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Thu, 06 Aug 2020 12:33:57 -0700 From: Ralph Campbell To: , CC: Randy Dunlap , Jerome Glisse , John Hubbard , Christoph Hellwig , "Jason Gunthorpe" , Andrew Morton , Ralph Campbell Subject: [PATCH] mm/migrate: fix migrate_pgmap_owner w/o CONFIG_MMU_NOTIFIER Date: Thu, 6 Aug 2020 12:33:53 -0700 Message-ID: <20200806193353.7124-1-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable Content-Type: text/plain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1596742393; bh=p8Y/nFQLLNnrnLBeQIsBixY5c1DG7LMFlrm6+gZS1x4=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: MIME-Version:X-NVConfidentiality:Content-Transfer-Encoding: Content-Type; b=hdyP32H7zn64syR4uT2rTRA19/BK9LVSo77ZlfxRaEaWLAN9mN4aJNIUt0HN/YTno Q5j7tY7uT8QkwqqGnkx0bKi0Y9UrLXoNzmJv2+TxP4b2KxXKY6f+2z7sn5TSA6ATRx fC+yCpHqC7Can5iuWzDaw6m0J+BixA/WeX6uH1YwnBjVmQiC55p9vv27jYpQmRFXa5 eqMZADCP3xNirIgSXPKn2gpzqk00mHnO/ehVgyaH07L1Hr+P/uA99z34Xsp2l7BXjA mbQWdpwCL/GmJBsBtTsCNwQyk7GYyu404Ag2zVnmus/QgY3qPUgLiVwY0lVtA1hoD1 hfs/l3kW4xWAg== X-Rspamd-Queue-Id: 3AEA36D67 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On x86_64, when CONFIG_MMU_NOTIFIER is not set/enabled, there is a compiler error: ../mm/migrate.c: In function 'migrate_vma_collect': ../mm/migrate.c:2481:7: error: 'struct mmu_notifier_range' has no member named 'migrate_pgmap_owner' range.migrate_pgmap_owner =3D migrate->pgmap_owner; ^ Fixes: 998427b3ad2c ("mm/notifier: add migration invalidation type") Signed-off-by: Ralph Campbell Reported-by: Randy Dunlap --- This is based on the latest linux and is for Andrew Morton's mm tree. MMU_NOTIFIER is selected automatically by a number of other config options so I missed this in my own testing. Thanks to Randy Dunlap for finding it. include/linux/mmu_notifier.h | 13 +++++++++++++ mm/migrate.c | 6 +++--- 2 files changed, 16 insertions(+), 3 deletions(-) diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index c6f0708195cd..b8200782dede 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -521,6 +521,16 @@ static inline void mmu_notifier_range_init(struct mmu_= notifier_range *range, range->flags =3D flags; } =20 +static inline void mmu_notifier_range_init_migrate( + struct mmu_notifier_range *range, unsigned int flags, + struct vm_area_struct *vma, struct mm_struct *mm, + unsigned long start, unsigned long end, void *pgmap) +{ + mmu_notifier_range_init(range, MMU_NOTIFY_MIGRATE, flags, vma, mm, + start, end); + range->migrate_pgmap_owner =3D pgmap; +} + #define ptep_clear_flush_young_notify(__vma, __address, __ptep) \ ({ \ int __young; \ @@ -645,6 +655,9 @@ static inline void _mmu_notifier_range_init(struct mmu_= notifier_range *range, =20 #define mmu_notifier_range_init(range,event,flags,vma,mm,start,end) \ _mmu_notifier_range_init(range, start, end) +#define mmu_notifier_range_init_migrate(range, flags, vma, mm, start, end,= \ + pgmap) \ + _mmu_notifier_range_init(range, start, end) =20 static inline bool mmu_notifier_range_blockable(const struct mmu_notifier_range *range) diff --git a/mm/migrate.c b/mm/migrate.c index 4fcc465736ff..d179657f8685 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2386,9 +2386,9 @@ static void migrate_vma_collect(struct migrate_vma *m= igrate) * that the registered device driver can skip invalidating device * private page mappings that won't be migrated. */ - mmu_notifier_range_init(&range, MMU_NOTIFY_MIGRATE, 0, migrate->vma, - migrate->vma->vm_mm, migrate->start, migrate->end); - range.migrate_pgmap_owner =3D migrate->pgmap_owner; + mmu_notifier_range_init_migrate(&range, 0, migrate->vma, + migrate->vma->vm_mm, migrate->start, migrate->end, + migrate->pgmap_owner); mmu_notifier_invalidate_range_start(&range); =20 walk_page_range(migrate->vma->vm_mm, migrate->start, migrate->end, --=20 2.20.1