FAULT_IN_USER_WRITEA(9)                Futex API reference                FAULT_IN_USER_WRITEA(9)



NAME
       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.au>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                   FAULT_IN_USER_WRITEA(9)