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powerpc: Fix SMP build with disabled CPU hotplugging.

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Compiling 2.6.33 with SMP enabled and HOTPLUG_CPU disabled gives me the
following link errors:

  LD      init/built-in.o
  LD      .tmp_vmlinux1
arch/powerpc/platforms/built-in.o: In function `.smp_xics_setup_cpu':
smp.c:(.devinit.text+0x88): undefined reference to `.set_cpu_current_state'
smp.c:(.devinit.text+0x94): undefined reference to `.set_default_offline_state'
arch/powerpc/platforms/built-in.o: In function `.smp_pSeries_kick_cpu':
smp.c:(.devinit.text+0x13c): undefined reference to `.set_preferred_offline_state'
smp.c:(.devinit.text+0x148): undefined reference to `.get_cpu_current_state'
smp.c:(.devinit.text+0x1a8): undefined reference to `.get_cpu_current_state'
make: *** [.tmp_vmlinux1] Error 1

The following change fixes that for me and seems to work as expected.

Signed-off-by: Adam Lackorzynski <adam@os.inf.tu-dresden.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Adam Lackorzynski 2010-02-27 07:07:59 +00:00 committed by Benjamin Herrenschmidt
parent 1426d5a3bd
commit 5b72d74ce2
1 changed files with 21 additions and 1 deletions
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22
arch/powerpc/platforms/pseries/offline_states.h
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@ -9,10 +9,30 @@ enum cpu_state_vals {
CPU_MAX_OFFLINE_STATES
};
#ifdef CONFIG_HOTPLUG_CPU
extern enum cpu_state_vals get_cpu_current_state(int cpu);
extern void set_cpu_current_state(int cpu, enum cpu_state_vals state);
extern enum cpu_state_vals get_preferred_offline_state(int cpu);
extern void set_preferred_offline_state(int cpu, enum cpu_state_vals state);
extern void set_default_offline_state(int cpu);
#else
static inline enum cpu_state_vals get_cpu_current_state(int cpu)
{
return CPU_STATE_ONLINE;
}
static inline void set_cpu_current_state(int cpu, enum cpu_state_vals state)
{
}
static inline void set_preferred_offline_state(int cpu, enum cpu_state_vals state)
{
}
static inline void set_default_offline_state(int cpu)
{
}
#endif
extern enum cpu_state_vals get_preferred_offline_state(int cpu);
extern int start_secondary(void);
#endif