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