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powerpc/pseries/cmm: remove cmm_balloon_compaction_init()

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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 68f2736a85 ("mm: Convert all PageMovable users
to movable_operations") we actually had to undo something, now not
anymore.

Link: https://lkml.kernel.org/r/20260119230133.3551867-4-david@kernel.org
Signed-off-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Eugenio Pérez <eperezma@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jerrin Shaji George <jerrin.shaji-george@broadcom.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: SeongJae Park <sj@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
David Hildenbrand (Red Hat) 2026-01-20 00:01:11 +01:00 • committed by Andrew Morton
parent d2346b09c5
commit 5b3342cbf0
1 changed files with 5 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

16
arch/powerpc/platforms/pseries/cmm.c
View file

@ -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 @@ out_reboot_notifier:
unregister_reboot_notifier(&cmm_reboot_nb);
out_oom_notifier:
unregister_oom_notifier(&cmm_oom_nb);
out_balloon_compaction:
return rc;
}