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authorAlistair Popple <apopple@nvidia.com>2023-01-10 05:57:22 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-02-03 09:32:54 +0300
commit7d4a8be0c4b2b7ffb367929d2b352651f083806b (patch)
tree5212561efdf216643df182e27610050c678b515f /mm/mmu_notifier.c
parent9e5522715e6941bcfdc08d066a79d6da0f8cec8e (diff)
downloadlinux-7d4a8be0c4b2b7ffb367929d2b352651f083806b.tar.xz
mm/mmu_notifier: remove unused mmu_notifier_range_update_to_read_only export
mmu_notifier_range_update_to_read_only() was originally introduced in commit c6d23413f81b ("mm/mmu_notifier: mmu_notifier_range_update_to_read_only() helper") as an optimisation for device drivers that know a range has only been mapped read-only. However there are no users of this feature so remove it. As it is the only user of the struct mmu_notifier_range.vma field remove that also. Link: https://lkml.kernel.org/r/20230110025722.600912-1-apopple@nvidia.com Signed-off-by: Alistair Popple <apopple@nvidia.com> Acked-by: Mike Rapoport (IBM) <rppt@kernel.org> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Jerome Glisse <jglisse@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Ralph Campbell <rcampbell@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/mmu_notifier.c')
-rw-r--r--mm/mmu_notifier.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/mm/mmu_notifier.c b/mm/mmu_notifier.c
index f45ff1b7626a..50c0dde1354f 100644
--- a/mm/mmu_notifier.c
+++ b/mm/mmu_notifier.c
@@ -1120,13 +1120,3 @@ void mmu_notifier_synchronize(void)
synchronize_srcu(&srcu);
}
EXPORT_SYMBOL_GPL(mmu_notifier_synchronize);
-
-bool
-mmu_notifier_range_update_to_read_only(const struct mmu_notifier_range *range)
-{
- if (!range->vma || range->event != MMU_NOTIFY_PROTECTION_VMA)
- return false;
- /* Return true if the vma still have the read flag set. */
- return range->vma->vm_flags & VM_READ;
-}
-EXPORT_SYMBOL_GPL(mmu_notifier_range_update_to_read_only);