Scroll to navigation

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

u32 __user * 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@rustcorp.com.au>

Author.

COPYRIGHT

September 2017 Kernel Hackers Manual 4.12