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* [PATCH] iio: adc: max1363: constify attribute_group structures
@ 2017-03-28 20:15 simran singhal
  2017-03-29 21:11 ` Jonathan Cameron
  0 siblings, 1 reply; 4+ messages in thread
From: simran singhal @ 2017-03-28 20:15 UTC (permalink / raw)
  To: jic23
  Cc: Hartmut Knaack, Lars-Peter Clausen, Peter Meerwald-Stadler,
	linux-iio, linux-kernel, outreachy-kernel

Check for attribute_group structures that are only stored in the
event_attrs filed of iio_info structure. As the event_attrs field of
iio_info structures is constant, so these attribute_group structures can
also be declared constant. Done using coccinelle:

@r1 disable optional_qualifier @
identifier i;
position p;
@@
static struct attribute_group i@p = {...};

@ok1@
identifier r1.i;
position p;
struct iio_info x;
@@
x.event_attrs=&i@p;

@bad@
position p!={r1.p,ok1.p};
identifier r1.i;
@@
i@p

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
static
+const
struct attribute_group i={...};

@depends on !bad disable optional_qualifier@
identifier r1.i;
@@
+const
struct attribute_group i;

File size before:
   text    data     bss     dec     hex filename
  36951     448       0   37399    9217 drivers/iio/adc/max1363.o

File size after:
   text	   data	    bss	    dec	    hex	filename
  37015	    384	      0	  37399	   9217	drivers/iio/adc/max1363.o

Signed-off-by: simran singhal <singhalsimran0@gmail.com>
---
 drivers/iio/adc/max1363.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
index c6c12fe..80eada4 100644
--- a/drivers/iio/adc/max1363.c
+++ b/drivers/iio/adc/max1363.c
@@ -1007,7 +1007,7 @@ static struct attribute *max1363_event_attributes[] = {
 	NULL,
 };
 
-static struct attribute_group max1363_event_attribute_group = {
+static const struct attribute_group max1363_event_attribute_group = {
 	.attrs = max1363_event_attributes,
 };
 
-- 
2.7.4


^ permalink raw reply related	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2017-03-29 21:31 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2017-03-28 20:15 [PATCH] iio: adc: max1363: constify attribute_group structures simran singhal
2017-03-29 21:11 ` Jonathan Cameron
2017-03-29 21:28   ` SIMRAN SINGHAL
2017-03-29 21:31     ` [Outreachy kernel] " Julia Lawall

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