Good point. On Mon, 8 Mar 2010, Masao Uebayashi wrote:
Define acpi_power.c as a needs-flag (or needs-count) file, and include the generated header file. Then you can use #if <foo> preprocessor directives to determine if you have the power device configured. If yes, then feel free to call the initialization code and to register the consumers; if not defined, but you find that you want to register a consumer, report it using aprint_error_dev()
New code should not use needs-flag. It's module-unfriendly. :) Masao
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