[PATCH] Add ENOSYS into sys_io_cancel

[Shiow-wen Cheng]

Other than few exceptions (e.g. usb/gadget), none of
the current filesystems and/or drivers that has
io_cancel implemented (kiocb->ki_cancel left with
NULL). However, the io_cancel() system call
(sys_io_cancel) somehow universally sets return code
to -EAGAIN. This gives us a false impression that
io_cancel() is supported (implemented) but just never
works - would appreciate if this patch is taken.

-- s.w.

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com

Attachment: cancel.patch
Description: 3748003194-cancel.patch