GRU Driver V3: fixes to resolve code review comments
Fixes problems identified in a code review:
- add comment with high level dscription of the GRU
- prepend "gru_" to all global names
- delete unused function
- couple of trivial bug fixes
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jack Steiner <steiner@sgi.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/sgi-gru/grutlbpurge.c b/drivers/misc/sgi-gru/grutlbpurge.c
index bb6b0e6..bcfd542 100644
--- a/drivers/misc/sgi-gru/grutlbpurge.c
+++ b/drivers/misc/sgi-gru/grutlbpurge.c
@@ -242,7 +242,9 @@
struct gru_mm_struct *gms = container_of(mn, struct gru_mm_struct,
ms_notifier);
- atomic_dec(&gms->ms_range_active);
+ /* ..._and_test() provides needed barrier */
+ (void)atomic_dec_and_test(&gms->ms_range_active);
+
wake_up_all(&gms->ms_wait_queue);
gru_dbg(grudev, "gms %p, start 0x%lx, end 0x%lx\n", gms, start, end);
}