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-rw-r--r--fs/super.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/super.c b/fs/super.c
index f35ac60..1527e6a 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -37,6 +37,7 @@
#include <linux/kobject.h>
#include <linux/mutex.h>
#include <linux/file.h>
+#include <linux/backing-dev.h>
#include <asm/uaccess.h>
#include "internal.h"
@@ -693,6 +694,7 @@ int set_anon_super(struct super_block *s, void *data)
return -EMFILE;
}
s->s_dev = MKDEV(0, dev & MINORMASK);
+ s->s_bdi = &noop_backing_dev_info;
return 0;
}
@@ -954,10 +956,11 @@ vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void
if (error < 0)
goto out_free_secdata;
BUG_ON(!mnt->mnt_sb);
+ WARN_ON(!mnt->mnt_sb->s_bdi);
- error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata);
- if (error)
- goto out_sb;
+ error = security_sb_kern_mount(mnt->mnt_sb, flags, secdata);
+ if (error)
+ goto out_sb;
/*
* filesystems should never set s_maxbytes larger than MAX_LFS_FILESIZE
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