From: Christoph Hellwig <hch@lst.de> mainline inclusion from mainline-v5.11-rc1 commit f7387170339afb473a0d95b7732f904346f9795e category: bugfix issue: #I3ZXZF CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... ----------------------------------------------- BDIs get unregistered during device removal, and this WARN can be trivially triggered by hot-removing a NVMe device while running fsx It is otherwise harmless as we still hold a BDI reference, and the writeback has been shut down already. Link: https://lore.kernel.org/r/20200928122613.434820-1-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Ye Bin <yebin10@huawei.com> Reviewed-by: Zhang Yi <yi.zhang@huawei.com> Signed-off-by: Chen Jun <chenjun102@huawei.com> Signed-off-by: Yu Changchun <yuchangchun1@huawei.com> --- fs/fs-writeback.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index a0869194ab73..050d40c465bc 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -2304,10 +2304,6 @@ void __mark_inode_dirty(struct inode *inode, int flags) wb = locked_inode_to_wb_and_lock_list(inode); - WARN((wb->bdi->capabilities & BDI_CAP_WRITEBACK) && - !test_bit(WB_registered, &wb->state), - "bdi-%s not registered\n", bdi_dev_name(wb->bdi)); - inode->dirtied_when = jiffies; if (dirtytime) inode->dirtied_time_when = jiffies; -- 2.22.0