[PATCH 3/4] xen: move XEN_BALLOON_MEMORY_HOTPLUG to generic config

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While reviewing arch/x86/configs/xen.config, I noticed the following
note in this file:

  '# depends on MEMORY_HOTPLUG, arm64 doesn't enable this yet,
  '# move to generic config if it ever does.
  CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=y

Commit 6c6685055a28 ("kconfig: add xenconfig defconfig helper") in June
2015 adds this note. Fortunately, commit 4ab215061554 ("arm64: Add memory
hotplug support") from December 2018 adds the memory hotplug in arm64, so
the precondition of this note above is now met.

Move setting the config XEN_BALLOON_MEMORY_HOTPLUG into the generic
xen.config now.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
---
 arch/x86/configs/xen.config | 3 ---
 kernel/configs/xen.config   | 1 +
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/configs/xen.config b/arch/x86/configs/xen.config
index 8a6c88f48e75..024817bc4f0e 100644
--- a/arch/x86/configs/xen.config
+++ b/arch/x86/configs/xen.config
@@ -23,6 +23,3 @@ CONFIG_XEN_ACPI_PROCESSOR=m
 CONFIG_XEN_PCIDEV_BACKEND=m
 # x86 specific frontend drivers
 CONFIG_XEN_PCIDEV_FRONTEND=m
-# depends on MEMORY_HOTPLUG, arm64 doesn't enable this yet,
-# move to generic config if it ever does.
-CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=y
diff --git a/kernel/configs/xen.config b/kernel/configs/xen.config
index 436f806aa1ed..ea84d5b3122d 100644
--- a/kernel/configs/xen.config
+++ b/kernel/configs/xen.config
@@ -34,6 +34,7 @@ CONFIG_INPUT_XEN_KBDDEV_FRONTEND=m
 CONFIG_XEN_SCSI_FRONTEND=m
 # others
 CONFIG_XEN_BALLOON=y
+CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=y
 CONFIG_XEN_DEV_EVTCHN=m
 CONFIG_XEN_BLKDEV_FRONTEND=m
 CONFIG_XEN_NETDEV_FRONTEND=m
-- 
2.17.1




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