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diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo
index 937106c..9c71ad2 100644
--- a/gdb/doc/gdb.texinfo
+++ b/gdb/doc/gdb.texinfo
@@ -25784,6 +25784,10 @@ it may be optional in a future version of @value{GDBN}. It should
contain registers @samp{f0} through @samp{f31}, @samp{fcsr}, and
@samp{fir}. They may be 32-bit or 64-bit depending on the target.
+The @samp{org.gnu.gdb.mips.linux} feature is optional. It should
+contain a single register, @samp{restart}, which is used by the
+Linux kernel to control restartable syscalls.
+
@include gpl.texi
@raisesections