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-rw-r--r--man5/proc.53
1 files changed, 3 insertions, 0 deletions
diff --git a/man5/proc.5 b/man5/proc.5
index ef9ce9fed3..4f421f76d6 100644
--- a/man5/proc.5
+++ b/man5/proc.5
@@ -2071,6 +2071,9 @@ in this field.
timers display with a value of -2
in this field.
.RE
+.IP
+This file is available only when the kernel was configured with
+.BR CONFIG_CHECKPOINT_RESTORE .
.TP
.I /proc/bus/pccard/drivers
.TP