Some filesystems forego the use of normal vfs calls to create struct files. Make sure that these users elevate the mnt writer count. These probably don't have any real meaning because there is no real backing store for these mounts, but it is here for consistency. Signed-off-by: Dave Hansen <haveblue at us.ibm.com> --- lxc-dave/fs/file_table.c | 4 ++++ 1 file changed, 4 insertions(+) diff -puN fs/file_table.c~22-24-elevate-writer-count-for-custom-struct-file fs/file_table.c --- lxc/fs/file_table.c~22-24-elevate-writer-count-for-custom-struct-file 2006-12-11 14:22:12.000000000 -0800 +++ lxc-dave/fs/file_table.c 2006-12-11 14:22:12.000000000 -0800 @@ -164,6 +164,10 @@ int init_file(struct file *file, struct file->f_mapping = dentry->d_inode->i_mapping; file->f_mode = mode; file->f_op = fop; + if (mode & FMODE_WRITE) { + error = mnt_want_write(mnt); + WARN_ON(error); + } return error; } _