Re: [PATCH v6 2/8] debugfs: prevent access to removed files' private data

[Arkady]

Nicolai,

Regarding the debugfs_create_file() which ignores .mmap field in the
struct file_operations. The patch is a part of the kernel 4.8 in the
Ubuntu 16.10 and breaks quite a few online code examples of mmap
drivers.

Is is acceptable to replace the debugfs_create_file() by a macro and
fail the compilation if the .mmap field is not initialized.
Alternatively debugfs_create_file() can return an error if .mmap is
not NULL.

Thank you, Arkady.