pull Request !537 · OpenCloudOS/OpenCloudOS-Kernel

在 https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel/pulls/524 中解决BUG，但 patchset [1][2][3] 需同时合入，否则，将导致内核 crash，例如执行 `lvcreate -L 1G -T ..`操作。

这个 PR 直接合入了社区补丁 [1]，经验证解决crash问题。

```log
[  210.243814] ------------[ cut here ]------------
[  210.243820] kernel BUG at fs/block_dev.c:1200!
[  210.244317] Internal error: Oops - BUG: 0 [#1] SMP
[  210.244762] Modules linked in: xt_multiport ipt_rpfilter xt_CT ip_set_hash_net vxlan ip6_udp_tunnel udp_tunnel xfrm_user xfrm_algo iptable_filter veth ip6t_REJECT nf_reject_ipv6 nf_conntrack_netlink ipt_REJECT nf_reject_ipv4 xt_mark xt_addrtype xt_MASQUERADE xt_set ip_set_hash_ip ip_set_hash_ipportnet ip_set_bitmap_port ip_set_hash_ipportip ip_set_hash_ipport ip_vs_rr ip_set ip_vs xt_nat tcp_diag inet_diag nft_chain_nat nf_nat xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_comment nft_compat nft_counter nf_tables nfnetlink 8021q garp mrp bonding dummy overlay vfat fat dm_multipath ipmi_ssif ipmi_si ipmi_devintf ipmi_msghandler sch_fq_codel nvme_rdma(O) mlx_compat(O) br_netfilter bridge stp llc ip_tables xfs ast drm_vram_helper ttm drm_kms_helper drm ixgbe autofs4
[  210.250921] CPU: 21 PID: 64021 Comm: lvm Kdump: loaded Tainted: G           O      5.4.119-19.0009.54_2 #1
[  210.251891] Hardware name: GreatWall \xe6\x93\x8e\xe5\xa4\xa9DF720/N/A, BIOS 601FBE28 2020/04/20
[  210.252605] pstate: 00000005 (nzcv daif -PAN -UAO)
[  210.253074] pc : bd_clear_claiming+0x30/0x38
[  210.253466] lr : truncate_bdev_range+0x98/0x148
[  210.253874] sp : ffff80009076fc30
[  210.254197] x29: ffff80009076fc30 x28: ffff028273ac0000
[  210.254691] x27: 0000000000000000 x26: 0000000000000000
[  210.255175] x25: 0000000056000000 x24: ffff0283abef0000
[  210.255655] x23: 0000000000000fff x22: 0000000000000000
[  210.256150] x21: ffff8000403ad788 x20: ffff800041903000
[  210.256642] x19: 0000000000000000 x18: 0000000000000000
[  210.257113] x17: 0000000000000000 x16: 0000000000000000
[  210.257538] x15: 0000000000000000 x14: 0000000000000000
[  210.257980] x13: 0000000000000000 x12: 0000000000000000
[  210.258461] x11: 0000000000000000 x10: 0000000000000000
[  210.258927] x9 : ffff8000403ad820 x8 : ffff028274dc1000
[  210.259391] x7 : 0000000000000000 x6 : 000000000000003f
[  210.259845] x5 : 0000000000000040 x4 : ffff800041903600
[  210.260272] x3 : 0000000000000000 x2 : 0000000000000000
[  210.260703] x1 : ffff8000403ad788 x0 : ffff0283abef0000
[  210.261130] Call trace:
[  210.261424]  bd_clear_claiming+0x30/0x38
[  210.261730]  truncate_bdev_range+0x98/0x148
[  210.262118]  blkdev_ioctl+0xaf4/0xc78
[  210.262414]  block_ioctl+0x3c/0x48
[  210.262706]  do_vfs_ioctl+0xc0/0xad0
[  210.263038]  ksys_ioctl+0xc0/0x550
[  210.263319]  __arm64_sys_ioctl+0x24/0x68
[  210.263653]  el0_svc_common.constprop.2+0x90/0x170
[  210.264050]  el0_svc_handler+0x30/0x98
[  210.264344]  el0_svc+0x8/0x200
[  210.264595] Code: f8038c1f 97f663bd a8c17bfd d65f03c0 (d4210000)
[  210.265113] SMP: stopping secondary CPUs
[  210.270398] Starting crashdump kernel...
[  210.271543] Bye!
```

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=58e46ed9cc634b3c64ea402789f8a92ce45cee48
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=384d87ef2c954fc58e6c5fd8253e4a1984f5fe02
[3] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=d44c9780ed40db88626c9354868eab72159c7a7f

Ached-by: Ge Changzhong <gechangzhong@cestc.cn>
Signed-off-by: Zhang Yanjun <zhangyanjun@cestc.cn>
Tested-by: Li Yibo <liyibo@cestc.cn>
Committed-by: Rong Tao <rongtao@cestc.cn>

类型	指派人员	状态
审查	chinaljp030 刘诗	已完成 (0/0人)
测试	chinaljp030 刘诗	已完成 (0/0人)

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