linux-kernel - [PATCH] reset: constify reset_control

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Date:   Mon,  9 Jan 2017 22:23:55 +0530
From:   Bhumika Goyal <bhumirks@...il.com>
To:     julia.lawall@...6.fr, p.zabel@...gutronix.de,
        linux-kernel@...r.kernel.org
Cc:     Bhumika Goyal <bhumirks@...il.com>
Subject: [PATCH] reset: constify reset_control_ops structures

Declare reset_control_ops structures as const as they are only stored
in the ops field of a reset_controller_dev structure. This field is of
type const struct reset_control_ops *, so reset_control_ops structures
having this property can be declared as const.
Done using Coccinelle:

@r1 disable optional_qualifier@
identifier i;
position p;
@@
static struct reset_control_ops i@......};

@ok1@
identifier r1.i;
position p;
struct ti_syscon_reset_data data;
@@
data.rcdev.ops=&i@p;

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

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

File size before: drivers/reset/reset-ti-syscon.o
   text	   data	    bss	    dec	    hex	filename
   1329	    240	      0	   1569	    621	drivers/reset/reset-ti-syscon.o

File size after: drivers/reset/reset-ti-syscon.o
   text	   data	    bss	    dec	    hex	filename
   1377	    192	      0	   1569	    621	drivers/reset/reset-ti-syscon.o

Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
---
 drivers/reset/reset-ti-syscon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/reset/reset-ti-syscon.c b/drivers/reset/reset-ti-syscon.c
index 47f0ffd..50d938c 100644
--- a/drivers/reset/reset-ti-syscon.c
+++ b/drivers/reset/reset-ti-syscon.c
@@ -158,7 +158,7 @@ static int ti_syscon_reset_status(struct reset_controller_dev *rcdev,
 			(control->flags & STATUS_SET);
 }
 
-static struct reset_control_ops ti_syscon_reset_ops = {
+static const struct reset_control_ops ti_syscon_reset_ops = {
 	.assert		= ti_syscon_reset_assert,
 	.deassert	= ti_syscon_reset_deassert,
 	.status		= ti_syscon_reset_status,
-- 
1.9.1