Andreas Kling b807f1c3fc Kernel: Fail madvise() volatile change with EINVAL for non-purgeable mem ...

AnonymousVMObject::set_volatile() assumes that nobody ever calls it on
non-purgeable objects, so let's make sure we don't do that.

Also return EINVAL instead of EPERM for non-anonymous VM objects so the
error codes match.

2021-07-28 20:42:49 +02:00

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