blob: 3f435d7fca5e62bc999e48c6a4f3e1c0fc86def9 [file] [log] [blame]
* User address space access functions.
* For licencing details see kernel-base/COPYING
#include <linux/uaccess.h>
#include <linux/export.h>
#include <asm/tlbflush.h>
* We rely on the nested NMI work to allow atomic faults from the NMI path; the
* nested NMI paths are careful to preserve CR2.
unsigned long
copy_from_user_nmi(void *to, const void __user *from, unsigned long n)
unsigned long ret;
if (__range_not_ok(from, n, TASK_SIZE))
return n;
if (!nmi_uaccess_okay())
return n;
* Even though this function is typically called from NMI/IRQ context
* disable pagefaults so that its behaviour is consistent even when
* called form other contexts.
ret = __copy_from_user_inatomic(to, from, n);
return ret;