[PATCH v1 03/23] powerpc/pseries/cmm: remove cmm_balloon_compaction_init()

[David Hildenbrand]

Now that there is not a lot of logic left, let's just inline setting up
the migration function.

To avoid #ifdef in the caller we can instead use IS_ENABLED() and make
the compiler happy by only providing the function declaration.

Now that the function is gone, drop the "out_balloon_compaction" label.
Note that before commit 68f2736a8583 ("mm: Convert all PageMovable users
to movable_operations"), now not anymore.

Signed-off-by: David Hildenbrand <da...@redhat.com>
---
 arch/powerpc/platforms/pseries/cmm.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/cmm.c 
b/arch/powerpc/platforms/pseries/cmm.c
index 310dab4bc8679..67c7309c36147 100644
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c
@@ -548,15 +548,9 @@ static int cmm_migratepage(struct balloon_dev_info 
*b_dev_info,
 
        return 0;
 }
-
-static void cmm_balloon_compaction_init(void)
-{
-       b_dev_info.migratepage = cmm_migratepage;
-}
 #else /* CONFIG_BALLOON_COMPACTION */
-static void cmm_balloon_compaction_init(void)
-{
-}
+int cmm_migratepage(struct balloon_dev_info *b_dev_info, struct page *newpage,
+                   struct page *page, enum migrate_mode mode);
 #endif /* CONFIG_BALLOON_COMPACTION */
 
 /**
@@ -573,11 +567,12 @@ static int cmm_init(void)
                return -EOPNOTSUPP;
 
        balloon_devinfo_init(&b_dev_info);
-       cmm_balloon_compaction_init();
+       if (IS_ENABLED(CONFIG_BALLOON_COMPACTION))
+               b_dev_info.migratepage = cmm_migratepage;
 
        rc = register_oom_notifier(&cmm_oom_nb);
        if (rc < 0)
-               goto out_balloon_compaction;
+               return rc;
 
        if ((rc = register_reboot_notifier(&cmm_reboot_nb)))
                goto out_oom_notifier;
@@ -606,7 +601,6 @@ static int cmm_init(void)
        unregister_reboot_notifier(&cmm_reboot_nb);
 out_oom_notifier:
        unregister_oom_notifier(&cmm_oom_nb);
-out_balloon_compaction:
        return rc;
 }
 
-- 
2.51.0