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Previously, registering this early console would just result in dropping early buffered printk output until a udbg_putc was registered. However, commit 69331af79cf29e26d1231152a172a1a10c2df511 clears the CON_PRINTBUFFER flag on the main console when a CON_BOOT (early) console has been registered, resulting in the buffered messages never being displayed to the user. This fixes the problem by making sure we don't register udbg_console on platforms that don't implement udbg_putc. Signed-off-by: Milton Miller <miltonm@bga.com> Acked-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Paul Mackerras <paulus@samba.org>