[PATCH] PM: sleep: only allow relevant powerpc platforms to enable PM_SLEEP_SMP

[Julian Braha]

PM_SLEEP_SMP selects HOTPLUG_CPU, but on some powerpc platforms, this
creates an unmet dependency such as:

WARNING: unmet direct dependencies detected for HOTPLUG_CPU
  Depends on [n]: SMP [=y] && (PPC_PSERIES [=n] || PPC_PMAC [=n] || PPC_POWERNV [=n] || FSL_SOC_BOOKE [=n])
  Selected by [y]:
  - PM_SLEEP_SMP [=y] && SMP [=y] && (ARCH_SUSPEND_POSSIBLE [=y] || ARCH_HIBERNATION_POSSIBLE [=y]) && PM_SLEEP [=y]

because HOTPLUG_CPU is only available on powerpc platforms IBM pSeries and
PowerNV, Apple PowerMac, and Freescale Book-E.

For powerpc, let's ensure that PM_SLEEP_SMP can only be enabled on those
systems that support HOTPLUG_CPU.

Fixes: f3de4be9d5f8 ("PM: Fix dependencies of CONFIG_SUSPEND and CONFIG_HIBERNATION")
Signed-off-by: Julian Braha <julianbraha@xxxxxxxxx>
---
 kernel/power/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index 71165e7f04f4..7cb6495ffaa0 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -146,6 +146,7 @@ config PM_SLEEP_SMP
 	def_bool y
 	depends on SMP
 	depends on ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE
+	depends on PPC_PSERIES || PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE if PPC
 	depends on PM_SLEEP
 	select HOTPLUG_CPU
 
-- 
2.55.0