Fix linter errors

Author: Nikki371

internal/pkg/instrumentation/perf/perf_linux.go

@@ -9,14 +9,23 @@ import (
 	"github.com/cilium/ebpf/perf"
 )
 
-// Re-export the types from github.com/cilium/ebpf/perf
+// Re-export the types from github.com/cilium/ebpf/perf.
 type Record = perf.Record
 type Reader = perf.Reader
 type ReaderOptions = perf.ReaderOptions
 
-// Re-export the functions from github.com/cilium/ebpf/perf
+// Re-export the functions from github.com/cilium/ebpf/perf.
+// NewReader is a re-export of perf.NewReader.
 var NewReader = perf.NewReader
+
+// NewReaderWithOptions is a re-export of perf.NewReaderWithOptions.
 var NewReaderWithOptions = perf.NewReaderWithOptions
+
+// ErrClosed is a re-export of perf.ErrClosed.
 var ErrClosed = perf.ErrClosed
+
+// ErrFlushed is a re-export of perf.ErrFlushed.
 var ErrFlushed = perf.ErrFlushed
+
+// IsUnknownEvent is a re-export of perf.IsUnknownEvent.
 var IsUnknownEvent = perf.IsUnknownEvent

internal/pkg/instrumentation/perf/perf_other.go

@@ -9,7 +9,6 @@ package perf
 
 import (
 	"errors"
-	"fmt"
 	"os"
 	"time"
 
@@ -66,17 +65,17 @@ func NewReaderWithOptions(array *ebpf.Map, perCPUBuffer int, opts ReaderOptions)
 
 // Close frees resources used by the reader.
 func (r *Reader) Close() error {
-	return fmt.Errorf("perf reader: %w", ErrClosed)
+	return errors.New("perf reader already closed")
 }
 
 // Read the next record from the perf ring buffer.
 func (r *Reader) Read() (Record, error) {
-	return Record{}, fmt.Errorf("perf reader: %w", ErrClosed)
+	return Record{}, errors.New("perf reader already closed")
 }
 
 // ReadInto is like Read but allows reusing the Record.
 func (r *Reader) ReadInto(rec *Record) error {
-	return fmt.Errorf("perf reader: %w", ErrClosed)
+	return errors.New("perf reader already closed")
 }
 
 // SetDeadline controls how long Read and ReadInto will block.
@@ -86,22 +85,22 @@ func (r *Reader) SetDeadline(t time.Time) {
 
 // Pause stops all notifications from this Reader.
 func (r *Reader) Pause() error {
-	return fmt.Errorf("perf reader: %w", ErrClosed)
+	return errors.New("perf reader already closed")
 }
 
 // Resume allows this perf reader to emit notifications.
 func (r *Reader) Resume() error {
-	return fmt.Errorf("perf reader: %w", ErrClosed)
+	return errors.New("perf reader already closed")
 }
 
 // FlushAndClose flushes all pending events and closes the reader.
 func (r *Reader) FlushAndClose() error {
-	return fmt.Errorf("perf reader: %w", ErrClosed)
+	return errors.New("perf reader already closed")
 }
 
 // Flush unblocks Read/ReadInto and returns pending samples.
 func (r *Reader) Flush() error {
-	return fmt.Errorf("perf reader: %w", ErrClosed)
+	return errors.New("perf reader already closed")
 }
 
 // BufferSize returns the size in bytes of each per-CPU buffer.