Le Fri, 07 Dec 2007 10:28:53 +0100, Peter Poulsen <peter@xxxxxxxxx> a écrit : > I have noticed __user in some code, when a pointer points to > userspace code. What does that do exaclty? AFAIK, they are used by sparse[1] to verify that the kernel code doesn't access directly to pointers pointing to userspace part of the address space, but rather use the copy_from_user(), copy_to_user() functions or one of their variants. Thomas [1] http://www.kernel.org/pub/software/devel/sparse/ -- Thomas Petazzoni, thomas.petazzoni@xxxxxxxx, http://thomas.enix.org Jabber, thomas.petazzoni@xxxxxxxxx Toulibre, http://www.toulibre.org - APRIL, http://www.april.org Fingerprint : 0BE1 4CF3 CEA4 AC9D CC6E 1624 F653 CB30 98D3 F7A7 -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
