#include <linux/userfaultfd.h> /* Definition of UFFD* constants */ #include <sys/ioctl.h> int ioctl(int fd, UFFDIO_UNREGISTER, const struct uffdio_range *argp);
LIBRARY
Standard C library (libc, -lc)
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.