idle_regs() must be __cpuinit

Fix the following section mismatch with CONFIG_HOTPLUG=n,
CONFIG_HOTPLUG_CPU=y:

WARNING: vmlinux.o(.text+0x399a6): Section mismatch: reference to .init.text.5:idle_regs (between 'fork_idle' and 'get_task_mm')
Signed-off-by: NAdrian Bunk <bunk@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/ia64/kernel/smpboot.c

@@ -476,7 +476,7 @@ start_secondary (void *unused)
 	return 0;
 }
 
-struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
+struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
 {
 	return NULL;
 }

arch/x86/kernel/cpu/common.c

@@ -637,7 +637,7 @@ void __init early_cpu_init(void)
 }
 
 /* Make sure %fs is initialized properly in idle threads */
-struct pt_regs * __devinit idle_regs(struct pt_regs *regs)
+struct pt_regs * __cpuinit idle_regs(struct pt_regs *regs)
 {
 	memset(regs, 0, sizeof(struct pt_regs));
 	regs->fs = __KERNEL_PERCPU;

kernel/fork.c

@@ -1399,7 +1399,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
 	return ERR_PTR(retval);
 }
 
-noinline struct pt_regs * __devinit __attribute__((weak)) idle_regs(struct pt_regs *regs)
+noinline struct pt_regs * __cpuinit __attribute__((weak)) idle_regs(struct pt_regs *regs)
 {
 	memset(regs, 0, sizeof(struct pt_regs));
 	return regs;