1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
index 9e9bad8bdcf4..dbce1263bdff 100644
--- a/drivers/char/sysrq.c
+++ b/drivers/char/sysrq.c
@@ -402,6 +402,7 @@ static struct sysrq_key_op *sysrq_key_table[36] = {
         &sysrq_showstate_blocked_op,    /* w */
         /* x: May be registered on ppc/powerpc for xmon */
         NULL,                           /* x */
+        /* y: May be registered on sparc64 for global register dump */
         NULL,                           /* y */
         NULL                            /* z */
 };