NAME

UFFDIO_UNREGISTER - unregister a memory address range from userfaultfd

LIBRARY

Standard C library (libc, -lc)

SYNOPSIS

#include <linux/userfaultfd.h>  /* Definition of UFFD* constants */
#include <sys/ioctl.h>

int ioctl(int fd, UFFDIO_UNREGISTER, const struct uffdio_range *argp);

DESCRIPTION

Unregister a memory address range from userfaultfd. The pages in the range must be “compatible” (see UFFDIO_REGISTER(2const)).

RETURN VALUE

On success, 0 is returned. On error, -1 is returned and errno is set to indicate the error.

ERRORS

EINVAL

Either argp->start or the argp->len fields was not a multiple of the system page size; or the argp->len field was zero; or these fields were otherwise invalid.

EINVAL

There as an incompatible mapping in the specified address range.

EINVAL

There was no mapping in the specified address range.

STANDARDS

Linux.

HISTORY

Linux 4.3.

EXAMPLES

See userfaultfd(2).

SEE ALSO

ioctl(2), ioctl_userfaultfd(2), UFFDIO_REGISTER(2const), userfaultfd(2)

linux.git/Documentation/admin-guide/mm/userfaultfd.rst