1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c
index 679e01778286..2605edfbaebe 100644
--- a/drivers/misc/sgi-gru/grufault.c
+++ b/drivers/misc/sgi-gru/grufault.c
@@ -733,6 +733,11 @@ long gru_get_gseg_statistics(unsigned long arg)
         if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
                 return -EFAULT;
 
+        /*
+         * The library creates arrays of contexts for threaded programs.
+         * If no gts exists in the array, the context has never been used & all
+         * statistics are implicitly 0.
+         */
         gts = gru_find_lock_gts(req.gseg);
         if (gts) {
                 memcpy(&req.stats, &gts->ustats, sizeof(gts->ustats));