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)