UFFDIO_UNREGISTER - unregister a memory address range from userfaultfd

Unregister a memory address range from userfaultfd. The pages in the range must be “compatible” (see UFFDIO_REGISTER(2const)).

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.

See userfaultfd(2).

Linux 4.3.

Standard C library (libc, -lc)

UFFDIO_UNREGISTER - unregister a memory address range from userfaultfd

On success, 0 is returned. On error, -1 is returned and errno is set to indicate the error.

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)

Linux.

#include<linux/userfaultfd.h> /* Definition of UFFD* constants */ #include<sys/ioctl.h>intioctl(intfd,UFFDIO_UNREGISTER,conststructuffdio_range*argp);