Re: [PATCH v2 03/23] powerpc/pseries/cmm: remove cmm_balloon_compaction_init()
From: Lorenzo Stoakes <hidden>
Date: 2026-01-15 11:47:11
Also in:
linux-doc, linux-mm, lkml, virtualization
On Thu, Jan 15, 2026 at 10:19:53AM +0100, David Hildenbrand (Red Hat) wrote:
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") we actually had to undo something, now not anymore.
Signed-off-by: David Hildenbrand (Red Hat) <david@kernel.org>Seems reasonable so: Reviewed-by: Lorenzo Stoakes <redacted>
quoted hunk ↗ jump to hunk
--- 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 4cbbe2ee58aba..9a6efbc80d2ad 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:
So silly, I assume before there was more that happened here?
return rc; } -- 2.52.0