[bisected] 2.6.39 breaks floppy

[Ondrej Zary]

Hello,
floppy stopped working in 2.6.39 (confirmed on two machines). 2.6.38 worked 
fine. 
/dev/fd0 is created but does not work (mdir says: "No such device or address", 
mount says "/dev/fd0 is not a valid block device"). dmesg shows no errors:

Floppy drive(s): fd0 is 1.44M
FDC 0 is a post-1991 82077

Bisected it to 9fd097b14918875bd6f125ed699d7bbbba5893ee
(block: unexport DISK_EVENT_MEDIA_CHANGE for legacy/fringe drivers)

Adding the removed line back to floppy.c fixes the problem.

-- 
Ondrej Zary
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