summaryrefslogtreecommitdiff
path: root/include/linux/backing-dev.h
diff options
context:
space:
mode:
authorJan Kara <jack@suse.cz>2022-06-15 15:22:29 +0200
committerJan Kara <jack@suse.cz>2022-06-16 10:55:57 +0200
commit4bca7e80b6455772b4bf3f536dcbc19aac424d6a (patch)
tree87cbecab60fbd8d7ebfc8281ff0e818de159bff4 /include/linux/backing-dev.h
parent27cfa258951a465e3eae63ee1e715e902cd45578 (diff)
init: Initialize noop_backing_dev_info early
noop_backing_dev_info is used by superblocks of various pseudofilesystems such as kdevtmpfs. After commit 10e14073107d ("writeback: Fix inode->i_io_list not be protected by inode->i_lock error") this broke because __mark_inode_dirty() started to access more fields from noop_backing_dev_info and this led to crashes inside locked_inode_to_wb_and_lock_list() called from __mark_inode_dirty(). Fix the problem by initializing noop_backing_dev_info before the filesystems get mounted. Fixes: 10e14073107d ("writeback: Fix inode->i_io_list not be protected by inode->i_lock error") Reported-and-tested-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reported-and-tested-by: Alexandru Elisei <alexandru.elisei@arm.com> Reported-and-tested-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'include/linux/backing-dev.h')
-rw-r--r--include/linux/backing-dev.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index 2bd073fa6bb5..d452071db572 100644
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -119,6 +119,8 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio);
extern struct backing_dev_info noop_backing_dev_info;
+int bdi_init(struct backing_dev_info *bdi);
+
/**
* writeback_in_progress - determine whether there is writeback in progress
* @wb: bdi_writeback of interest