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Subject[PATCH 0/2] Add request_firmware_direct() for microcode loader

this is a patch series to introduce request_firmware_direct() helper
for avoiding the lengthy udev issue on microcode loader.
The original problem was stated in Prarit's post:

In short, microcode loader probes non-existing firmware files (which
are cases with every new chip), and each probe takes 60 seconds,
resulting in too long time until completed.

This solution is simply avoiding the udev fallback in
request_firmware() explicitly for drivers like microcode.

[PATCH 1/2] firmware: Introduce request_firmware_direct()
[PATCH 2/2] microcode: Use request_firmware_direct()

Of course, this doesn't mean to throw away further optimizations like
Prarit's patch. It can be implemented in parallel with this.



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