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3d52fd274e
It has been added on Linux 6.10 (8be7258aad44b5e25977a98db136f677fa6f4370) as a way to block operations such as mapping, moving to another location, shrinking the size, expanding the size, or modifying it to a pre-existing memory mapping. Although the system only works on 64-bit CPUs, the entrypoint was added for all ABIs (since the kernel might eventually implement it for additional ones and/or the ABI can execute on a 64-bit kernel). Checked on x86_64-linux-gnu and aarch64-linux-gnu. Reviewed-by: Collin Funk <collin.funk1@gmail.com>