char: misc: Increase the maximum number of dynamic misc devices to 1048448
On AmpereOne, 128 dynamic misc devices is not enough for the per-cpu coresight_tmc devices. Switch the dynamic minors allocator to an ida and add logic to allocate in the ranges [0..127] and [256..1048575], leaving [128..255] for static misc devices. Dynamic allocations start from 127 growing downwards and then increasing from 256, so device numbering for the first 128 devices remain the same as before. Signed-off-by:D Scott Phillips <scott@os.amperecomputing.com> Link: https://lore.kernel.org/r/20221114212212.9279-1-scott@os.amperecomputing.com Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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