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