UFFDIO_UNREGISTER(2const) — Linux manual page

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

COLOPHON

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

Pages that refer to this page: ioctl_userfaultfd(2), UFFDIO_REGISTER(2const)

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