gru: fix GRU interrupt race at deallocate

Fix a race where an interrupt could be received for a GRU context that has
been deallocated.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h
index adaf691d59f5..54c3bb171eef 100644
--- a/drivers/misc/sgi-gru/grutables.h
+++ b/drivers/misc/sgi-gru/grutables.h
@@ -192,6 +192,7 @@ struct gru_stats_s {
         atomic_long_t intr;
         atomic_long_t intr_cbr;
         atomic_long_t intr_tfh;
+        atomic_long_t intr_spurious;
         atomic_long_t intr_mm_lock_failed;
         atomic_long_t call_os;
         atomic_long_t call_os_wait_queue;