tree 54df7ab53c1f625179e2b69c78b782b5a867363e
parent 09729a9919fdaf137995b0f19cbd401e22229cac
author Alexey Dobriyan <adobriyan@gmail.com> 1235138673 +0300
committer Alexey Dobriyan <adobriyan@gmail.com> 1238447667 +0400

proc 1/2: do PDE usecounting even for ->read_proc, ->write_proc

struct proc_dir_entry::owner is going to be removed. Now it's only necessary
to protect PDEs which are using ->read_proc, ->write_proc hooks.

However, ->owner assignments are racy and make it very easy for someone to switch
->owner on live PDE (as some subsystems do) without fixing refcounts and so on.

http://bugzilla.kernel.org/show_bug.cgi?id=12454

So, ->owner is on death row.

Proxy file operations exist already (proc_file_operations), just bump usecount
when necessary.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>