There are a few devices that use lots of ioremap space.  vmalloc space is a
showstopper problem for them.

this patch adds the vmalloc=<size> boot parameter to override
__VMALLOC_RESERVE.  The default is 128mb right now - e.g.  vmalloc=256m
doubles the size.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjanv@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>