When setting the 'cpu_isolated_map' mask, check that the user input value
is valid (in range 0 ..  NR_CPUS - 1).  Also fix up kernel-parameters.txt
for this parameter.
Signed-off-by: Randy Dunlap <rddunlap@osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>