[PATCH] Change cpu_up and co from __devinit to __cpuinit

Compiling the kernel with CONFIG_HOTPLUG = y and CONFIG_HOTPLUG_CPU = n
with CONFIG_RELOCATABLE = y generates the following modpost warnings

WARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141b7d) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141b9c) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.text:__cpu_up
from .text between '_cpu_up' (at offset 0xc0141bd8) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141c05) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141c26) and 'cpu_up'
WARNING: vmlinux - Section mismatch: reference to .init.data: from
.text between '_cpu_up' (at offset 0xc0141c37) and 'cpu_up'

This is because cpu_up, _cpu_up and __cpu_up (in some architectures) are
defined as __devinit
AND
__cpu_up calls some __cpuinit functions.

Since __cpuinit would map to __init with this kind of a configuration,
we get a .text refering .init.data warning.

This patch solves the problem by converting all of __cpu_up, _cpu_up
and cpu_up from __devinit to __cpuinit. The approach is justified since
the callers of cpu_up are either dependent on CONFIG_HOTPLUG_CPU or
are of __init type.

Thus when CONFIG_HOTPLUG_CPU=y, all these cpu up functions would land up
in .text section, and when CONFIG_HOTPLUG_CPU=n, all these functions would
land up in .init section.

Tested on a i386 SMP machine running linux-2.6.20-rc3-mm1.

Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/cris/arch-v32/kernel/smp.c

@@ -195,7 +195,7 @@ int setup_profiling_timer(unsigned int multiplier)
  */
 unsigned long cache_decay_ticks = 1;
 
-int __devinit __cpu_up(unsigned int cpu)
+int __cpuinit __cpu_up(unsigned int cpu)
 {
 	smp_boot_one_cpu(cpu);
 	return cpu_online(cpu) ? 0 : -ENOSYS;

arch/m32r/kernel/smpboot.c

@@ -351,7 +351,7 @@ static void __init do_boot_cpu(int phys_id)
 	}
 }
 
-int __devinit __cpu_up(unsigned int cpu_id)
+int __cpuinit __cpu_up(unsigned int cpu_id)
 {
 	int timeout;
 

arch/mips/kernel/smp.c

@@ -271,7 +271,7 @@ void __devinit smp_prepare_boot_cpu(void)
  * and keep control until "cpu_online(cpu)" is set.  Note: cpu is
  * physical, not logical.
  */
-int __devinit __cpu_up(unsigned int cpu)
+int __cpuinit __cpu_up(unsigned int cpu)
 {
 	struct task_struct *idle;
 

arch/parisc/kernel/smp.c

@@ -608,7 +608,7 @@ void smp_cpus_done(unsigned int cpu_max)
 }
 
 
-int __devinit __cpu_up(unsigned int cpu)
+int __cpuinit __cpu_up(unsigned int cpu)
 {
 	if (cpu != 0 && cpu < parisc_max_cpus)
 		smp_boot_one_cpu(cpu);

arch/powerpc/kernel/smp.c

@@ -468,7 +468,7 @@ static int __devinit cpu_enable(unsigned int cpu)
 	return -ENOSYS;
 }
 
-int __devinit __cpu_up(unsigned int cpu)
+int __cpuinit __cpu_up(unsigned int cpu)
 {
 	int c;
 

arch/sparc64/kernel/smp.c

@@ -1388,7 +1388,7 @@ void __devinit smp_prepare_boot_cpu(void)
 {
 }
 
-int __devinit __cpu_up(unsigned int cpu)
+int __cpuinit __cpu_up(unsigned int cpu)
 {
 	int ret = smp_boot_one_cpu(cpu);
 

kernel/cpu.c

@@ -204,7 +204,7 @@ int cpu_down(unsigned int cpu)
 #endif /*CONFIG_HOTPLUG_CPU*/
 
 /* Requires cpu_add_remove_lock to be held */
-static int __devinit _cpu_up(unsigned int cpu)
+static int __cpuinit _cpu_up(unsigned int cpu)
 {
 	int ret;
 	void *hcpu = (void *)(long)cpu;
@@ -239,7 +239,7 @@ out_notify:
 	return ret;
 }
 
-int __devinit cpu_up(unsigned int cpu)
+int __cpuinit cpu_up(unsigned int cpu)
 {
 	int err = 0;