lguest: prepare to make SWITCHER_ADDR a variable.
authorRusty Russell <rusty@rustcorp.com.au>
Mon, 22 Apr 2013 04:40:37 +0000 (14:10 +0930)
committerRusty Russell <rusty@rustcorp.com.au>
Mon, 22 Apr 2013 06:01:33 +0000 (15:31 +0930)
We currently use the whole top PGD entry for the switcher, but that's
hitting the fixmap in some configurations (mainly, large NR_CPUS).
Introduce a variable, currently set to the constant.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

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