[Patch 08/25] GRU - flush gru tlb when driver is loaded

[steiner]

From: Jack Steiner <steiner@xxxxxxx>

Flush the GRU TLB when the GRU driver is loaded. There may be stale
entries in the TLB if a previous GRU was unloaded since the system
was last reset.

Signed-off-by: Jack Steiner <steiner@xxxxxxx>

---
 drivers/misc/sgi-gru/grutlbpurge.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux/drivers/misc/sgi-gru/grutlbpurge.c
===================================================================
--- linux.orig/drivers/misc/sgi-gru/grutlbpurge.c	2010-06-09 08:11:42.087537647 -0500
+++ linux/drivers/misc/sgi-gru/grutlbpurge.c	2010-06-09 08:11:42.891554573 -0500
@@ -380,4 +380,6 @@ void gru_tgh_flush_init(struct gru_state
 	/* first starting TGH index to use for remote purges */
 	gru->gs_tgh_first_remote = (cpus + (1 << shift) - 1) >> shift;
 
+	/* flush the GRU TLB in case there are stale entries present */
+	gru_flush_all_tlb(gru);
 }

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/