Tomas Carnecky wrote:
Why are the DRM() macros used in the linux kernel drivers? I'm sure this has been discussed many times, but I can't find anything about it. Any explanations or pointers to webpages (archives) where it's explained are welcome.
Each DRM driver contains a slightly customized copy of some functions. The customzations are based on driver-specific #defines. The DRM macro is used to convert the generic name (i.e., addmap) to a device-specific name (i.e., radeon_addmap). This also makes it so that you can load multiple DRM modules into your kernel at once. If every DRM module had a function called addmap, you could only have one at a time.
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