1 files changed, 0 insertions, 127 deletions
diff --git a/pkg/sentry/fs/ashmem/pin_board.go b/pkg/sentry/fs/ashmem/pin_board.go
deleted file mode 100644
index c5400dd94..000000000
--- a/pkg/sentry/fs/ashmem/pin_board.go
+++ /dev/null
@@ -1,127 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package ashmem
-
-import "gvisor.dev/gvisor/pkg/abi/linux"
-
-const maxUint64 = ^uint64(0)
-
-// setFunctions implements segment.Functions generated from segment.Functions for
-// uint64 Key and noValue Value. For more information, see the build file and
-// segment set implementation at pkg/segment/set.go.
-type setFunctions struct{}
-
-// noValue is a type of range attached value, which is irrelevant here.
-type noValue struct{}
-
-// MinKey implements segment.Functions.MinKey.
-func (setFunctions) MinKey() uint64 {
-	return 0
-}
-
-// MaxKey implements segment.Functions.MaxKey.
-func (setFunctions) MaxKey() uint64 {
-	return maxUint64
-}
-
-// ClearValue implements segment.Functions.ClearValue.
-func (setFunctions) ClearValue(*noValue) {
-	return
-}
-
-// Merge implements segment.Functions.Merge.
-func (setFunctions) Merge(Range, noValue, Range, noValue) (noValue, bool) {
-	return noValue{}, true
-}
-
-// Split implements segment.Functions.Split.
-func (setFunctions) Split(Range, noValue, uint64) (noValue, noValue) {
-	return noValue{}, noValue{}
-}
-
-// PinBoard represents a set of pinned ranges in ashmem.
-//
-// segment.Set is used for implementation where segments represent
-// ranges of pinned bytes, while gaps represent ranges of unpinned
-// bytes. All ranges are page-aligned.
-//
-// +stateify savable
-type PinBoard struct {
-	Set
-}
-
-// NewPinBoard creates a new pin board with all pages pinned.
-func NewPinBoard() *PinBoard {
-	var pb PinBoard
-	pb.PinRange(Range{0, maxUint64})
-	return &pb
-}
-
-// PinRange pins all pages in the specified range and returns true
-// if there are any newly pinned pages.
-func (pb *PinBoard) PinRange(r Range) bool {
-	pinnedPages := false
-	for gap := pb.LowerBoundGap(r.Start); gap.Ok() && gap.Start() < r.End; {
-		common := gap.Range().Intersect(r)
-		if common.Length() == 0 {
-			gap = gap.NextGap()
-			continue
-		}
-		pinnedPages = true
-		gap = pb.Insert(gap, common, noValue{}).NextGap()
-	}
-	return pinnedPages
-}
-
-// UnpinRange unpins all pages in the specified range.
-func (pb *PinBoard) UnpinRange(r Range) {
-	for seg := pb.LowerBoundSegment(r.Start); seg.Ok() && seg.Start() < r.End; {
-		common := seg.Range().Intersect(r)
-		if common.Length() == 0 {
-			seg = seg.NextSegment()
-			continue
-		}
-		seg = pb.RemoveRange(common).NextSegment()
-	}
-}
-
-// RangePinnedStatus returns false if there's at least one unpinned page in the
-// specified range.
-func (pb *PinBoard) RangePinnedStatus(r Range) bool {
-	for gap := pb.LowerBoundGap(r.Start); gap.Ok() && gap.Start() < r.End; {
-		common := gap.Range().Intersect(r)
-		if common.Length() == 0 {
-			gap = gap.NextGap()
-			continue
-		}
-		return false
-	}
-	return true
-}
-
-// RangeFromAshmemPin converts ashmem's original pin structure
-// to Range.
-func RangeFromAshmemPin(ap linux.AshmemPin) Range {
-	if ap.Len == 0 {
-		return Range{
-			uint64(ap.Offset),
-			maxUint64,
-		}
-	}
-	return Range{
-		uint64(ap.Offset),
-		uint64(ap.Offset) + uint64(ap.Len),
-	}
-}