[PATCH] Online CPU with maxcpus option panics

I booted IA64 kernel with "maxcpus=" set to less than the total available
processors in the system.  Then I tried to online the CPU which was offline
due to "maxcpus=" restirction.  i.e when I tried to online the CPU which
never was online at boot crashed the system.
Signed-off-by: Anil Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ia64/kernel/smpboot.c

@@ -356,7 +356,7 @@ start_secondary (void *unused)
 	return cpu_idle();
 }
 
-struct pt_regs * __init idle_regs(struct pt_regs *regs)
+struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
 {
 	return NULL;
 }

kernel/fork.c

@@ -1179,13 +1179,13 @@ static task_t *copy_process(unsigned long clone_flags,
 	goto fork_out;
 }
 
-struct pt_regs * __init __attribute__((weak)) idle_regs(struct pt_regs *regs)
+struct pt_regs * __devinit __attribute__((weak)) idle_regs(struct pt_regs *regs)
 {
 	memset(regs, 0, sizeof(struct pt_regs));
 	return regs;
 }
 
-task_t * __init fork_idle(int cpu)
+task_t * __devinit fork_idle(int cpu)
 {
 	task_t *task;
 	struct pt_regs regs;