[origin tree build failure] [PATCH] block: removeblk_iopoll_enabled

[Ingo Molnar]

Note, upstream now breaks the build occasionally if CONFIG_BLOCK is 
disabled:

 kernel/built-in.o:(.data+0x17b0): undefined reference to `blk_iopoll_enabled'

Kamalesh Babulal posted a fix for that two weeks ago, i suspect it 
should be picked up - find it below.

	Ingo

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