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This has probably meant something at some point but there's no need for
it anymore - the struct mem_ctl_info allocation can happen with normal,
boring k*alloc() calls like everyone else does it.

No functional changes.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220310095254.1510-2-bp@alien8.de