fault_in_user_writeable (9) Linux Manual Page
fault_in_user_writeable – Fault in user address and verify RW access
Synopsis
int fault_in_user_writeable(u32 __user *uaddr);Arguments
uaddr
-
- pointer to faulting user space address
Description
Slow path to fixup the fault we just took in the atomic write access to uaddr.
We have no generic implementation of a non-destructive write to the user address. We know that we faulted in the atomic pagefault disabled section so we can as well avoid the #PF overhead by calling get_user_pages right away.
Author
Rusty Russell <rusty [at] rustcorp.com.au>
- Author.