Commit 80583d0c authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

KVM: guest-memfd: fix unused-function warning 



With migration disabled, one function becomes unused:

virt/kvm/guest_memfd.c:262:12: error: 'kvm_gmem_migrate_folio' defined but not used [-Werror=unused-function]
  262 | static int kvm_gmem_migrate_folio(struct address_space *mapping,
      |            ^~~~~~~~~~~~~~~~~~~~~~

Remove the #ifdef around the reference so that fallback_migrate_folio()
is never used.  The gmem implementation of the hook is trivial; since
the gmem mapping is unmovable, the pages should not be migrated anyway.

Fixes: a7800aa8 ("KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory")
Reported-by: default avatarArnd Bergmann <arnd@arndb.de>
Suggested-by: default avatarSean Christopherson <seanjc@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 849c1816

virt/kvm/guest_memfd.c

+0 −2
Original line number Diff line number Diff line
@@ -300,9 +300,7 @@ static int kvm_gmem_error_page(struct address_space *mapping, struct page *page) 


static const struct address_space_operations kvm_gmem_aops = {

	.dirty_folio = noop_dirty_folio,

#ifdef CONFIG_MIGRATION

	.migrate_folio	= kvm_gmem_migrate_folio,

#endif

	.error_remove_page = kvm_gmem_error_page,

};