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[2003:d8:2f4e:3200:c99d:a38b:3f3a:d4b3]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-427f009a781sm20658322f8f.30.2025.10.21.05.59.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Oct 2025 05:59:38 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, Broadcom internal kernel review list , linux-doc@vger.kernel.org, virtualization@lists.linux.dev, David Hildenbrand , Andrew Morton , Oscar Salvador , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jonathan Corbet , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Arnd Bergmann , Greg Kroah-Hartman , Jerrin Shaji George , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?UTF-8?q?Eugenio=20P=C3=A9rez?= , Zi Yan Subject: [PATCH v1 03/23] powerpc/pseries/cmm: remove cmm_balloon_compaction_init() Date: Tue, 21 Oct 2025 14:59:08 +0200 Message-ID: <20251021125929.377194-4-david@redhat.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251021125929.377194-1-david@redhat.com> References: <20251021125929.377194-1-david@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- 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, =20 return 0; } - -static void cmm_balloon_compaction_init(void) -{ - b_dev_info.migratepage =3D 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 *newp= age, + struct page *page, enum migrate_mode mode); #endif /* CONFIG_BALLOON_COMPACTION */ =20 /** @@ -573,11 +567,12 @@ static int cmm_init(void) return -EOPNOTSUPP; =20 balloon_devinfo_init(&b_dev_info); - cmm_balloon_compaction_init(); + if (IS_ENABLED(CONFIG_BALLOON_COMPACTION)) + b_dev_info.migratepage =3D cmm_migratepage; =20 rc =3D register_oom_notifier(&cmm_oom_nb); if (rc < 0) - goto out_balloon_compaction; + return rc; =20 if ((rc =3D 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; } =20 --=20 2.51.0