UFFDIO_UNREGISTER(2const)                            UFFDIO_UNREGISTER(2const)

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

Linux man-pages 6.9.1             2024-06-14         UFFDIO_UNREGISTER(2const)