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Subject[Patch 08/25] GRU - flush gru tlb when driver is loaded
From: Jack Steiner <steiner@sgi.com>

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@sgi.com>

---
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);
}


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